Chevrolet · 1999-2007
Silverado — GMT800 (1999–2007)
silverado · silverado classic · silverado ss
740 option rows 740 RPO codes 9 model years
100% Factory-verified
- ✓ Factory-verified · 737
- ● Confirmed · 0
- ◑ Single-source · 0
- ⚠ Disputed · 3
Applicable options
Documented RPO codes
Model year
| Code | Option | Years | Notes & factory source | Confidence |
|---|---|---|---|---|
| Engines | ||||
| L31 | Engine, 5.7L V8 (Vortec 5700), CPI | 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| L33 | Engine, 5.3L V8 high output, aluminum block | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. | Factory-verified |
| L35 | Engine, 4.3L V6 (Vortec 4300), CPI | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| L59 | Engine, 5.3L V8 flexible fuel (gasoline/E85) | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.198. GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. | Factory-verified |
| LM7 | Engine, 5.3L V8 (Vortec 5300), iron block | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| LQ4 | Engine, 6.0L V8 (Vortec 6000), iron block | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| LQ9 | Engine, 6.0L V8 high output (Vortec HO 6000), iron block | 2002–2007 | the Silverado SS engine in the 2003 and 2005 SS order guides GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| LR4 | Engine, 4.8L V8 (Vortec 4800), iron block | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| LU3 | Engine, 4.3L V6 (Vortec 4300), MFI | 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. | Factory-verified |
| Transmissions | ||||
| M30 | Transmission, 4-speed automatic, Hydra-Matic 4L60-E | 1999–2007 | the 2001 list prints MW3's 5-speed manual wording against M30 GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. | Factory-verified |
| M32 | Transmission, 4-speed automatic, Hydra-Matic 4L60-E, heavy-duty | 2001–2007 | the 2001–2002 lists word it as the light-duty 4L60-E GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.129. | Factory-verified |
| M33 | Transmission, 4-speed automatic, Hydra-Matic 4L60-E, hybrid | 2004–2007 | Factory-verified | |
| M70 | Transmission, 4-speed automatic, Hydra-Matic 4L70-E | 2006–2007 | Factory-verified | |
| M96 | Transmission, 5-speed manual, Tremec 109 mm, 5.81 first gear | 2003, 2005–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| MG5 | Transmission, 5-speed manual, light-duty | 1999–2007 | 1999–2000 lists: New Venture Gear, 4.02 first gear; 2001–2007 lists: Getrag 84 mm, 4.00 first gear GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. | Factory-verified |
| MT1 | Transmission, 4-speed automatic, heavy-duty, Hydra-Matic 4L80-E | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| MW3 | Transmission, 5-speed manual, New Venture Gear 109 mm, 5.61 first gear | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NP1 | Transfer case, electric shift, 2-speed | 2000–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NP2 | Transfer case, manual shift, 2-speed | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NP3 | Transfer case, all-wheel drive | 2000–2001, 2003–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NP8 | Transfer case, active (Autotrac), 2-speed, push-button control | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NR4 | Transfer case, 4WD, open differential, 2-speed | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| TZ0 | Transmission, 5-speed manual, Tremec 85 mm, 3.82 first gear | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| Axles | ||||
| G80 | Rear axle, locking differential | 1999–2007 | the 2001–2007 lists word it as a Positraction limited-slip axle GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| G86 | Rear axle, limited-slip differential | 2002–2005 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. | Factory-verified |
| GH0 | Rear axle ratio 3.54 | 2000 | Factory-verified | |
| GT4 | Rear axle ratio 3.73 | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| GT5 | Rear axle ratio 4.10 | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| GTY | Rear axle, wide track | 2000–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| GU4 | Rear axle ratio 3.08 | 1999–2001, 2003–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2004 Chevrolet Silverado, p.65. | Factory-verified |
| GU5 | Rear axle ratio 3.23 | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| GU6 | Rear axle ratio 3.42 | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| HC4 | Rear axle ratio 4.65 | 2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. | Factory-verified |
| R04 | Rear wheels, single | 2000 | the 2000 service lists print it RO4 (letter O) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. | Factory-verified |
| R05 | Rear wheels, dual | 2000 | the 2000 service lists print it Ro5 (letter O); the 1999–2000 JH7 entries cite it as R05 GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. | Factory-verified |
| YD7 | Axle (with dual rear wheels R05) for GVW plate scheduling | 2001 | Factory-verified | |
| Packages & Trims | ||||
| 1LS | Equipment group: LS (1LS) | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.239. GM Heritage factory kit — 2007 Chevrolet Silverado, p.234. | Factory-verified |
| 1LT | Equipment group: LT1 (1LT) | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.231. GM Heritage factory kit — 2007 Chevrolet Silverado, p.234. | Factory-verified |
| 1SA | Equipment group: Base | 2003, 2005 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.191. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.174. | Factory-verified |
| 1SB | Equipment group: LS | 2003, 2005 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.191. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.174. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.102. | Factory-verified |
| 1SC | Equipment group: LT | 2003, 2005 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.191. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.174. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.102. | Factory-verified |
| 1SL | Equipment group: Z71 Off-Road | 2005 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.174. | Factory-verified |
| 1SS | Equipment group: Silverado SS | 2003, 2005–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.191. GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.111. GM Heritage factory kit — 2006 Chevrolet Silverado, p.293. GM Heritage factory kit — 2007 Chevrolet Silverado, p.219. | Factory-verified |
| 1SW | Equipment group: Work Truck | 2003, 2005 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.191. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.174. | Factory-verified |
| 1WT | Equipment group: Work Truck (1WT) | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.248. GM Heritage factory kit — 2007 Chevrolet Silverado, p.234. | Factory-verified |
| 2LS | Equipment group: LS (2LS) | 2006–2007 | the 2007 order guide offers it on C*15543 crew cab models GM Heritage factory kit — 2006 Chevrolet Silverado, p.234. GM Heritage factory kit — 2007 Chevrolet Silverado, p.234. | Factory-verified |
| 2LT | Equipment group: LT2 (2LT) | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.236. GM Heritage factory kit — 2007 Chevrolet Silverado, p.234. | Factory-verified |
| 3LT | Equipment group: LT3 (3LT) | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.231. GM Heritage factory kit — 2007 Chevrolet Silverado, p.234. | Factory-verified |
| B2E | Special edition package (spring special / Silverado Limited Edition) | 2005–2007 | 2006–2007 lists: spring special; the 2005 order guide names it Silverado Limited Edition GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| B4U | Silverado SS package (sport performance) | 2003–2007 | the 2003 and 2005 Silverado SS order guides list it as Silverado SS GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| B4V | Performance Edition package (high-output engine) | 2005–2007 | the 2005 order guide names it Silverado Performance Edition GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| BPH | Off Road appearance package (Chevrolet) | 2001–2002, 2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| EM7 | Enhanced mobility package (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| NHT | Enhanced towing performance package | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NZZ | Skid plate package (off-road) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| PDB | Safe and Sound package (includes XM Satellite Radio) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.130. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. GM Heritage factory kit — 2007 Chevrolet Silverado, p.301. | Factory-verified |
| SLT | LT sales package (Chevrolet) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| U42 | Rear seat entertainment package | 2003–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| V10 | Cold climate package | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2006 Chevrolet Silverado, p.68. | Factory-verified |
| VYU | Snow plow prep package | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| WT1 | Exterior appearance package 1 | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| X81 | Price leader pickup package | 1999 | Factory-verified | |
| Y91 | Luxury Edition package | 2001, 2003–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| YE9 | Comfort and decor level 3 (uplevel decor) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| YF2 | Ambulance upfitter package | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| YF7 | Upfitter package | 1999–2000 | Factory-verified | |
| Z60 | High-performance chassis package | 2003–2007 | the Silverado SS suspension in the 2003 and 2005 SS order guides GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.208. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| Z71 | Off-road chassis package (Z71) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| Z83 | Solid smooth ride suspension package | 1999–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| Z85 | Handling/trailering (increased capacity) suspension package | 1999–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| ZE5 | Trim level, base (export) | 1999–2000 | Factory-verified | |
| ZM9 | Features enhancement package | 1999–2000 | Factory-verified | |
| ZQ1 | Smooth ride chassis package | 2001 | Factory-verified | |
| ZW7 | Premium smooth ride chassis package | 2001 | Factory-verified | |
| ZX3 | Selectable ride control (manual select damping) suspension package | 1999–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| Equipment | ||||
| 2GA | Tire, front (SEO): P245/75R16 109S, all-terrain, blackwall | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 3GA | Tire, rear (SEO): P245/75R16 109S, all-terrain, blackwall | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 4GA | Tire, spare (SEO): P245/75R16 109S, all-terrain, blackwall | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 4GK | Spare tire, LT245/75R16E on/off-road, blackwall (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.127. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. GM Heritage factory kit — 2007 Chevrolet Silverado, p.300. | Factory-verified |
| 5B5 | Power windows and mirrors (SEO) | 2001, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 5G4 | Provisions for cab roof-mounted lamp (SEO) | 2001, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.269. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 5GA | Tires, all (SEO): P245/75R16 109S, all-terrain, blackwall | 2001 | Factory-verified | |
| 5M1 | Mirrors, outside, power, manual folding, non-heated (SEO) | 2005, 2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| 5M5 | Transmission equipment, manual (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 5S3 | Engine equipment, 4.3L V6 (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 5T5 | Seat override (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 5V1 | Spare wheel carrier without tire (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 5X7 | Provisions for body-mounted warning lamp (SEO) | 2001, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 5X9 | Provisions, wrecker preparation (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 5Y0 | Wiring provisions for body-builder emergency lamp (SEO) | 2001, 2005, 2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 5Z4 | Spare wheel and tire, delete (SEO) | 2005, 2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 6C7 | Dome / reading lamps, passenger (roof console with reading lamps) | 2001, 2005–2007 | the 2005 order guide gives a roof console with reading lamps GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 6E2 | Single-key lock cylinders, coded DF81 (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 6E8 | Single-key lock cylinders, coded NU97 (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 6P3 | Mirrors, camper style, power remote, extendable, non-heated (SEO) | 2005, 2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 7T6 | Fuel line take-off fitting (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 7Y9 | Battery, single 770 CCA (SEO) | 2001, 2005, 2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 7Z1 | Horn, high note (SEO) | 2001, 2005 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. | Factory-verified |
| 8A7 | Alternator, 130 amp (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8B0 | Batteries, 770 CCA and 600 CCA (dual) (SEO) | 2001, 2005–2006 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.269. | Factory-verified |
| 8E8 | Bumper, front, painted black (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8E9 | Bumper, front, painted white (SEO) | 2001, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.269. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 8F2 | Exterior ornamentation, delete (upfitter) (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| 8F6 | Exterior ornamentation, uplevel, shipped loose (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8G9 | Mirrors, outside, wide-loop, stainless steel (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8S3 | Back-up alarm, 97 dB (SEO) | 2001, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 8S8 | Wiring provisions, odometer security (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8T7 | Front axle half-shaft protective boot/cover (4WD) (SEO) | 2001, 2005, 2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 8V2 | Jack and tools, delete (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| 8X5 | Alternators, dual 105 amp (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8Y8 | Batteries, dual 600 CCA (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8Y9 | Batteries, dual 770 CCA (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 9F8 | Mirrors, outside, wide load, large (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 9L3 | Spare tire, delete (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 9L4 | Power supply, 12-volt (SEO) | 2001, 2005, 2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 9M4 | Tailgate decal, delete (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| 9N8 | Mirrors, auxiliary outside spot, 6 in convex, stainless steel (SEO) | 2001 | Factory-verified | |
| 9P2 | Air conditioning, rear, with auxiliary heater (SEO) | 2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it | Factory-verified |
| 9R0 | Radio, AM/FM stereo with cassette and clock, no CD (SEO) | 2005–2006 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. | Factory-verified |
| 9R1 | Pickup box decal, delete (SEO) | 2005, 2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 9R3 | Sound system, delete (SEO) | 2005–2006 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. | Factory-verified |
| 9S1 | Seats, individual, vinyl (SEO) | 2005–2006 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. | Factory-verified |
| 9U3 | Seats, individual, cloth (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 9U4 | Keyless entry, remote (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.261. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| 9X5 | Trim override, custom cloth (SEO) | 2005 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. | Factory-verified |
| A04 | Windshield, tinted, without upper shadeband | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| A28 | Window, rear, sliding | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.127. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| A31 | Windows, power | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| A95 | Seats, front buckets, high back, reclining | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| AC6 | Glass, deep tint, rear side doors | 2003 | Factory-verified | |
| AC7 | Fuel tank fill pipe vent, unrestricted | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| AE7 | Seats, front 40/20/40 split bench | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AG1 | Seat adjuster, power, driver (6-way) | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AG2 | Seat adjuster, power, passenger (6-way) | 1999–2007 | the 1999 list repeats AG1's driver wording; 2000 and later lists give the passenger seat GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AJ1 | Glass, deep tint (all windows except windshield and front doors) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AK6 | Air bag delete (international, CKD only) | 1999 | Factory-verified | |
| AL0 | Passenger presence / child presence sensor (front passenger air bag) | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| AL4 | Seats, rear, two buckets | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. | Factory-verified |
| AM7 | Seat, rear, folding | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AN2 | Child seat, integral | 1999 | Factory-verified | |
| AN3 | Seats, front, full-feature individual seats | 1999–2007 | 2001–2007 lists word it as individual (non-bucket) seats GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| ANJ | Glass, tinted, non-deep (export, E-marked) | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. | Factory-verified |
| APF | Troop seats with canvas top (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| AT5 | Seat, rear, folding center/second seat | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. | Factory-verified |
| AU0 | Keyless entry, remote | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AU3 | Door locks, power | 1999–2001, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| AU8 | Remote function actuation, specific frequency | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| AX4 | Seats and restraints, European conversion | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| B30 | Floor covering, carpet | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| B32 | Floor mats, front, auxiliary | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| B33 | Floor mats, rear, auxiliary | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| B34 | Floor mats, front, carpeted insert | 1999–2000, 2003–2004 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| B35 | Floor mats, rear, carpeted insert | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| B37 | Floor mats, front and rear (intermediate), auxiliary | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| B39 | Floor covering, carpeted load floor / cargo mat | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| B58 | Floor mats, front and rear, carpeted insert | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| B71 | Wheel opening flares | 1999–2001, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| B74 | Wheel opening flares, extra wide | 1999–2000 | Factory-verified | |
| B81 | Moldings, bodyside, delete | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| B82 | Exterior emblem, delete | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| B85 | Moldings, bodyside, bright | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| B96 | Moldings, wheel opening | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| BA5 | Exterior ornamentation, custom | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| BD2 | Exterior ornamentation, delete | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| BG9 | Floor covering, rubber | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| BNA | Battery, Optima (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| BNB | Exterior trim, paintable (international) | 1999 | Factory-verified | |
| BS1 | Acoustical insulation package | 2001, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| BVE | Running boards / assist steps, chrome tubular | 2001, 2004–2007 | the 2005 order guides describe it as chrome tubular assist steps (accessory) GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2006 Chevrolet Silverado, p.250. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| BVF | Running boards, color-keyed | 2001–2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| BVS | Running boards / assist steps, color (black) | 2004–2007 | the 2005 order guides describe black-coated tubular assist steps (accessory) GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2006 Chevrolet Silverado, p.250. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| BVU | Assist steps (accessory) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2006 Chevrolet Silverado, p.270. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| BW1 | Exterior ornamentation, rear end | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. | Factory-verified |
| BW2 | Moldings, bodyside, deluxe | 2001, 2003–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| C25 | Rear window wiper, intermittent | 2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. | Factory-verified |
| C36 | Heater, auxiliary | 2001–2002 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| C3J | GVW rating, 6,700 lb | 2003–2004, 2006–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. GM Heritage factory kit — 2006 Chevrolet Silverado, p.270. GM Heritage factory kit — 2007 Chevrolet Silverado, p.259. | Factory-verified |
| C42 | Heater, outside air, deluxe | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C49 | Defogger, rear window, electric | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C4M | GVW rating, 9,900 lb | 2004–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C52 | GVW rating, 7,200 lb | 2000 | Factory-verified | |
| C5F | GVW rating, 8,500 lb | 2001–2005 | 2005: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| C5H | GVW rating, 6,900 lb | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| C5M | GVW rating, 6,100 lb | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| C5P | GVW rating, 6,250 lb | 1999–2000 | Factory-verified | |
| C5Q | GVW rating, 6,300 lb | 1999–2000 | Factory-verified | |
| C5S | GVW rating, 6,600 lb | 1999–2000, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| C5U | GVW rating, 6,800 lb | 1999–2002, 2004–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2006 Chevrolet Silverado, p.270. GM Heritage factory kit — 2007 Chevrolet Silverado, p.260. | Factory-verified |
| C5W | GVW rating, 7,000 lb | 2001, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| C5Z | GVW rating, 7,200 lb | 2001, 2003–2004 | Factory-verified | |
| C60 | Air conditioning, front, manual controls | 1999–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| C68 | Air conditioning, front, automatic electronic climate control | 1999–2001 | Factory-verified | |
| C69 | Air conditioning, rear | 2000–2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it | Factory-verified |
| C6P | GVW rating, 8,600 lb | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C6U | GVW rating, 9,000 lb | 1999–2000 | Factory-verified | |
| C6W | GVW rating, 9,200 lb | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2006 Chevrolet Silverado, p.64. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C6Y | GVW rating, 9,600 lb | 2006–2007 | only in: heavy-duty models (GM’s HD list: 1500HD, 2500HD, 3500) GM Heritage factory kit — 2006 Chevrolet Silverado, p.64. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C7A | GVW rating, 10,000 lb | 1999–2000 | the 1999 list also prints C7A against 11,000 lb; the 2000 list gives 11,000 lb as C7E | Factory-verified |
| C7E | GVW rating, 11,000 lb | 2000 | Factory-verified | |
| C7H | GVW rating, 6,400 lb | 2001–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| C7K | GVW rating, 6,500 lb | 2001, 2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| C7L | GVW rating, 12,000 lb | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C7W | GVW rating, 11,400 lb | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2006 Chevrolet Silverado, p.64. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| C85 | Fog lamps, suppressed when headlamps are on (export) | 1999–2001 | Factory-verified | |
| C86 | Manual transmission shift indicator lamp (tell-tale) suppression | 2001, 2003–2004 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| CF5 | Sunroof, power, sliding glass | 1999–2003, 2005–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.54. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| CJ2 | Air conditioning, dual-zone automatic | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| CJ3 | Air conditioning, dual-zone manual | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| D07 | Console, floor, front compartment (custom) | 1999–2001, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| D31 | Mirror, inside rearview, tilt | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| D44 | Mirrors, outside, base (color/black) | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| D45 | Mirrors, outside, chrome gooseneck style | 1999–2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. | Factory-verified |
| D48 | Mirrors, outside, power remote control | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| D55 | Console, floor, seat separator | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| DD7 | Mirror, inside rearview, electrochromic auto-dimming with compass | 1999–2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. | Factory-verified |
| DE2 | Mirrors, outside, manual, folding | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DF2 | Mirrors, outside, wide load (camper style), folding, stainless steel | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DF5 | Mirror, inside rearview, auto-dimming with compass and outside temperature display | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DG5 | Mirrors, outside, wide load, large (West Coast style) | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list); the 1999 list repeats DF5's temperature-readout wording for DG5 GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DH2 | Sunshades with illuminated vanity mirrors (dual sunshade) | 2001–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| DH6 | Sunshades with illuminated vanity mirrors, driver and passenger | 1999–2000, 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| DJ5 | Mirror, outside, electrochromic | 1999 | Factory-verified | |
| DK2 | Mirrors, outside, power, heated, color | 2001–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| DK6 | Console, overhead (bucket seat, long) | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| DK7 | Console, overhead (custom) | 2000–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DK8 | Console, overhead (deluxe) | 2001, 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.127. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DL3 | Mirrors, outside, power, heated, power folding, turn signal, driver auto-dimming | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DL8 | Mirrors, outside, power, heated | 1999–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DNH | Storage box, rear underseat | 2003, 2005–2007 | 2005: in GM’s heavy-duty list only, but the 1500/SS order guide lists it; the 2006–2007 lists misprint Rear as Right GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DP1 | Mirror provisions, convex glass | 2001 | Factory-verified | |
| DPF | Mirrors, outside, wide load (camper style), power, heated | 2003–2005 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. | Factory-verified |
| DPN | Mirrors, outside, wide load, vertical glass, manual extending and folding, heated, power, turn signal | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| DR2 | Mirrors, outside, power, heated, auto-dimming, manual folding | 2001 | Factory-verified | |
| DT4 | Ashtray and cigarette lighter | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| E35 | Pickup box, steel (optional) | 1999–2000 | Factory-verified | |
| E36 | Pickup box, composite, light color | 1999 | Factory-verified | |
| E37 | Pickup box, composite inner, dark color | 1999, 2001–2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2004 Chevrolet Silverado, p.65. | Factory-verified |
| E62 | Pickup box, Sportside (Step Side) | 1999–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| E63 | Pickup box, Fleetside (Wideside) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| E95 | Tonneau cover | 2001–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| EN6 | Tonneau cover, hard, folding | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.127. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.197. GM Heritage factory kit — 2006 Chevrolet Silverado, p.270. GM Heritage factory kit — 2007 Chevrolet Silverado, p.276. | Factory-verified |
| EQ9 | Underride protection equipment | 2000–2001, 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| ESC | Individual front seats with floor console provisions | 2003–2004 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2004 Chevrolet Silverado, p.65. | Factory-verified |
| F44 | Chassis, heavy-duty | 1999 | Factory-verified | |
| F60 | Springs, front, heavy-duty (increased torsion bar rate) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| FF4 | Torsion bar adjuster, left (C) | 2002, 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.65. | Factory-verified |
| FF5 | Torsion bar adjuster, right (D) | 2002, 2004 | Factory-verified | |
| FF6 | Torsion bar adjuster, left (E) | 2002, 2004 | Factory-verified | |
| FF7 | Torsion bar adjuster, right (F) | 2002, 2004 | Factory-verified | |
| FF8 | Torsion bar adjuster, left (G) | 2004 | Factory-verified | |
| FF9 | Torsion bar adjuster, right (H) | 2004 | Factory-verified | |
| FK2 | Torsion bar adjuster, left (A) | 2002, 2004 | Factory-verified | |
| FK3 | Torsion bar adjuster, right (B) | 2002, 2004 | Factory-verified | |
| FNF | Power take-off (PTO) provisions, front | 2004 | Factory-verified | |
| FRL | Springs, increased rate (provisions) | 1999–2000 | Factory-verified | |
| FT2 | Torsion bar adjuster, left (FT2) | 2002, 2004 | Factory-verified | |
| FT3 | Torsion bar adjuster, right (FT3) | 2002, 2004 | Factory-verified | |
| FW1 | Ride and handling, manual electric control | 2000–2004 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| G63 | Provisions, roof luggage carrier | 2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it | Factory-verified |
| G65 | Level control, manual, self-adjusting | 2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it | Factory-verified |
| G69 | Level control, automatic air, heavy-duty | 2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it | Factory-verified |
| GEC | GVW rating, 9,800 lb | 2006–2007 | only in: heavy-duty models (GM’s HD list: 1500HD, 2500HD, 3500) GM Heritage factory kit — 2006 Chevrolet Silverado, p.65. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| HP2 | Hybrid propulsion system, electric, parallel (14V/42V, 120V outlets, idle engine stop) | 2004–2007 | 2005–2007 lists word it as AHS2 GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| HVY | Identification, 2 in body raise (HD model) | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| J81 | Fog lamp / indicator switch, export | 1999–2003 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| JB8 | Brakes, hydroboost (export) | 1999–2000 | Factory-verified | |
| JC3 | Brakes, vacuum power, 4-wheel disc, 6,400 lb | 2003–2005 | 2005: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| JC4 | Brakes, vacuum power, 4-wheel disc, 7,200 lb | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| JC5 | Brakes, vacuum power, 4-wheel disc, 7,200 lb | 1999–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| JE1 | Brake system, Europe | 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| JF3 | Brakes, vacuum power, 17 in disc/drum with ABS, 7,000 lb | 2005–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| JF4 | Brakes, vacuum power, 17 in disc/drum with ABS, 6,400 lb | 2006–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| JF7 | Brakes, vacuum power, 17 in disc/drum with ABS, 6,400 lb | 2005 | Factory-verified | |
| JH1 | Brakes, hydraulic power, 4-wheel disc, 6,400 lb | 2004–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| JH5 | Brakes, hydraulic (hydroboost) power, 4-wheel disc, 7,200 lb | 1999, 2001–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| JH6 | Brakes, hydraulic power, 4-wheel disc, 9,900 lb | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| JH7 | Brakes, hydraulic power, 4-wheel disc, 12,000–12,300 lb | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list); 1999–2000 lists tie it to dual rear wheels (R05); 2003–2007 lists give 12,300 lb GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| JL4 | Active brake control | 2004 | Factory-verified | |
| JVA | Antilock brakes, delete | 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| K05 | Engine block heater | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| K18 | Air injection reactor (AIR) pump, electric | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. | Factory-verified |
| K34 | Cruise control | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| K47 | Air cleaner, high-capacity | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| K53 | Fuel sender, robust fuel system (international) | 1999–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| K65 | Alternators, dual 105 amp | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| K68 | Alternator, 105 amp | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| KC4 | Engine oil cooler, heavy-duty | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| KC5 | Accessory electrical receptacle | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. | Factory-verified |
| KC6 | Provisions, accessory device | 2000 | Factory-verified | |
| KG3 | Alternator, 145 amp | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| KG8 | Alternator, 130 amp | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| KL5 | Engine modification, natural gas (conversion-ready engine) | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| KL6 | Provisions, natural gas | 2001–2006 | 2005: heavy-duty models only (GM’s HD list); the CNG/LPG supplement lists (2001–2006) word it as a bi-fuel CNG gaseous fuel package; 2001–2002, 2006 only in those lists GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| KL7 | Conversion, propane (LPG) | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. | Factory-verified |
| KL8 | Conversion, natural gas (CNG) | 2001–2006 | 2005: heavy-duty models only (GM’s HD list); the 2001 list says propane but marks it CNG; KL7 is the propane conversion; the CNG/LPG supplement lists (2001–2006) word it as a dedicated CNG gaseous fuel package; 2002, 2006 only in those lists GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.46. | Factory-verified |
| KNP | Transmission oil cooler, heavy-duty (auxiliary) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| KUP | Throttle control, electronic | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| KW1 | Alternator, 160 amp | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.55. | Factory-verified |
| KXB | Alternators, dual 100 amp | 1999 | Factory-verified | |
| M1F | Power take-off (PTO) provisions, rear | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| MNB | Military upfit (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| MTF | Provisions, fire extinguisher mounting | 2004–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| N05 | Fuel filler cap, locking | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| N12 | Exhaust, rear exit | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| N88 | Wheels, 17 x 7.5 aluminum, premium | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. | Factory-verified |
| N93 | Wheels, 17 x 7.5 aluminum | 2000–2001, 2003–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NK5 | Steering wheel, standard | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NP5 | Steering wheel, leather-wrapped | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NP7 | Steering column, EEC approved | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. | Factory-verified |
| NPL | Nameplate, delete | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| NQY | Fuel tank, auxiliary, rear-mounted, 20 gallon | 1999 | Factory-verified | |
| NQZ | Fuel tank, auxiliary, rear-mounted, 18 gallon, delete | 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NW7 | Traction control | 2000–2007 | 2003–2007 lists: powertrain management only GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NYS | Four-wheel steering (Quadrasteer) | 2002–2006 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2006 Chevrolet Silverado, p.260. | Factory-verified |
| P03 | Wheel covers / hub caps, bright | 1999–2001, 2003–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2006 Chevrolet Silverado, p.67. | Factory-verified |
| P06 | Wheel trim rings with bright hub caps | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2006 Chevrolet Silverado, p.67. | Factory-verified |
| P25 | Wheels, 17 x 7.5 aluminum, premium 5-spoke | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| P27 | Wheels, 17 x 7.5 aluminum, premium 6-spoke | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| P30 | Wheels, 20 x 8.5 aluminum, sport | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| P35 | Wheels, 20 x 8.5 chrome | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| PF4 | Wheels, 16 x 7 aluminum | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| PF9 | Wheels, 16 x 7 cast aluminum | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| PPB | Pickup box extender | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2006 Chevrolet Silverado, p.279. GM Heritage factory kit — 2007 Chevrolet Silverado, p.277. | Factory-verified |
| PTO | Engine controls for power take-off (PTO) | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| PUB | Pickup box rail caps / protectors | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2006 Chevrolet Silverado, p.270. GM Heritage factory kit — 2007 Chevrolet Silverado, p.277. | Factory-verified |
| PUC | Pickup cap with bumper-mounted swing-away spare tire carrier (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| PY0 | Wheels, 16 x 6.5 aluminum | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| PY2 | Wheels, 16 x 6.5 chrome appearance | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| PY9 | Wheels, 17 x 7.5 chrome appearance | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| Q4B | GVW rating, 6,200 lb | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| QAN | Tires, all: P265/70R17 113S, all-season, blackwall | 2000–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QAQ | Tires, all: P265/70R17 113H, all-season, blackwall | 2005–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QBL | Tires, all: P265/70R17 113H, on/off-road, blackwall | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QBN | Tires, all: LT245/75R16C, on/off-road, blackwall | 1999–2003 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. | Factory-verified |
| QBX | Tires, all: LT245/75R16C, on/off-road, white outline lettered | 1999–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QC1 | Wheels, 16 x 7 steel | 2004–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QC3 | Wheels, 16 x 7 aluminum, special | 1999–2003 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. | Factory-verified |
| QC4 | Wheels, 16 x 7 aluminum, custom | 2003–2004 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QC5 | Wheels, 17 x 7 aluminum | 1999 | Factory-verified | |
| QCC | Tires, all: P255/70R16, all-season, blackwall | 1999–2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QCJ | Tires, all: P255/70R16, all-season, white outline lettered | 1999, 2001–2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.56. GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QCP | Tires, all: P255/70R16 109H, all-season, blackwall | 2001–2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QE4 | Wheel, spare, 16 x 6.5 aluminum | 1999–2001, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QER | Tires, all: LT265/75R16E, on/off-road, blackwall | 2004–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QF7 | Wheels, 17 x 7.5 aluminum, deluxe | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QGA | Tires, all: P245/75R16 109S, all-terrain, blackwall | 1999–2002 | the 1999 list prints P255/75R16, a size the later lists do not use GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QGB | Tires, all: P245/75R16 109S, all-terrain, white outline lettered | 1999–2002 | the 2001 list prints P265/75R16 109S; 1999–2000 and 2002 give P245/75R16 GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QGC | Tires, all: P265/75R16 114S, all-terrain, blackwall | 1999–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QGD | Tires, all: P265/75R16 114S, all-terrain, white outline lettered | 1999–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QHP | Tires, all: LT225/75R16D, all-season, blackwall | 1999–2000 | Factory-verified | |
| QHS | Tires, all: P265/75R16 114H, temperature grade A, all-terrain, blackwall | 1999–2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QHT | Tires, all: P265/75R16 114S, temperature grade A, all-terrain, white outline lettered | 1999 | Factory-verified | |
| QIW | Tires, all: LT245/75R16E 120Q, on/off-road, blackwall | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. | Factory-verified |
| QIX | Tires, all: LT265/75R16C or LT245/75R16C 120Q, on/off-road, blackwall | 2001, 2003 | the lists disagree on the size: the 2001 list reads LT265/75R16C (as does the GMT Central decoder), the 2003 list LT245/75R16C GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. | Disputed |
| QIZ | Tires, all: LT245/75R16E 120Q, all-season, blackwall | 1999–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. | Factory-verified |
| QJM | Tires, all: P265/70R17 113S, on/off-road, white outline lettered | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QJP | Tires, all: P265/70R17 113S, on/off-road, blackwall | 2001–2002, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QLP | Tires, all: LT245/75R16E 120/116S, all-season, blackwall | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.67. | Factory-verified |
| QMG | Tires, all: P245/75R16 112S extra load, all-season, blackwall | 1999–2000 | the 1999 list's QMG and QMH lines read one code down (WOL, then P265/70R16); its front/rear/spare codes XMG, YMG and ZMG match the 2000 reading | Factory-verified |
| QMH | Tires, all: P245/75R16 112S extra load, all-season, white outline lettered | 1999–2000 | see QMG: the 1999 list prints P265/70R16 AL2 against QMH | Factory-verified |
| QMJ | Tires, all: P265/70R16 111S, all-season, blackwall | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QMK | Tires, all: P265/70R16 111S, all-season, white outline lettered | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| QNF | Tires, all: P235/75R16 106S, all-season, blackwall | 1999–2002, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. | Factory-verified |
| QNG | Tires, all: P235/75R16 106S, all-season, white outline lettered | 1999–2002, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QNK | Tires, all: P245/75R16 109S, all-season, blackwall | 1999–2002, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| QNL | Tires, all: P245/75R16 109S, all-season, white outline lettered | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QNM | Tires, all: P245/70R17 108H, all-season, blackwall | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| QPO | Tires, all: P245/70R17 108S, all-season, white outline lettered | 2005–2007 | Factory-verified | |
| QPR | Tires, all: P245/70R17 108S, all-season, blackwall | 2005–2007 | Factory-verified | |
| QR9 | Wheels, 20 x 8.5 cast aluminum, chromed, 5-spoke | 2005–2007 | Factory-verified | |
| QS8 | Wheels, 20 x 8.5 cast aluminum, chromed, 7-spoke | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| QSS | Tires, all: P275/55R20 111S, all-season, blackwall | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.130. | Factory-verified |
| QVL | Tires, all: P265/70R17 113S, all-season, blackwall | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| QVM | Tires, all: P265/70R17 113S, all-season, white outline lettered | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| QXR | Tires, all: LT245/70R17C, all-terrain, blackwall | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| R4W | Tire brand, all Michelin | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| R4Y | Tire brand, all Goodyear | 2001, 2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. | Factory-verified |
| R5C | Tire brand, all Bridgestone | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. | Factory-verified |
| SAF | Spare tire lock | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2006 Chevrolet Silverado, p.62. | Factory-verified |
| SRW | Chassis, single rear wheel ride and handling | 2004–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| T07 | Alternator, delete | 2004–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| T2H | Exterior ornamentation, export requirements | 2001, 2003–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| T2J | Interior ornamentation, export requirements | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| T62 | Daytime running lamps, delete | 1999–2000, 2002–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| T64 | Battery, delete | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| T65 | Daytime running lamps, export (European) | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| T74 | Headlamp control, automatic with delay | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| T78 | Headlamp control (automatic), delete | 1999, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| T79 | Fog lamp, rear | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| T84 | Headlamps, right-hand rule of road, E-marked (export) | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. | Factory-verified |
| T89 | Tail and stop lamps, export | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| T90 | Signal and marker lamps (export) | 1999–2000 | Factory-verified | |
| T96 | Fog lamps, front | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| T9H | Provisions, front fog lamps | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| TL1 | Grille, special | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| TP2 | Battery, auxiliary (dual battery provisions) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| TQ3 | Batteries, dual 770 CCA | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| TR2 | Turn signal lamps, side repeater / enlarged (export) | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| TR3 | Grille, body color with chrome emblem / chrome surround | 2003–2007 | the 2005 1500HD order guide gives a chrome-surround grille GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| TR6 | Headlamp leveling, manual | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| TRB | Provisions, roof-mounted lamp | 2001 | the 2001 list and its kit reprint give TRB the same wording as TRW; the 2002–2007 lists use TRB for a body-color grille GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Disputed |
| TRB | Grille, body color | 2002–2007 | the 2001 list prints another wording (see the 2001 row); the Silverado SS order guides call it a color-keyed grille GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| TRW | Provisions for roof-mounted (emergency) lamps | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| TS9 | High-mounted stop lamp, delete | 1999–2000, 2004–2005 | 2005: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. | Factory-verified |
| U01 | Roof marker lamps (five) | 2000–2001, 2003–2007 | the 2000–2001 lists print it with a letter O (UO1) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| U19 | Speedometer, kilometers and miles, kilometer odometer | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| U1S | Multiple CD player (changer) | 2003–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| U1Z | Multiple CD player (changer), passenger compartment | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| U2J | XM Satellite Radio (S-band), not installed | 2006–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| U2K | XM Satellite Radio (S-band digital audio) | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| U2L | Digital audio system, L-band | 2003 | Factory-verified | |
| U34 | Temperature display, Celsius | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| U68 | Driver information center (trip computer) | 2000–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| UB0 | Radio, AM/FM stereo, CD, auto tone control, RDS, clock | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UB1 | Radio, AM/FM stereo, cassette and CD, auto tone control, RDS, clock | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UB2 | Radio, AM/FM stereo, cassette and multiple-CD changer, auto tone control, clock | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| UB8 | Horn, high note | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| UC2 | Speedometer, kilometers and miles, kilometer odometer, positive bias (European) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UC6 | Radio, AM/FM stereo, 6-disc CD changer, RDS, auto tone control, clock | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UD4 | Vehicle speed alarm, 120 km/h (overspeed warning) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UD7 | Rear parking assist | 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| UE1 | OnStar communication system (GPS) | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UG1 | Universal garage door opener (HomeLink) | 1999–2001, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| UJ6 | Low tire pressure indicator | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.62. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UK3 | Steering wheel radio (accessory) controls | 2001, 2003–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UK6 | Rear seat radio controls with earphone jacks | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UL0 | Radio, AM/FM stereo with cassette (European) | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| UL1 | Radio, AM/FM stereo, seek/scan, clock (European frequencies) | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| UL2 | Radio frequencies, European | 1999–2001, 2003, 2005–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| UL4 | Radio frequencies, South American | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UL5 | Radio, delete | 1999–2000, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UL8 | Radio frequencies, Saudi Arabian | 2003–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UL9 | Radio, AM/FM stereo, cassette and CD, auto tone control, clock, Bose | 2001–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| UM6 | Radio, AM/FM stereo, seek/scan, auto-reverse cassette, clock | 1999–2001 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2001 Chevrolet Silverado, p.57. | Factory-verified |
| UM7 | Radio, AM/FM stereo, seek/scan, clock (base) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UN0 | Radio, AM/FM stereo, seek/scan, CD, auto tone control, clock | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| UP0 | Radio, AM/FM stereo, seek/scan, cassette and CD, auto tone control, clock | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| UQ3 | Speaker system, performance (enhanced audio) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UQ5 | Speaker system, base (four speakers) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UQ7 | Speaker system, premium, Bose | 2000–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UQ9 | Speaker system, delete | 2003–2007 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UV8 | Cellular phone provisions (wiring) | 1999–2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. | Factory-verified |
| UW3 | Radio, AM/FM stereo with Radio Data System (RDS), cassette | 1999–2002 | the 1999–2000 lists word it as an RDS feature with European frequencies GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| UY2 | Wiring provisions, camper and fifth-wheel trailer | 1999–2007 | the 2005 light-duty list gives UY2 another wording (see the disputed row) GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.179. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| UY2 | Power and signal distribution, power outlets | 2005 | only the 2005 light-duty list reads UY2 this way; the same file's heavy-duty list and the 2005 1500 order guide give camper and fifth-wheel trailer wiring GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.179. | Disputed |
| UY7 | Wiring harness, trailer, heavy-duty | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| V08 | Cooling, heavy-duty | 1999 | Factory-verified | |
| V22 | Grille, chrome | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| V43 | Bumper, rear step, painted | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| V53 | Luggage carrier, roof | 2000–2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| V54 | Luggage carrier, roof-mounted | 2000–2001 | in GM's shared truck and utility list only; no Silverado pickup order guide or other source shows it GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| V76 | Tow hooks, front | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| V92 | Trailer provisions | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| VB3 | Bumper, rear step, chrome with impact strip | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VB5 | Bumper, front, color | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| VCG | Provisions, international switch/control symbols | 2005–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| VF1 | Bumper, front, painted steel, primed | 2003, 2005–2007 | the Silverado SS order guides read it as an integrated front bumper with color-keyed fascia GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| VF3 | Bumper, rear, painted steel, primed | 2003, 2005–2007 | the Silverado SS order guides read it as an integrated rear bumper with color-keyed fascia GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.208. GM Heritage factory kit — 2007 Chevrolet Silverado, p.57. | Factory-verified |
| VF7 | Bumper, rear step, delete | 1999–2000, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VFF | Video format, region 1 NTSC | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VFJ | Video format, region 2 PAL | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VFM | Video format, region 4 NTSC | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VFP | Video format, region 5 PAL | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VG3 | Bumper, front, chrome with impact strip | 1999–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VK3 | Front license plate mounting package | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VP6 | Noise control | 2001–2002, 2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VR4 | Trailer hitch, weight-distributing platform | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| VR7 | Tow hook, second, rear (recovery) | 1999–2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| VSP | Pickup box, dual rear wheels | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VT4 | Bumper, front, color-keyed | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| VT5 | Bumper, rear, color-keyed | 2001–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| XAN | Tire, front: P265/70R17 113S, all-season, blackwall | 2001–2002, 2004 | Factory-verified | |
| XAQ | Tire, front: P265/70R17 113H, all-season, blackwall | 2002 | Factory-verified | |
| XBN | Tire, front: LT245/75R16C, on/off-road, blackwall | 1999–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| XBX | Tire, front: LT245/75R16C, on/off-road, white outline lettered | 1999–2002, 2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| XCC | Tire, front: P255/70R16, all-season, blackwall | 1999–2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| XCJ | Tire, front: P255/70R16, all-season, white outline lettered | 1999, 2001–2002, 2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| XCP | Tire, front: P255/70R16 109H, all-season, blackwall | 2001–2002, 2004 | Factory-verified | |
| XEC | Tire, front: LT215/85R16E, highway, blackwall | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| XEF | Tire, front: LT215/85R16E, on/off-road, blackwall | 2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| XER | Tire, front: LT265/75R16E, on/off-road, blackwall | 2004 | Factory-verified | |
| XGA | Tire, front: P245/75R16 109S, all-terrain, blackwall | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| XGB | Tire, front: P245/75R16 109S, all-terrain, white outline lettered | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| XGC | Tire, front: P265/75R16 114S, all-terrain, blackwall | 1999–2002, 2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| XGD | Tire, front: P265/75R16 114S, all-terrain, white outline lettered | 1999–2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. | Factory-verified |
| XGK | Tire, front: LT245/75R16E 120Q, on/off-road, blackwall | 2001–2002, 2004 | Factory-verified | |
| XGL | Tire, front: LT265/75R16C, on/off-road, blackwall | 2000–2002 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. | Factory-verified |
| XHH | Tire, front: LT245/75R16E 120Q, all-season, blackwall | 2001–2002, 2004 | Factory-verified | |
| XHP | Tire, front: LT225/75R16D, all-season, blackwall | 1999–2000 | Factory-verified | |
| XHS | Tire, front: P265/75R16 114H, temperature grade A, all-terrain, blackwall | 1999–2002, 2004 | Factory-verified | |
| XHT | Tire, front: P265/75R16 114S, temperature grade A, all-terrain, white outline lettered | 1999 | Factory-verified | |
| XIW | Tire, front: LT245/75R16E, on/off-road, blackwall | 1999–2000 | Factory-verified | |
| XIZ | Tire, front: LT245/75R16E, all-season, blackwall | 1999–2000 | Factory-verified | |
| XJM | Tire, front: P265/70R17 113S, on/off-road, white outline lettered | 2004 | Factory-verified | |
| XJP | Tire, front: P265/70R17 113S, on/off-road, blackwall | 2001, 2004 | Factory-verified | |
| XLP | Tire, front: LT245/75R16E 120/116S, all-season, blackwall | 2004 | Factory-verified | |
| XMG | Tire, front: P245/75R16 112S extra load, all-season, blackwall | 1999–2000 | Factory-verified | |
| XMH | Tire, front: P245/75R16 112S extra load, all-season, white outline lettered | 1999–2000 | Factory-verified | |
| XMJ | Tire, front: P265/70R16 111S, all-season, blackwall | 1999–2001 | Factory-verified | |
| XMK | Tire, front: P265/70R16 111S, all-season, white outline lettered | 1999–2001 | Factory-verified | |
| XNF | Tire, front: P235/75R16 106S, all-season, blackwall | 1999–2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. | Factory-verified |
| XNG | Tire, front: P235/75R16 106S, all-season, white outline lettered | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| XNK | Tire, front: P245/75R16 109S, all-season, blackwall | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| XNL | Tire, front: P245/75R16 109S, all-season, white outline lettered | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| XSS | Tire, front: P275/55R20 111S, all-season, blackwall | 2004 | Factory-verified | |
| XVL | Tire, front: P265/70R17 113S, all-season, blackwall | 2004 | Factory-verified | |
| XVM | Tire, front: P265/70R17 113S, all-season, white outline lettered | 2004 | Factory-verified | |
| XYK | Tire, front: LT215/85R16D, highway, blackwall | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| XYL | Tire, front: LT215/85R16D, on/off-road, blackwall | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| XYN | Tire, front: LT235/85R16E, all-season, blackwall | 1999–2000 | Factory-verified | |
| YAN | Tire, rear: P265/70R17 113S, all-season, blackwall | 2001–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YAQ | Tire, rear: P265/70R17 113H, all-season, blackwall | 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YB3 | Clutch driven plate, delete | 1999–2000, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| YBN | Tire, rear: LT245/75R16C, on/off-road, blackwall | 1999–2002 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YBX | Tire, rear: LT245/75R16C, on/off-road, white outline lettered | 1999–2002, 2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YCC | Tire, rear: P255/70R16, all-season, blackwall | 1999–2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. | Factory-verified |
| YCJ | Tire, rear: P255/70R16, all-season, white outline lettered | 1999, 2001–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YCP | Tire, rear: P255/70R16 109H, all-season, blackwall | 2001–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YD6 | Spring, rear, base equipment | 2001 | Factory-verified | |
| YEC | Tire, rear: LT215/85R16E, highway, blackwall | 2001, 2004 | Factory-verified | |
| YEF | Tire, rear: LT215/85R16E, on/off-road, blackwall | 2001, 2004 | Factory-verified | |
| YER | Tire, rear: LT265/75R16E, on/off-road, blackwall | 2004 | Factory-verified | |
| YGA | Tire, rear: P245/75R16 109S, all-terrain, blackwall | 1999–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YGB | Tire, rear: P245/75R16 109S, all-terrain, white outline lettered | 1999–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YGC | Tire, rear: P265/75R16 114S, all-terrain, blackwall | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YGD | Tire, rear: P265/75R16 114S, all-terrain, white outline lettered | 1999–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. | Factory-verified |
| YGK | Tire, rear: LT245/75R16E 120Q, on/off-road, blackwall | 2001–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YGL | Tire, rear: LT265/75R16C, on/off-road, blackwall | 2000–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YHH | Tire, rear: LT245/75R16E 120Q, all-season, blackwall | 2001–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YHP | Tire, rear: LT225/75R16D, all-season, blackwall | 1999–2000 | Factory-verified | |
| YHS | Tire, rear: P265/75R16 114H, temperature grade A, all-terrain, blackwall | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YHT | Tire, rear: P265/75R16 114S, temperature grade A, all-terrain, white outline lettered | 1999 | Factory-verified | |
| YIW | Tire, rear: LT245/75R16E, on/off-road, blackwall | 1999–2000 | Factory-verified | |
| YIZ | Tire, rear: LT245/75R16E, all-season, blackwall | 1999–2000 | Factory-verified | |
| YJM | Tire, rear: P265/70R17 113S, on/off-road, white outline lettered | 2004 | Factory-verified | |
| YJP | Tire, rear: P265/70R17 113S, on/off-road, blackwall | 2001, 2004 | Factory-verified | |
| YLP | Tire, rear: LT245/75R16E 120Q, all-season, blackwall | 2004 | Factory-verified | |
| YMG | Tire, rear: P245/75R16 112S extra load, all-season, blackwall | 1999–2000 | Factory-verified | |
| YMH | Tire, rear: P245/75R16 112S extra load, all-season, white outline lettered | 1999–2000 | Factory-verified | |
| YMJ | Tire, rear: P265/70R16 111S, all-season, blackwall | 1999–2001 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| YMK | Tire, rear: P265/70R16 111S, all-season, white outline lettered | 1999–2001 | Factory-verified | |
| YNF | Tire, rear: P235/75R16 106S, all-season, blackwall | 1999–2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YNG | Tire, rear: P235/75R16 106S, all-season, white outline lettered | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YNK | Tire, rear: P245/75R16 109S, all-season, blackwall | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YNL | Tire, rear: P245/75R16 109S, all-season, white outline lettered | 1999–2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| YSS | Tire, rear: P275/55R20 111S, all-season, blackwall | 2004 | Factory-verified | |
| YVL | Tire, rear: P265/70R17 113S, all-season, blackwall | 2004 | Factory-verified | |
| YVM | Tire, rear: P265/70R17 113S, all-season, white outline lettered | 2004 | Factory-verified | |
| YYK | Tire, rear: LT215/85R16D, highway, blackwall | 1999–2001, 2003–2004 | Factory-verified | |
| YYL | Tire, rear: LT215/85R16D, on/off-road, blackwall | 1999–2001, 2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| YYN | Tire, rear: LT235/85R16E, all-season, blackwall | 1999–2000 | Factory-verified | |
| Z5X | Mirror provisions, Arabic language | 1999–2000, 2002–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| Z82 | Trailering provisions, heavy-duty | 1999–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| ZBN | Tire, spare: LT245/75R16C, on/off-road, blackwall | 1999–2001 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| ZBX | Tire, spare: LT245/75R16C, on/off-road, white outline lettered | 1999–2001, 2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| ZCC | Tire, spare: P255/70R16, all-season, blackwall | 1999–2001, 2003–2004 | Factory-verified | |
| ZCJ | Tire, spare: P255/70R16, all-season, white outline lettered | 1999, 2001, 2004 | Factory-verified | |
| ZCP | Tire, spare: P255/70R16 109H, all-season, blackwall | 2001, 2004 | Factory-verified | |
| ZEC | Tire, spare: LT215/85R16E, highway, blackwall | 2001, 2004 | Factory-verified | |
| ZEF | Tire, spare: LT215/85R16E, on/off-road, blackwall | 2001, 2004 | Factory-verified | |
| ZER | Tire, spare: LT265/75R16E, on/off-road, blackwall | 2004 | Factory-verified | |
| ZGA | Tire, spare: P245/75R16 109S, all-terrain, blackwall | 1999–2001 | Factory-verified | |
| ZGB | Tire, spare: P245/75R16 109S, all-terrain, white outline lettered | 1999–2001 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| ZGC | Tire, spare: P265/75R16 114S, all-terrain, blackwall | 1999–2001, 2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| ZGD | Tire, spare: P265/75R16 114S, all-terrain, white outline lettered | 1999–2001, 2003–2004 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| ZGK | Tire, spare: LT245/75R16E 120Q, on/off-road, blackwall | 2001, 2004 | Factory-verified | |
| ZGL | Tire, spare: LT265/75R16C, on/off-road, blackwall | 2000–2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| ZHH | Tire, spare: LT245/75R16E 120Q, all-season, blackwall | 2001, 2004–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.107. GM Heritage factory kit — 2006 Chevrolet Silverado, p.282. GM Heritage factory kit — 2007 Chevrolet Silverado, p.291. | Factory-verified |
| ZHP | Tire, spare: LT225/75R16D, all-season, blackwall | 1999–2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. | Factory-verified |
| ZHS | Tire, spare: P265/75R16 114H, temperature grade A, all-terrain, blackwall | 1999–2001, 2004 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| ZHT | Tire, spare: P265/75R16 114S, temperature grade A, all-terrain, white outline lettered | 1999 | Factory-verified | |
| ZIW | Tire, spare: LT245/75R16E, on/off-road, blackwall | 1999–2000 | Factory-verified | |
| ZIZ | Tire, spare: LT245/75R16E, all-season, blackwall | 1999–2000 | Factory-verified | |
| ZLP | Tire, spare: LT245/75R16E 120/116S, all-season, blackwall | 2004 | Factory-verified | |
| ZMG | Tire, spare: P245/75R16 112S extra load, all-season, blackwall | 1999–2000 | Factory-verified | |
| ZMH | Tire, spare: P245/75R16 112S extra load, all-season, white outline lettered | 1999–2000 | Factory-verified | |
| ZMJ | Tire, spare: P265/70R16 111S, all-season, blackwall | 1999–2001 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| ZMK | Tire, spare: P265/70R16 111S, all-season, white outline lettered | 1999–2001 | Factory-verified | |
| ZNF | Tire, spare: P235/75R16 106S, all-season, blackwall | 1999–2001, 2003–2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.71. | Factory-verified |
| ZNG | Tire, spare: P235/75R16 106S, all-season, white outline lettered | 1999–2001, 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.71. | Factory-verified |
| ZNK | Tire, spare: P245/75R16 109S, all-season, blackwall | 1999–2001, 2004 | Factory-verified | |
| ZNL | Tire, spare: P245/75R16 109S, all-season, white outline lettered | 1999–2001, 2004 | Factory-verified | |
| ZW9 | Base body or chassis (pickup box delete) | 2000–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| ZYK | Tire, spare: LT215/85R16D, highway, blackwall | 1999–2001, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| ZYL | Tire, spare: LT215/85R16D, on/off-road, blackwall | 1999–2001, 2004 | Factory-verified | |
| ZYN | Tire, spare: LT235/85R16E, all-season, blackwall | 1999–2000 | Factory-verified | |
| Paint | ||||
| 01L | Secondary exterior color, special | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.71. | Factory-verified |
| 01U | Primary exterior color, special | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.71. | Factory-verified |
| 15U | Sandstone Metallic (WA929L) | 2005 | the 2006–2007 charts list Sandstone Metallic but print the code joined to its paint number GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.119. | Factory-verified |
| 16L | Graystone Metallic, secondary (two-tone) | 2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. GM Heritage factory kit — 2007 Chevrolet Silverado, p.278. | Factory-verified |
| 16U | Graystone Metallic (WA213M) | 2006–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.284. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 25U | Dark Blue Metallic (WA722J) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.293. | Factory-verified |
| 41U | Black (WA8555) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 46U | Blue Granite Metallic (WA928L) | 2006–2007 | the name is paired with the code by its position in the 2006–2007 color charts (the 2007 chart lists the colors in code order) GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 47U | Dark Green Metallic (WA9539) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 50U | Summit White (WA8624) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 59L | Silver Birch Metallic, secondary (two-tone) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.184. GM Heritage factory kit — 2006 Chevrolet Silverado, p.260. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 59U | Silver Birch Metallic (WA926L) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 62L | Dark Gray Metallic, secondary (two-tone) | 2005 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.184. | Factory-verified |
| 62U | Dark Gray Metallic (WA805K) | 2005 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. | Factory-verified |
| 63U | Sport Red Metallic (WA817K) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.184. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 74U | Victory Red (WA9260) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 9V5 | Woodland Green, solid (SEO paint) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.262. | Factory-verified |
| 9V9 | Doeskin Tan, solid (SEO paint) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.262. | Factory-verified |
| 9W3 | Wheatland Yellow, solid (SEO paint) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| 9W4 | Tangier Orange, solid (SEO paint) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.262. | Factory-verified |
| PPG | Paint, flat green (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| PPT | Paint, flat tan (LSSV) | 2005 | only in: 4WD (Light Service Support Vehicle, military) | Factory-verified |
| TGK | Special paint, solid (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2006 Chevrolet Silverado, p.260. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| TGL | Special paint, two-tone (SEO) | 2006 | named with TGK in the 2006 order guide GM Heritage factory kit — 2006 Chevrolet Silverado, p.260. | Factory-verified |
| ZY1 | Paint scheme, solid | 1999–2000, 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.208. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.200. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.219. | Factory-verified |
| ZY2 | Paint scheme, two-tone | 1999–2000, 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.184. GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.200. GM Heritage factory kit — 2006 Chevrolet Silverado, p.250. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| Interior Trim | ||||
| 522 | Tan, leather | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 52C | Tan, cloth | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 52D | Tan, custom cloth | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.262. | Factory-verified |
| 52V | Tan, vinyl | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.262. | Factory-verified |
| 692 | Dark Charcoal, leather | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 69C | Dark Charcoal, cloth | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 69D | Dark Charcoal, custom cloth | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| 69V | Dark Charcoal, vinyl | 2005–2006 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. | Factory-verified |
| 922 | Medium Gray, leather | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.183. GM Heritage factory kit — 2006 Chevrolet Silverado, p.259. GM Heritage factory kit — 2007 Chevrolet Silverado, p.261. | Factory-verified |
| Internal / Process | ||||
| 5M7 internal | Speedometer calibration provisions (SEO) | 2001 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.60. | Factory-verified |
| 8X1 internal | Label, fasten safety belts (SEO) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.196. GM Heritage factory kit — 2006 Chevrolet Silverado, p.262. GM Heritage factory kit — 2007 Chevrolet Silverado, p.264. | Factory-verified |
| ARL internal | Plant code: Arlington, Texas | 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.44. | Factory-verified |
| B4L internal | Label, price, refer to geographic chart | 2003–2005 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45. GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| BAG internal | Parts package, export (overseas shipping) | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.54. | Factory-verified |
| BL4 internal | Label, price, refer to geographic chart | 2006–2007 | only in: heavy-duty models (GM’s HD list: 1500HD, 2500HD, 3500) GM Heritage factory kit — 2006 Chevrolet Silverado, p.64. | Factory-verified |
| CKD internal | Vehicle completely knocked down (CKD) export assembly | 1999–2000, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.55. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| CMD internal | Plant code: Flint, Michigan (truck) | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.64. | Factory-verified |
| CT1 internal | Country code: Belgium | 1999–2000 | Factory-verified | |
| CT2 internal | Country code: Austria | 1999–2000 | Factory-verified | |
| CT3 internal | Country code: Germany | 1999–2000 | Factory-verified | |
| CT4 internal | Country code: Luxembourg | 1999–2000 | Factory-verified | |
| CT5 internal | Country code: Netherlands | 1999–2000 | Factory-verified | |
| CT6 internal | Country code: Italy | 1999–2000 | Factory-verified | |
| CT7 internal | Country code: Denmark | 1999–2000 | Factory-verified | |
| CT8 internal | Country code: Portugal | 1999–2000 | Factory-verified | |
| CT9 internal | Country code: Spain | 1999–2000 | Factory-verified | |
| CU1 internal | Country code: Norway | 1999–2000 | Factory-verified | |
| CU2 internal | Country code: Finland | 1999–2000 | Factory-verified | |
| CU3 internal | Country code: France | 1999–2000 | Factory-verified | |
| CU4 internal | Country code: Sweden | 1999–2000 | Factory-verified | |
| CU7 internal | Country code: Kuwait | 1999–2000 | Factory-verified | |
| CU8 internal | Country code: Saudi Arabia | 1999–2000 | Factory-verified | |
| CV1 internal | Country code: Iceland | 1999–2000 | Factory-verified | |
| CV2 internal | Country code: Brazil | 1999 | Factory-verified | |
| CV3 internal | Country code: Mexico | 1999 | Factory-verified | |
| CV6 internal | Country code: Chile | 1999–2000 | Factory-verified | |
| CW2 internal | Country code: Gulf States (Bahrain, Oman, Qatar, UAE) | 1999–2000 | Factory-verified | |
| CW4 internal | Country code: Caribbean | 1999–2000 | Factory-verified | |
| CW5 internal | Country code: Venezuela | 1999–2000 | Factory-verified | |
| CW6 internal | Country code: Guam | 1999–2000 | Factory-verified | |
| CW7 internal | Country code: Puerto Rico/U.S. Virgin Islands | 1999–2000 | Factory-verified | |
| CW8 internal | Country code: Mexico (Border Dealers) | 1999 | Factory-verified | |
| CX2 internal | Country code: Colombia | 1999 | Factory-verified | |
| CX3 internal | Country code: Ecuador | 1999 | Factory-verified | |
| CY1 internal | Country code: Africa | 1999 | Factory-verified | |
| CZ1 internal | Country code: Central America | 1999–2000 | Factory-verified | |
| CZ2 internal | Country code: China | 1999–2000 | Factory-verified | |
| CZ3 internal | Country code: Russia | 1999–2000 | Factory-verified | |
| DNR internal | Equipment, dealer installed | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.65. | Factory-verified |
| EVA internal | Test, DVT evaporative emission requirement | 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.45. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| EXP internal | Export processing | 1999–2000, 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| F0F internal | Fleet incentive: Tourism Industry Inc. (Budget Sales and Leasing) | 2004 | Factory-verified | |
| FE9 internal | Emissions, Federal | 1999–2000, 2003, 2005–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.205. GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2007 Chevrolet Silverado, p.59. | Factory-verified |
| FWI internal | Plant code: Fort Wayne, Indiana | 1999–2000, 2002, 2004 | Factory-verified | |
| GMC internal | Plant code: Pontiac East, Michigan | 1999–2000, 2002, 2004 | Factory-verified | |
| JAN internal | Plant code: Janesville, Wisconsin | 1999–2000 | Factory-verified | |
| MAE internal | Marketing area code: Europe | 1999–2000 | Factory-verified | |
| MAU internal | Marketing area code: unregulated | 1999–2000 | Factory-verified | |
| MEX internal | Plant code: Toluca, Mexico | 2004 | Factory-verified | |
| MSL internal | Plant code: Silao, Mexico | 1999 | Factory-verified | |
| NA1 internal | Emissions, GVW 8,500 lb or less | 1999–2000, 2002–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NA4 internal | Emissions, GVW over 8,500 lb | 1999–2000, 2002–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NA7 internal | Emissions, European | 1999–2000 | Factory-verified | |
| NB6 internal | Emissions, California Tier 1 | 1999–2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. | Factory-verified |
| NB8 internal | Emissions override, California | 2003, 2005–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. | Factory-verified |
| NC1 internal | Emissions, California LEV | 1999–2000, 2002–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NC7 internal | Emissions override, Federal | 2003, 2005–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NC8 internal | Emissions, California ULEV | 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NE1 internal | Emissions certification, geographically restricted registration (up to 14,000 lb GVW) | 2003, 2005–2007 | the 2003 and 2005 Silverado SS order guides read it as Maine/Massachusetts (and New York/Vermont) requirements GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NF2 internal | Emissions, Federal Tier 1 | 1999–2000, 2002–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NF4 internal | Emissions, clean fuel fleet | 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NF9 internal | Emissions, general (export) | 2003–2007 | 2003–2004 lists: general unleaded; 2005–2007: general with OBD malfunction-lamp suppression GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| NG1 internal | Emissions, geographically restricted (California requirements outside California) | 1999–2000, 2003 | the 2003 Silverado SS order guide reads it as New York or Vermont requirements GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.205. GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.207. | Factory-verified |
| NN8 internal | Emissions override, unleaded fuel, export | 1999–2000 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57. | Factory-verified |
| NT8 internal | Emissions, Federal Tier 2 | 2004–2007 | GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NT9 internal | Emissions, Federal Tier 2 phase-out | 2004–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.56. | Factory-verified |
| NU4 internal | Emissions, California Level 2 Plus | 2004–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.61. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| OSG internal | Plant code: Oshawa, Ontario (truck) | 1999–2000, 2002–2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.46. GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. | Factory-verified |
| P96 internal | Mexican modification, mandatory base equipment | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.60. | Factory-verified |
| R6Q internal | Safe and Sound package discount not desired | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado SS, p.130. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. GM Heritage factory kit — 2007 Chevrolet Silverado, p.301. | Factory-verified |
| T7L internal | Miscellaneous equipment for Central America (GMM controlled) | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. | Factory-verified |
| T8Z internal | Emissions, Mexico low emission vehicle | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.68. | Factory-verified |
| T98 internal | Vehicle identification number stamping | 2005–2007 | GM Heritage factory kit — 2006 Chevrolet Silverado, p.62. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| TZ3 internal | Emissions, Mexico level (GMM calibration) | 2005 | Factory-verified | |
| V60 internal | Vehicle statement, Gulf States, incomplete vehicle | 1999–2001, 2003–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| V73 internal | Vehicle statement, USA/Canada | 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| V78 internal | Vehicle statement, delete | 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| V87 internal | Vehicle statement, Gulf States | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| V98 internal | Factory delivery processing | 2002, 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VBX internal | Label, Arabic language | 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VC0 internal | Label, noise control information | 1999–2000, 2003–2007 | 2005–2007: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VC4 internal | Label, price and fuel economy, Puerto Rico and US Virgin Islands | 1999–2000, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VC5 internal | Label, shipping, except US, US possessions or Japan | 1999–2000, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VC7 internal | Label, price and fuel economy, Guam | 1999–2000, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VCB internal | Ship-through to Monroe Truck Equipment | 2005–2007 | 1500HD models in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. GM Heritage factory kit — 2007 Chevrolet Silverado, p.295. | Factory-verified |
| VCL internal | Emissions certification, clean fuel vehicle (fleet) | 2005–2007 | GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VD1 internal | Provisions, Europe | 1999–2000, 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| VE3 internal | Label, battery disposal | 1999 | Factory-verified | |
| VF4 internal | Label, export diesel engine smoke standard | 1999 | Factory-verified | |
| VFW internal | Ship-through to NBC Truck Equipment | 2005–2007 | 1500HD models in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.128. GM Heritage factory kit — 2006 Chevrolet Silverado, p.289. GM Heritage factory kit — 2007 Chevrolet Silverado, p.301. | Factory-verified |
| VG1 internal | Underhood corrosion protection for overseas shipment | 1999 | Factory-verified | |
| VG8 internal | Label, notice to buyer | 2003–2005 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VGC internal | Paint etch protective film (shipping) | 1999–2000, 2002–2007 | 2005: heavy-duty models only (GM’s HD list) GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VJ3 internal | Label/plate, ECE approval and vehicle identification | 1999–2000, 2002–2003, 2005–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VJ4 internal | Label, export child seat location | 2000, 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| VJ7 internal | Label, unleaded fuel only | 2002, 2005–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| VP3 internal | Noise control, European provisions | 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. | Factory-verified |
| VPH internal | Vehicle preparation, overseas delivery | 1999–2000, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| VR6 internal | Hooks, tie-down, shipping | 1999–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.58. | Factory-verified |
| VSQ internal | Ship-through to Monroe Truck Equipment | 2005, 2007 | 1500HD models in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.295. | Factory-verified |
| VUD internal | Ship-through to Knapheide Truck Equipment | 2005, 2007 | 1500HD models in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.295. | Factory-verified |
| VUI internal | Ship-through to Fort Wayne Fleet Equipment | 2005, 2007 | 1500HD models in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.295. | Factory-verified |
| VUM internal | Ship-through to Buckeye Truck Equipment | 2005, 2007 | 1500HD models in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500HD, p.129. GM Heritage factory kit — 2007 Chevrolet Silverado, p.295. | Factory-verified |
| VXS internal | Vehicle complete | 2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.47. GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VXT internal | Vehicle incomplete | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| VYS internal | Ship-through to Masterack Truck Equipment | 2005–2007 | 1500 models built at Pontiac in the 2005 order guide GM Heritage factory kit — 2005 Chevrolet Silverado 1500, p.200. GM Heritage factory kit — 2006 Chevrolet Silverado, p.271. GM Heritage factory kit — 2007 Chevrolet Silverado, p.267. | Factory-verified |
| VZ2 internal | Speedometer calibration A | 2000–2007 | GM Heritage factory kit — 2001 Chevrolet Silverado, p.58. GM Heritage factory kit — 2007 Chevrolet Silverado, p.61. | Factory-verified |
| VZ3 internal | Label, mercury disposal notification | 2004 | GM Heritage factory kit — 2004 Chevrolet Silverado, p.69. | Factory-verified |
| W86 internal | Miscellaneous equipment for Venezuela (GMV controlled) | 1999–2000, 2002–2007 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| W87 internal | Parts, North American, sourced in Venezuela (GMV controlled) | 1999–2000, 2002 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. | Factory-verified |
| W99 internal | Miscellaneous equipment for Venezuela (GM platform controlled) | 2002–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| X44 internal | Parts, North American sourced, shipped to outside supplier and checked (GMCL controlled) | 2003 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. | Factory-verified |
| X52 internal | Miscellaneous equipment for Guam, Puerto Rico and US Virgin Islands | 2003–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| X88 internal | Conversion nameplate / market brand: Chevrolet | 1999–2000, 2002–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.59. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| YF5 internal | Emissions, California | 1999–2000, 2003, 2005–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.205. GM Heritage factory kit — 2003 Chevrolet Silverado SS, p.208. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| Z49 internal | Canadian modification, mandatory base equipment | 1999–2000, 2002–2007 | GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.60. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
| Z75 internal | Conversion nameplate: Cadillac | 2002, 2004 | GM Heritage factory kit — 2002 Chevrolet Silverado, p.48. GM Heritage factory kit — 2004 Chevrolet Silverado, p.71. | Factory-verified |
| Z88 internal | Conversion nameplate / market brand: GMC | 1999–2007 | GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.49. GM Heritage factory kit — 2007 Chevrolet Silverado, p.62. | Factory-verified |
Source document: chevrolet/silverado-gmt800.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.