GMC · 1992-1999
Yukon — GMT400 (1992–1999)
yukon
474 option rows 474 RPO codes 2 model years
100% Factory-verified
- ✓ Factory-verified · 473
- ● Confirmed · 0
- ◑ Single-source · 0
- ⚠ Disputed · 1
Applicable options
Documented RPO codes
Model year
| Code | Option | Years | Notes & factory source | Confidence |
|---|---|---|---|---|
| Engines | ||||
| L31 | Engine, 5.7L V8, CPI | 1998–1999 | Wikipedia gives a 5.7L L05/L31 V8 for this generation | Factory-verified |
| L56 | Engine, diesel, 6.5L V8, turbo | 1998–1999 | Wikipedia gives a 6.5L Detroit Diesel L56 turbo V8 for this generation | Factory-verified |
| L65 | Engine, diesel, 6.5L V8, turbo | 1998–1999 | same wording as L56; Wikipedia gives the 6.5L turbo diesel V8 without this code | Factory-verified |
| Transmissions | ||||
| M30 | Transmission, 4L60-E, 4 speed automatic, electronic | 1998–1999 | Wikipedia gives a 4 speed 4L60E automatic for this generation | Factory-verified |
| M50 | Transmission, manual, 5 speed, New Venture Gear | 1998 | same wording as MG5 and MW3; Wikipedia gives NV3500 and NV4500 5 speed manuals without codes | Factory-verified |
| MG5 | Transmission, manual, 5 speed, New Venture Gear | 1998 | same wording as M50 and MW3; Wikipedia gives NV3500 and NV4500 5 speed manuals without codes | Factory-verified |
| MT1 | Transmission, 4L80-E, 4 speed automatic, electronic | 1998–1999 | Wikipedia gives a 4 speed 4L80E automatic for this generation | Factory-verified |
| MW3 | Transmission, manual, 5 speed, New Venture Gear | 1998–1999 | same wording as M50 and MG5; Wikipedia gives NV3500 and NV4500 5 speed manuals without codes | Factory-verified |
| NP1 | Transfer case, electronic shift, two speed | 1998–1999 | Factory-verified | |
| NP8 | Transfer case, two speed, pushbutton control | 1999 | Factory-verified | |
| Axles | ||||
| G80 | Axle, rear, Positraction | 1998–1999 | Factory-verified | |
| GK9 | Axle, rear, 4.63 ratio | 1998–1999 | Factory-verified | |
| GT4 | Axle, rear, 3.73 ratio | 1998–1999 | Factory-verified | |
| GT5 | Axle, rear, 4.10 ratio | 1998–1999 | Factory-verified | |
| GTY | Axle, wide track | 1998–1999 | Factory-verified | |
| GU4 | Axle, rear, 3.08 ratio | 1998–1999 | Factory-verified | |
| GU6 | Axle, rear, 3.42 ratio | 1998–1999 | Factory-verified | |
| HC4 | Axle, rear, 4.56 ratio | 1998–1999 | Factory-verified | |
| HC7 | Axle, rear, 5.13 ratio | 1998–1999 | Factory-verified | |
| YA9 | Axle, 3400 lbs | 1998 | Factory-verified | |
| Packages & Trims | ||||
| BYP | Sales package, sport equipment | 1998–1999 | Factory-verified | |
| NZZ | Sales package, skid plate, off road sport | 1998–1999 | Factory-verified | |
| PAC | Police conversion sales package, base | 1999 | Factory-verified | |
| POD | Police conversion sales package, uplevel | 1999 | Factory-verified | |
| VAJ | Package, roadside service program | 1999 | Factory-verified | |
| Y91 | Sales package, luxury (GMT 425) | 1998–1999 | GM prints "GMT 425" | Factory-verified |
| YE9 | Convenience package, comfort and decor level 3 | 1998–1999 | Factory-verified | |
| YF2 | Sales package, ambulance upfitter | 1998–1999 | Factory-verified | |
| YF7 | Sales package, recreational vehicle upfitter | 1998–1999 | Factory-verified | |
| Z56 | Police conversion chassis package | 1999 | Factory-verified | |
| Z71 | Chassis package, off-road | 1998–1999 | Factory-verified | |
| ZP6 | Sales package, combination rear window wiper and rear window defogger | 1998–1999 | Factory-verified | |
| Equipment | ||||
| 1M1 | Marking, U.S. Army, reflective white | 1999 | Factory-verified | |
| 1M3 | Marking, U.S. Navy, reflective white | 1999 | Factory-verified | |
| 27A | Stripe, accent color, Light Indigo/Dark Indigo | 1998 | Factory-verified | |
| 31A | Stripe, accent color, Light Silver/Dark Indigo | 1998 | GM prints "SIlver" | Factory-verified |
| 3EC | Tire, rear, LT215/85R16E BL R/ST TL HWY | 1999 | Factory-verified | |
| 3ED | Tire, rear, LT215/85R16E BL R/ST ST TL ALS | 1999 | Factory-verified | |
| 4BL | Tire, spare, LT265/75PR16D RWL R/PE ST TL AT | 1999 | Factory-verified | |
| 4EC | Tire, spare, LT215/85R16E BL R/ST ST TL HWY | 1999 | Factory-verified | |
| 4ED | Tire, spare, LT215/85R16E BL R/ST ST TL ALS | 1999 | Factory-verified | |
| 51A | Stripe, accent color, Gunmetal/Ultra Silver | 1998 | Factory-verified | |
| 56A | Stripe, accent color, Medium Beige/Black | 1998–1999 | Factory-verified | |
| 6DC | Compartment, front left-hand, computer selected suspension | 1999 | Factory-verified | |
| 6GC | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6GF | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6GG | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6GH | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6GK | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6GL | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6GR | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WF | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WK | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WL | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WN | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WP | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WS | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WW | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6WZ | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6XA | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6XC | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6XD | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6XJ | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 6Y4 | Spare wheel and tire, delete | 1999 | GM prints "Delee" | Factory-verified |
| 6YB | Suspension, front left-hand, computer selected | 1999 | GM prints "Supension" | Factory-verified |
| 7DC | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7GC | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7GF | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7GG | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7GH | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7GK | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7GL | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WF | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WK | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WL | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WN | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WP | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WS | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WT | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WX | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7WZ | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7XA | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7XC | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7XD | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7XJ | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 7YB | Suspension, front right-hand, computer selected | 1999 | Factory-verified | |
| 80A | Stripe, accent color, Gunmetal/Light Silver | 1998 | Factory-verified | |
| 81A | Stripe, accent color, two tone, Gunmetal/Light Pewter | 1999 | Factory-verified | |
| 82A | Stripe, accent color, two tone, Light Silver/Dark Green | 1998–1999 | Factory-verified | |
| 83A | Stripe, accent color, Green/Ultra Silver | 1998 | Factory-verified | |
| 84A | Stripe, accent color, Light Silver/Dark Indigo | 1998 | Factory-verified | |
| 87A | Stripe, accent color, Light Silver/Medium Red | 1998 | Factory-verified | |
| 94A | Stripe, accent color, two tone, Medium Gold/Dark Gold | 1999 | Factory-verified | |
| 95A | Stripe, accent color, two tone, Light Pewter/Gunmetal | 1999 | Factory-verified | |
| A20 | Window, rear quarter, swing out | 1998–1999 | Factory-verified | |
| A21 | Window, non encapsulated glass | 1998–1999 | Factory-verified | |
| A28 | Window, rear, full width, sliding | 1998–1999 | Factory-verified | |
| A31 | Window, power | 1998–1999 | Factory-verified | |
| A50 | Seat, front bucket | 1998–1999 | Factory-verified | |
| A52 | Seat, front bench | 1998–1999 | Factory-verified | |
| A95 | Seat, front bucket, high back, driver and passenger reclining | 1998–1999 | Factory-verified | |
| AE7 | Seat, front bench, 60/40 split, easy entry, driver and passenger | 1998–1999 | Factory-verified | |
| AG2 | Adjuster, front passenger seat, power 6 way | 1998–1999 | GM adds "Req. IP2" in 1999 | Factory-verified |
| AJ1 | Window, tinted deep, all except windshield and front doors, solar privacy glass | 1998–1999 | the 1998 list reads "Windows: Deep Tint" | Factory-verified |
| AJ3 | Restraint, front seat, driver inflatable | 1998 | Factory-verified | |
| AL3 | Restraint, front seat, driver inflatable, delete | 1998 | Factory-verified | |
| AM7 | Seat, rear, folding | 1998–1999 | Factory-verified | |
| APC | Provisions, front bucket seating | 1998–1999 | Factory-verified | |
| APD | Provisions, front bench seating | 1998–1999 | Factory-verified | |
| AT5 | Seat, rear, folding, center | 1998–1999 | the 1998 list reads "Seat, Center" | Factory-verified |
| ATZ | Seat, rear, delete | 1998–1999 | Factory-verified | |
| AU0 | Lock control, remote entry | 1998–1999 | Factory-verified | |
| AU3 | Locks, power door | 1998–1999 | Factory-verified | |
| AU6 | Lock, end gate, electric, remote release | 1998–1999 | the 1998 list reads "Electric End Gate Lock Release" | Factory-verified |
| B30 | Floor covering, carpet | 1998–1999 | Factory-verified | |
| B32 | Auxiliary floor covering, front floor mats | 1998–1999 | Factory-verified | |
| B33 | Auxiliary floor covering, rear floor mats | 1998–1999 | Factory-verified | |
| B34 | Floor mats, front, carpeted | 1998–1999 | Factory-verified | |
| B35 | Floor mats, rear, carpeted | 1998–1999 | Factory-verified | |
| B37 | Floor covering, auxiliary, front and rear | 1998–1999 | Factory-verified | |
| B39 | Floor covering, carpeted floor mat | 1998–1999 | Factory-verified | |
| B58 | Floor covering mats, front and rear, carpeted insert | 1999 | Factory-verified | |
| B71 | Molding, wheel opening, colored | 1998–1999 | Factory-verified | |
| B85 | Molding, body side, exterior | 1998–1999 | Factory-verified | |
| B96 | Molding, wheel opening | 1998–1999 | Factory-verified | |
| BG9 | Floor covering, rubber | 1998–1999 | Factory-verified | |
| BNP | Molding, wheel opening, delete | 1998–1999 | Factory-verified | |
| BVE | Steps, running board | 1998–1999 | Factory-verified | |
| BZY | Liner, pickup box | 1998–1999 | may be pickup equipment: the lists are word for word the Chevrolet and GMC pickup lists | Factory-verified |
| C25 | Wiper system, rear window | 1998–1999 | Factory-verified | |
| C36 | Heater, auxiliary | 1998–1999 | Factory-verified | |
| C3F | GVW rating, 7700 lbs | 1998–1999 | Factory-verified | |
| C49 | Defogger, rear window, electric | 1998–1999 | Factory-verified | |
| C51 | GVW rating, 8050 lbs | 1998–1999 | the 1998 list prints C5I; C51 in the 1999 list | Factory-verified |
| C5B | GVW rating, 15000 lbs | 1998–1999 | Factory-verified | |
| C5M | GVW rating, 6100 lbs | 1998–1999 | Factory-verified | |
| C5P | GVW rating, 6250 lbs | 1998–1999 | Factory-verified | |
| C5Q | GVW rating, 6300 lbs | 1998–1999 | Factory-verified | |
| C5S | GVW rating, 6600 lbs | 1998–1999 | Factory-verified | |
| C5U | GVW rating, 6800 lbs | 1998–1999 | GM prints "6800KBS" | Factory-verified |
| C5Z | GVW rating, 7200 lbs | 1998 | Factory-verified | |
| C60 | HVAC system, front air conditioning | 1998–1999 | GM prints "Conditiong" | Factory-verified |
| C69 | HVAC system, rear air conditioning | 1998–1999 | GM prints "Conditing" | Factory-verified |
| C6A | GVW rating, 7300 lbs | 1999 | Factory-verified | |
| C6E | GVW rating, 9400 lbs | 1999 | Factory-verified | |
| C6P | GVW rating, 8600 lbs | 1998–1999 | Factory-verified | |
| C6U | GVW rating, 9000 lbs | 1998–1999 | Factory-verified | |
| C6W | GVW rating, 9200 lbs | 1998–1999 | Factory-verified | |
| C6Y | GVW rating, 9600 lbs | 1998–1999 | Factory-verified | |
| C7A | GVW rating, 10000 lbs | 1998–1999 | Factory-verified | |
| C7E | GVW rating, 11000 lbs | 1998–1999 | Factory-verified | |
| C7I | GVW rating, 6450 lbs | 1998–1999 | Factory-verified | |
| C7L | GVW rating, 12000 lbs | 1998–1999 | Factory-verified | |
| D07 | Console, front compartment, floor | 1999 | Factory-verified | |
| D44 | Mirror, outside, painted | 1998–1999 | Factory-verified | |
| D45 | Mirror, outside, stainless steel | 1998–1999 | Factory-verified | |
| D48 | Mirror, outside, remote control, electric | 1998–1999 | Factory-verified | |
| D55 | Console, front compartment, floor | 1998–1999 | same wording as D07 | Factory-verified |
| DD0 | Mirror, outside, left-hand and right-hand, electric, heated, electrochromic | 1998–1999 | the 1999 list prints DDO; the 1998 list and GM's other lists print DD0 | Factory-verified |
| DD7 | Mirror, inside rearview, light sensitive, compass | 1998–1999 | Factory-verified | |
| DE2 | Mirror, outside, left-hand and right-hand, folding, painted | 1998–1999 | Factory-verified | |
| DF2 | Mirror, outside, left-hand and right-hand, camper style, stainless steel | 1998–1999 | Factory-verified | |
| DF5 | Mirror, inside rearview, electrochromic, compass and outside temperature | 1998–1999 | Factory-verified | |
| DG5 | Mirror, outside, left-hand and right-hand, large, stainless steel | 1998–1999 | Factory-verified | |
| DK6 | Console, roof, interior | 1998–1999 | Factory-verified | |
| DR1 | Mirror, outside, left-hand and right-hand, manual control | 1998 | Factory-verified | |
| E24 | Door, rear side hinged | 1998–1999 | Factory-verified | |
| E55 | Body equipment, end gate | 1998–1999 | Factory-verified | |
| E62 | Body equipment, stepside pickup box | 1998 | may be pickup equipment: the lists are word for word the Chevrolet and GMC pickup lists | Factory-verified |
| E63 | Body equipment, fleetside pickup box | 1998–1999 | may be pickup equipment: the lists are word for word the Chevrolet and GMC pickup lists | Factory-verified |
| EF1 | Bumper provisions, rear, delete | 1998–1999 | Factory-verified | |
| F44 | Chassis, heavy duty | 1998–1999 | Factory-verified | |
| F48 | Chassis, manual select damping | 1998 | GM prints "Dampening" | Factory-verified |
| F51 | Shock absorbers, front and rear, heavy duty | 1998–1999 | Factory-verified | |
| F60 | Spring, front, heavy duty | 1998–1999 | Factory-verified | |
| F61 | Stabilizer shaft, rear | 1998–1999 | Factory-verified | |
| FF4 | Torsion bar spring adjuster (C) | 1999 | Factory-verified | |
| FF5 | Torsion bar spring adjuster (D) | 1999 | Factory-verified | |
| FF6 | Torsion bar spring adjuster (E) | 1999 | Factory-verified | |
| FF7 | Torsion bar spring adjuster (F) | 1999 | Factory-verified | |
| FF8 | Torsion bar spring adjuster (G) | 1999 | Factory-verified | |
| FF9 | Torsion bar spring adjuster (H) | 1999 | Factory-verified | |
| FG5 | Shock absorbers, front and rear, gas, Delco/Bilstein, 46 mm | 1998–1999 | GM prints "Billstein" | Factory-verified |
| FK2 | Torsion bar spring adjuster (A) | 1999 | Factory-verified | |
| FK3 | Torsion bar spring adjuster (B) | 1999 | Factory-verified | |
| JB5 | Brake system, power, front disc, rear drum, 6400 lbs | 1998–1999 | Factory-verified | |
| JB6 | Brake system, power, front disc, rear drum, 7200 lbs | 1998–1999 | Factory-verified | |
| JB7 | Brake system, power, front disc, rear drum, 8400 lbs | 1998–1999 | Factory-verified | |
| JB8 | Brake system, power, front disc, rear drum, 10000 lbs | 1998–1999 | Factory-verified | |
| JD5 | Brake system, dual power, front disc, rear drum, 6400 lbs | 1998–1999 | Factory-verified | |
| JD6 | Brake system, hydraulic power, front disc, rear drum, 7200 lbs | 1998–1999 | Factory-verified | |
| JD7 | Brake system, hydraulic power, front disc, rear drum, 8400 lbs | 1998–1999 | Factory-verified | |
| JF9 | Brake system, hydraulic power, four wheel disc | 1998–1999 | Factory-verified | |
| K02 | Fan, radiator booster | 1998–1999 | Factory-verified | |
| K05 | Heater, engine block | 1998–1999 | Factory-verified | |
| K19 | Air injection system, electric | 1999 | Factory-verified | |
| K34 | Cruise control, automatic, electronic | 1998–1999 | Factory-verified | |
| K47 | Air cleaner, high capacity | 1998–1999 | Factory-verified | |
| K53 | Fuel system, robust, fuel sensor | 1999 | Factory-verified | |
| K60 | Generator, 100 ampere | 1998–1999 | Factory-verified | |
| K68 | Generator, 105 ampere | 1998–1999 | Factory-verified | |
| KA1 | Seats, heated, driver and passenger, high back bucket with leather | 1998–1999 | Factory-verified | |
| KC4 | Cooling system, engine oil | 1998–1999 | Factory-verified | |
| KG9 | Generator, 140 ampere | 1998–1999 | Factory-verified | |
| KNP | Transmission, heavy duty cooling system | 1998–1999 | Factory-verified | |
| KW2 | Generator, 124 ampere | 1998–1999 | Factory-verified | |
| KXB | Generator, dual, 100 ampere | 1998–1999 | Factory-verified | |
| N33 | Steering column, tilt type | 1998–1999 | Factory-verified | |
| N83 | Wheel, 15 x 7, chrome styled | 1998–1999 | Factory-verified | |
| N90 | Wheel, 15 x 7, aluminum cast, 4.75 inch bolt circle | 1998–1999 | Factory-verified | |
| NM8 | Fuel system, leaded fuel compatible | 1998–1999 | export fuel and emission calibration | Factory-verified |
| NP5 | Steering wheel, leather wrapped | 1998–1999 | Factory-verified | |
| NPL | Plate, name | 1999 | 1999 only | Factory-verified |
| NQZ | Fuel tank, auxiliary, rear mounted, 18 gallon, delete | 1998–1999 | Factory-verified | |
| NRQ | Exhaust, close coupled | 1998–1999 | Factory-verified | |
| NY1 | Shield, fuel tank | 1998–1999 | Factory-verified | |
| P06 | Wheel, trim discs | 1998–1999 | the 1998 and 1999 lists print PO6; P06 in GM's other lists | Factory-verified |
| PC5 | Wheel, 15 x 7, steel styled | 1999 | Factory-verified | |
| PF4 | Wheel, 16 x 7, aluminum cast | 1998–1999 | Factory-verified | |
| PX2 | Wheel, aluminum, chrome style | 1999 | Factory-verified | |
| Q2G | Tire, all, P235/70R15 BW R/PE ST TL AL3 102V | 1999 | GM prints P23570R15 | Factory-verified |
| Q4B | GVW rating, 6200 lbs | 1998–1999 | Factory-verified | |
| QBN | Tire, all, LT245/75R16/C BW R/PE ST TBL OOR | 1998–1999 | Factory-verified | |
| QBX | Tire, all, LT245/75R16/C WOL R/PE ST TBL OOR | 1998–1999 | Factory-verified | |
| QFL | Tire, all, P235/75R15 BW R/PE ST TL ALS 105S | 1998–1999 | Factory-verified | |
| QFN | Tire, all, P235/75R15 WL R/PE ST TL ALS 105S | 1998–1999 | Factory-verified | |
| QGA | Tire, all, P245/75R16 BW R/PE ST TL ALS 109S | 1998–1999 | Factory-verified | |
| QGB | Tire, all, P245/75/R16 WOL R/PE ST TL ALS 109S | 1998–1999 | Factory-verified | |
| QGC | Tire, all, P265/75/R16 BW R/PE ST TL ALS 114S | 1998–1999 | Factory-verified | |
| QGD | Tire, all, P265/75/R16 WOL R/PE ST TL ALS 114S | 1998–1999 | Factory-verified | |
| QHA | Tire, all, P235/75/R15/X BW R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| QHM | Tire, all, P235/75R15 WOL R/PE ST TL ALS 108S (X Load) | 1999 | Factory-verified | |
| QIW | Tire, all, P245/75/R16 BL R/PE ST TL OOR | 1998–1999 | Factory-verified | |
| QIZ | Tire, all, P245/75/R16 BL R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| QMJ | Tire, all, P265/70R16 BW R/PE ST TL AL2 111S | 1999 | Factory-verified | |
| R04 | Wheel, single rear | 1998–1999 | Factory-verified | |
| R05 | Wheel, dual rear | 1998–1999 | Factory-verified | |
| R4J | Tire brand, all, Goodrich | 1999 | Factory-verified | |
| R4Y | Tire brand, all, Goodyear | 1999 | Factory-verified | |
| RHD | Right-hand drive | 1998–1999 | Factory-verified | |
| RSA | Restraint, front seat, 208, automatic, passive | 1998 | Factory-verified | |
| RSB | Restraint, front seat, 208, automatic, manual, active | 1998 | Factory-verified | |
| T17 | Tire brand, all, Firestone | 1999 | Factory-verified | |
| T2H | Ornamentation, exterior, export unique requirements | 1999 | Factory-verified | |
| T62 | Lighting, daytime running, delete | 1998–1999 | Factory-verified | |
| T85 | Headlamps, left-hand rule of road, E mark | 1998–1999 | Factory-verified | |
| TL1 | Grille, special | 1998–1999 | Factory-verified | |
| TP2 | Battery, auxiliary, camper | 1998–1999 | Factory-verified | |
| TP3 | Battery, dual, 600 CCA | 1999 | Factory-verified | |
| U01 | Lamp, roof marker, five | 1998–1999 | Factory-verified | |
| U19 | Speedometer, instrument, kilometers and miles | 1998–1999 | Factory-verified | |
| U1Z | Compact disc player, multiple, passenger compartment | 1999 | Factory-verified | |
| UC2 | Speedometer, instrument, kilometers and miles, kilometer odometer, positive bias | 1998–1999 | Factory-verified | |
| UD4 | Alarm, vehicle speed, 120 km/h | 1998–1999 | Factory-verified | |
| UG1 | HomeLink 3-channel transmitter | 1998–1999 | Factory-verified | |
| UK1 | Radio, frequencies, Japanese | 1998–1999 | Factory-verified | |
| UL0 | Radio, AM/FM stereo, seek/scan, auto reverse cassette, music search | 1998–1999 | the 1999 list prints ULO; the 1998 list and GM's other lists print UL0 | Factory-verified |
| UL2 | Radio, frequencies, European | 1998–1999 | Factory-verified | |
| UL5 | Radio, delete | 1998–1999 | Factory-verified | |
| UM6 | Radio, AM/FM stereo, seek/scan, auto reverse cassette, clock, ETR | 1998–1999 | Factory-verified | |
| UM7 | Radio, AM/FM stereo, seek/scan, clock, ETR | 1998–1999 | GM prints "Stero" | Factory-verified |
| UN0 | Radio, AM/FM stereo, seek/scan, compact disc, auto tone | 1998–1999 | Factory-verified | |
| UP0 | Radio, AM/FM stereo, seek/scan, auto reverse, music search, cassette, compact disc player, auto tone | 1998–1999 | Factory-verified | |
| UQ3 | Speaker system, performance enhanced radio | 1998–1999 | Factory-verified | |
| UQ5 | Speaker system, 4, dual front door mounted, dual extended range quarter mounted | 1998–1999 | Factory-verified | |
| UV8 | Mobile telephone provisions | 1999 | Factory-verified | |
| UW3 | Radio, AM/FM stereo, seek/scan, auto reverse, music search | 1998–1999 | Factory-verified | |
| UY1 | Wiring provisions, camper | 1998–1999 | Factory-verified | |
| V10 | Provisions, cold climate | 1998–1999 | Factory-verified | |
| V22 | Grille, chrome radiator | 1998–1999 | Factory-verified | |
| V27 | Guards, front bumper | 1998–1999 | Factory-verified | |
| V43 | Bumper, rear step, painted | 1998–1999 | Factory-verified | |
| V54 | Luggage carrier, roof, painted | 1998–1999 | Factory-verified | |
| V76 | Tow hook | 1998–1999 | Factory-verified | |
| VB3 | Bumper, rear step, chrome, impact strip | 1998–1999 | Factory-verified | |
| VG3 | Bumper, front, impact strip | 1998–1999 | Factory-verified | |
| VK3 | License plate, front mounting package | 1998–1999 | Factory-verified | |
| VP6 | Noise control | 1999 | Factory-verified | |
| VR4 | Trailer hitch, weight distributing platform | 1998–1999 | Factory-verified | |
| VWX | Grille, base vehicle | 1999 | Factory-verified | |
| VYU | Provisions, snow plow preparation | 1998–1999 | GM prints "Provisiions" | Factory-verified |
| XBN | Tire, front, LT245/75/R16/C BL R/PE ST TBL OOR | 1998–1999 | Factory-verified | |
| XBX | Tire, front, LT245/75/R16/C WOL R/PE ST TBL OOR | 1998–1999 | Factory-verified | |
| XFL | Tire, front, P235/75/R15 ST TL ALS B/W | 1998–1999 | Factory-verified | |
| XFN | Tire, front, P235/75/R15/N WL R/PE ST TL ALS 105S | 1998–1999 | Factory-verified | |
| XGA | Tire, front, P245/75/R16 BW R/PE ST TL AT 109S | 1998–1999 | Factory-verified | |
| XGB | Tire, front, P245/75/R16 WOL R/PE ST TL AT 109S | 1998–1999 | Factory-verified | |
| XGC | Tire, front, P265/75/R16 BW R/PE ST TL AT 114S | 1998–1999 | Factory-verified | |
| XGD | Tire, front, P265/75/R16 WOL R/PE ST TL AT 114S | 1998–1999 | Factory-verified | |
| XGK | Tire, front, LT245/75/R16 BL R/PE ST OOR | 1998–1999 | Factory-verified | |
| XHA | Tire, front, P235/75/R15X BL R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| XHE | Tire, front, LT235/75R16C BL R/PE ST ALS | 1998 | GM prints LT235/75/R16C | Factory-verified |
| XHH | Tire, front, LT245/75/R16E BL R/PE ST ALS | 1998–1999 | Factory-verified | |
| XHM | Tire, front, P235/75/R15 WOL R/PE ST TL ALS 108S (X/LOAD) | 1998–1999 | Factory-verified | |
| XHP | Tire, front, LT225/75/R16D BL R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| XHR | Tire, front, LT225/75/R16D BL R/PE ST TL OOR | 1998–1999 | Factory-verified | |
| XMJ | Tire, front, P265/70R16 BW R/PE ST TL AL2 111S | 1999 | Factory-verified | |
| XQG | Tire, front, P235/70R15 BW R/PE ST TL AL3 102V | 1999 | Factory-verified | |
| XTN | Tire, front, LT225/70R19.5F BW R/ST ST TL HWY | 1998–1999 | GM prints 225/70R9.5F; YTN and ZTN read LT225/70R19.5; the 1999 list prints TWY, the 1998 list HWY like YTN and ZTN | Factory-verified |
| XYK | Tire, front, LT215/85R16D BL R/PE ST TL OOR | 1998–1999 | the 1998 list also prints a HWY line; the 1999 list prints OOR only | Factory-verified |
| XYL | Tire, front, LT215/85R16D BL R/PE ST TL HWY | 1999 | Factory-verified | |
| YBN | Tire, rear, LT245/75R16C BL R/PE ST TBL OOR | 1998–1999 | Factory-verified | |
| YBX | Tire, rear, LT245/75R16C WOL R/PE ST TBL OOR | 1998–1999 | Factory-verified | |
| YD6 | Spring, rear, base equipment | 1998 | Factory-verified | |
| YFL | Tire, rear, P235/75R15 BW R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| YFN | Tire, rear, P235/75R15N RWL R/PE ST TL ALS 105S | 1998–1999 | Factory-verified | |
| YG4 | Seats, optional, not desired | 1998 | Factory-verified | |
| YG6 | HVAC system, air conditioning | 1999 | the 1999 list also prints YG6 as a Holden conversion name plate, which is left out | Factory-verified |
| YGA | Tire, rear, P245/75R16 BW R/PE ST TL AT 109S | 1998–1999 | Factory-verified | |
| YGB | Tire, rear, P245/75R16 WOL R/PE ST TL AT 109S | 1998–1999 | Factory-verified | |
| YGC | Tire, rear, P265/75R16 BW R/PE ST TL AT 114S | 1998–1999 | GM prints lower case p | Factory-verified |
| YGD | Tire, rear, P265/75R16 WOL R/PE ST TL AT 114S | 1998–1999 | Factory-verified | |
| YGK | Tire, rear, LT245/75R16E BL R/PE ST OOR (9591214) | 1998–1999 | GM prints P245/75R16E; ZGK reads LT245/75R16E | Factory-verified |
| YHA | Tire, rear, P235/75R15X BL R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| YHH | Tire, rear, LT245/75R16E BL R/PE ST ALS | 1998–1999 | GM prints P245/75R16E; XHH and ZHH read LT245/75R16E | Factory-verified |
| YHM | Tire, rear, P235/75R15 WOL R/PE ST TL ALS 108S (X/LOAD) | 1998–1999 | Factory-verified | |
| YHP | Tire, rear, LT225/75R16D BL R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| YHR | Tire, rear, LT225/75R16D BL R/PE ST TL OOR | 1998 | Factory-verified | |
| YMJ | Tire, rear, P265/70R16 BW R/PE ST TL AL2 111S | 1999 | the 1999 list prints LT215/85R16D BL R/PE ST TL HWY (a line shift; XMJ and ZMJ read P265/70R16 AL2 111S) | Factory-verified |
| YQG | Tire, rear, P235/70R15 BW R/PE ST TL AL3 102V | 1999 | GM prints lower case p | Factory-verified |
| YTN | Tire, rear, LT225/70R19.5 BW R/ST ST TL HWY | 1998–1999 | Factory-verified | |
| YYK | Tire, rear, LT215/85R16D BL R/PE ST TL HWY | 1998 | Factory-verified | |
| YYL | Tire, rear, LT215/85R16D BL R/PE ST TL OOR | 1998–1999 | Factory-verified | |
| Z5X | Mirror provisions, Arabic language | 1999 | GM prints "Lanuage" | Factory-verified |
| Z81 | Camper special | 1998–1999 | Factory-verified | |
| Z82 | Trailer provisions, special equipment, heavy duty | 1998–1999 | Factory-verified | |
| ZBN | Tire, spare, LT245/75R16C BL R/PE ST TBLE OOR | 1998–1999 | Factory-verified | |
| ZBX | Tire, spare, LT245/75R16C WOL R/PE ST TBLE OOR | 1998–1999 | Factory-verified | |
| ZFL | Tire, spare, P235/75R15 BW R/PE ST TL ALS 105S | 1998–1999 | Factory-verified | |
| ZFN | Tire, spare, P235/75R15N RWL R/PE ST TL ALS 105S | 1998–1999 | Factory-verified | |
| ZGA | Tire, spare, P245/75R16 BW R/PE ST TL ALS 109S | 1998–1999 | Factory-verified | |
| ZGB | Tire, spare, P245/75R16 WOL R/PE ST TL AT 109S | 1998–1999 | Factory-verified | |
| ZGC | Tire, spare, P265/75R16 BW R/PE ST TL AT 114S | 1998–1999 | Factory-verified | |
| ZGD | Tire, spare, P265/75R16 WOL R/PE ST TL AT 114S | 1998–1999 | Factory-verified | |
| ZGK | Tire, spare, LT245/75R16E BL R/PE ST OOR | 1998–1999 | Factory-verified | |
| ZHA | Tire, spare, P235/75R15X BW R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| ZHH | Tire, spare, LT245/75R16E BL R/PE ST ALS | 1998–1999 | Factory-verified | |
| ZHM | Tire, spare, P235/75R15 WOL R/PE ST TL ALS 108S (X/LOAD) | 1998–1999 | the 1999 list prints R14; the 1998 list, XHM and YHM read R15 | Factory-verified |
| ZHP | Tire, spare, LT225/75R16D BL R/PE ST TL ALS | 1998–1999 | Factory-verified | |
| ZHR | Tire, spare, LT225/75R16D BL R/PE ST TL OOR | 1998–1999 | Factory-verified | |
| ZMJ | Tire, spare, P265/70R16 BW R/PE ST TL AL2 111S | 1999 | Factory-verified | |
| ZQG | Tire, spare, P235/70R15 BW R/PE ST TL AL3 102V | 1999 | GM prints 102A; XQG and YQG read 102V | Factory-verified |
| ZTN | Tire, spare, LT225/70R19.5F BW R/ST ST TL HWY | 1998–1999 | Factory-verified | |
| ZW9 | Body equipment, base body or chassis cab | 1998–1999 | Factory-verified | |
| ZYK | Tire, spare, LT215/85R16D BL R/PE ST TL HWY | 1998–1999 | Factory-verified | |
| ZYL | Tire, spare, LT215/85R16D BL R/PE ST TL OOR | 1998–1999 | GM prints LT21585R16D | Factory-verified |
| Paint | ||||
| 01L | Paint, secondary exterior, special | 1998–1999 | Factory-verified | |
| 01U | Paint, primary exterior, special | 1998–1999 | Factory-verified | |
| 11L | Paint, secondary exterior, Pewter Metallic | 1998–1999 | Factory-verified | |
| 11U | Paint, primary exterior, Pewter Metallic | 1998–1999 | Factory-verified | |
| 12U | Paint, primary exterior, Linen White | 1998–1999 | Factory-verified | |
| 14L | Paint, secondary exterior, Storm Gray Metallic | 1999 | Factory-verified | |
| 14U | Paint, primary exterior, Storm Gray Metallic | 1999 | Factory-verified | |
| 17U | Paint, primary exterior, Silvermist Metallic | 1999 | Factory-verified | |
| 18U | Paint, primary exterior, Dark Green Gray Metallic | 1999 | Factory-verified | |
| 19U | Paint, primary exterior, Lamp Black | 1998–1999 | GM prints "Balck" | Factory-verified |
| 23U | Paint, primary exterior, Ocean Blue | 1998–1999 | Factory-verified | |
| 24L | Paint, secondary exterior, Opal Blue | 1998–1999 | GM prints "Bule" | Factory-verified |
| 24U | Paint, primary exterior, Opal Blue | 1998–1999 | disputed: the 1998 and 1999 lists each print 24U twice, once as Opal Blue and once as Medium Blue Metallic (34U is Medium Blue Metallic) | Disputed |
| 25L | Paint, secondary exterior, Bright Blue Metallic | 1998–1999 | Factory-verified | |
| 29U | Paint, primary exterior, Dark Blue | 1998–1999 | Factory-verified | |
| 34U | Paint, primary exterior, Medium Blue Metallic | 1999 | Factory-verified | |
| 35L | Paint, secondary exterior, Laguna Green | 1998–1999 | Factory-verified | |
| 35U | Paint, primary exterior, Laguna Green | 1998 | Factory-verified | |
| 39L | Paint, secondary exterior, Indigo Blue Metallic | 1998–1999 | Factory-verified | |
| 39U | Paint, primary exterior, Indigo Blue Metallic | 1998–1999 | Factory-verified | |
| 41L | Paint, secondary exterior, Black | 1998–1999 | Factory-verified | |
| 41U | Paint, primary exterior, Black | 1998–1999 | Factory-verified | |
| 43L | Paint, secondary exterior, Emerald Green | 1998 | Factory-verified | |
| 43U | Paint, primary exterior, Emerald Green | 1998–1999 | Factory-verified | |
| 46U | Paint, primary exterior, Dark Green | 1998–1999 | Factory-verified | |
| 50L | Paint, secondary exterior, Olympic White | 1998 | Factory-verified | |
| 50U | Paint, primary exterior, Olympic White | 1998–1999 | Factory-verified | |
| 51L | Paint, secondary exterior, Dark Toreador Metallic | 1998–1999 | Factory-verified | |
| 51U | Paint, primary exterior, Dark Toreador Metallic | 1998–1999 | the 1999 list prints 51u, lower case | Factory-verified |
| 552 | Paint, secondary exterior, Light Autumnwood Metallic | 1999 | GM prints "Autumwind"; GM's other lists print Autumnwood | Factory-verified |
| 60L | Paint, secondary exterior | 1999 | the 1999 list prints 6OL; GM's other lists print 60L (Gold Metallic there) | Factory-verified |
| 60U | Paint, primary exterior, Gold Metallic | 1999 | the 1999 list prints 6OU; 60U in GM's other lists | Factory-verified |
| 61U | Paint, primary exterior, Tan | 1998–1999 | Factory-verified | |
| 65L | Paint, secondary exterior, Smokey Caramel Metallic | 1998–1999 | the 1998 list prints Carmel and the 1999 list Camel; GM's other lists print Carmel/Caramel | Factory-verified |
| 65U | Paint, primary exterior, Smokey Caramel Metallic | 1998–1999 | the 1998 and 1999 lists print Carmel; one other list prints Caramel | Factory-verified |
| 68U | Paint, primary exterior, Meadow Green Metallic | 1999 | Factory-verified | |
| 69L | Paint, secondary exterior, Copper Metallic | 1998–1999 | Factory-verified | |
| 69U | Paint, primary exterior, Copper Metallic | 1998–1999 | Factory-verified | |
| 71U | Paint, primary exterior, Red Orange | 1998–1999 | Factory-verified | |
| 72U | Paint, primary exterior, Standard Red | 1998–1999 | Factory-verified | |
| 74L | Paint, secondary exterior, Victory Red | 1998–1999 | Factory-verified | |
| 74U | Paint, primary exterior, Victory Red | 1998–1999 | the 1999 list prints Victor; the 1998 list and GM's other lists print Victory | Factory-verified |
| 90U | Paint, primary exterior, Gray Metallic | 1998–1999 | Factory-verified | |
| 91L | Paint, secondary exterior, Dark Argent | 1998–1999 | Factory-verified | |
| TGK | Color combination, solid, special paint | 1999 | Factory-verified | |
| TGL | Color combination, two tone, special paint | 1999 | Factory-verified | |
| ZY1 | Color combination, solid | 1998–1999 | Factory-verified | |
| ZY2 | Color combination, two tone | 1998–1999 | Factory-verified | |
| ZY4 | Color combination, deluxe two tone | 1998–1999 | Factory-verified | |
| Interior Trim | ||||
| 132 | Trim combination, leather, Light Gray | 1998–1999 | Factory-verified | |
| 13C | Trim combination, cloth, Light Gray | 1998–1999 | GM prints "Colth" | Factory-verified |
| 13D | Trim combination, cloth, Light Gray | 1998–1999 | Factory-verified | |
| 13I | Interior color, Light Gray | 1998–1999 | Factory-verified | |
| 13V | Trim combination, vinyl, Light Gray | 1998–1999 | Factory-verified | |
| 262 | Trim combination, leather, Navy | 1998–1999 | GM prints "TrimCombination" | Factory-verified |
| 26B | Trim combination, cloth, Navy | 1999 | Factory-verified | |
| 26C | Trim combination, cloth, Navy | 1998–1999 | Factory-verified | |
| 26D | Trim combination, cloth, Navy | 1998–1999 | Factory-verified | |
| 26I | Interior trim, Navy | 1998–1999 | Factory-verified | |
| 26V | Trim combination, vinyl, Navy | 1998–1999 | Factory-verified | |
| 522 | Trim combination, leather, Light Neutral | 1998–1999 | GM prints "Combinatiion" | Factory-verified |
| 52B | Trim combination, cloth, Light Neutral | 1999 | Factory-verified | |
| 52C | Trim combination, cloth, Light Neutral | 1998–1999 | Factory-verified | |
| 52D | Trim combination, cloth, Light Neutral | 1998–1999 | Factory-verified | |
| 52I | Interior trim, Light Neutral | 1998–1999 | Factory-verified | |
| 52V | Trim combination, vinyl, Light Neutral | 1998–1999 | Factory-verified | |
| 792 | Trim combination, leather, Ruby Red | 1998–1999 | Factory-verified | |
| 79C | Trim combination, cloth, Ruby Red | 1998–1999 | Factory-verified | |
| 79D | Trim combination, cloth, Ruby Red | 1998–1999 | Factory-verified | |
| 79I | Interior trim, Ruby Red | 1998–1999 | Factory-verified | |
| 79V | Trim combination, vinyl, Ruby Red | 1998–1999 | Factory-verified | |
| Internal / Process | ||||
| ARL internal | Plant, Arlington, TX, USA | 1999 | Arlington is an assembly plant Wikipedia names | Factory-verified |
| B4L internal | Label, price, refer to geographic chart | 1998–1999 | Factory-verified | |
| BAG internal | Parts package, export | 1998–1999 | Factory-verified | |
| CKD internal | Vehicle, completely knocked down | 1999 | Factory-verified | |
| EXP internal | Export, international sales | 1998 | Factory-verified | |
| FE9 internal | Certification, emission, federal | 1998 | Factory-verified | |
| GAM internal | Vehicle, government | 1998 | Factory-verified | |
| JAN internal | Plant, Janesville, WI, GM NATG | 1998–1999 | Janesville is an assembly plant Wikipedia names | Factory-verified |
| KFU internal | Fleet incentive, Consumers Energy | 1999 | Factory-verified | |
| NA1 internal | Emission system, GVW less than 8500 lbs | 1998–1999 | Factory-verified | |
| NA4 internal | Emission system, GVW above 8500 lbs | 1998–1999 | Factory-verified | |
| NA5 internal | Emission system, federal, Tier 0 | 1998 | Factory-verified | |
| NB2 internal | Emission system, California, Tier 0 | 1998 | Factory-verified | |
| NB6 internal | Emission system, California, Tier 1 | 1998–1999 | Factory-verified | |
| NB8 internal | Emission override, California system | 1998 | Factory-verified | |
| NC1 internal | Emission system, California, LEV | 1998–1999 | Factory-verified | |
| NC7 internal | Emission override, federal system | 1998 | Factory-verified | |
| NF2 internal | Emission system, federal, Tier 1 | 1998–1999 | Factory-verified | |
| NG1 internal | Certification, emission, geographically restricted registration | 1998 | Factory-verified | |
| NN8 internal | Emission override, unleaded fuel, export | 1998–1999 | Factory-verified | |
| SGB internal | Form, advanced broadcast document | 1999 | Factory-verified | |
| TFE internal | Sales incentive, commitment plus | 1999 | Factory-verified | |
| TR2 internal | Export, unique | 1999 | Factory-verified | |
| V60 internal | Vehicle statement, Gulf States Organization, incomplete vehicle | 1998–1999 | Factory-verified | |
| V73 internal | Vehicle statement, US/Canada | 1998–1999 | Factory-verified | |
| V78 internal | Vehicle statement, delete | 1998–1999 | Factory-verified | |
| V87 internal | Vehicle statement, Gulf States Organization | 1998–1999 | Factory-verified | |
| V98 internal | Factory delivery processing | 1998–1999 | Factory-verified | |
| VB1 internal | Label, shipping, Japan | 1998–1999 | Factory-verified | |
| VC0 internal | Vehicle label, noise control information | 1998–1999 | Factory-verified | |
| VC4 internal | Label, price and fuel economy, Puerto Rico and Virgin Islands | 1998–1999 | GM prints "Lable" | Factory-verified |
| VC5 internal | Label, shipping, except for US, US possessions or Japan | 1998–1999 | Factory-verified | |
| VC7 internal | Label, price and fuel economy, Guam | 1998–1999 | Factory-verified | |
| VG8 internal | Label, vehicle, notice to buyer | 1998–1999 | GM prints "Lable" | Factory-verified |
| VGC internal | Paint etch protector film | 1999 | Factory-verified | |
| VK5 internal | Seat, temporary, for shipping | 1998–1999 | Factory-verified | |
| VL3 internal | Label, mirror, outside warning | 1998 | Factory-verified | |
| VPH internal | Vehicle preparation, overseas delivery | 1998–1999 | Factory-verified | |
| VR6 internal | Hook, tie down | 1998–1999 | Factory-verified | |
| VS7 internal | Vehicle, non-saleable | 1998 | Factory-verified | |
| VXS internal | Vehicle, complete | 1999 | Factory-verified | |
| VXT internal | Vehicle, incomplete | 1999 | Factory-verified | |
| W99 internal | Equipment, miscellaneous, for Venezuela | 1998–1999 | Factory-verified | |
| WD1 internal | Identification, pilot vehicle | 1998 | Factory-verified | |
| X78 internal | Equipment, Colombia | 1999 | Factory-verified | |
| X81 internal | Sales incentive, price leader | 1998 | Factory-verified | |
| YA7 internal | Assembly line emission test, California | 1998 | Factory-verified | |
| YD3 internal | Axle, front, for scheduling GVW plate | 1998 | Factory-verified | |
| YD7 internal | Axle, for scheduling GVW plate, used with R05 | 1998 | Factory-verified | |
| YF4 internal | Vehicle engineering, hold order | 1998 | Factory-verified | |
| YF5 internal | Emission certificate, California | 1998 | Factory-verified | |
| Z49 internal | Export, Canadian modified mandatory base equipment | 1998–1999 | Factory-verified | |
| Z88 internal | Conversion name plate, GMC Truck | 1998–1999 | market brand code | Factory-verified |
| ZA6 internal | Package, price leader, Canadian | 1998 | Factory-verified | |
| ZA7 internal | Package, value leader, Canadian | 1998 | Factory-verified | |
| ZK3 internal | Design, pull-ahead, 99 | 1999 | Factory-verified | |
| ZN1 internal | Sales package, export | 1999 | Factory-verified | |
Source document: gmc/yukon-gmt400.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.