Cadillac · 2005-2011
STS — Sigma (2005–2011)
sts · sts-v · sts-v8 · sts base · sts luxury · sts luxury performance · sts rhd
264 option rows 264 RPO codes 5 model years
100% Factory-verified
- ✓ Factory-verified · 264
- ● Confirmed · 0
- ◑ Single-source · 0
- ⚠ Disputed · 0
Applicable options
Documented RPO codes
Model year
| Code | Option | Years | Notes & factory source | Confidence |
|---|---|---|---|---|
| Engines | ||||
| LC3 | Engine, gas, 8 cylinder, 4.4L, multiport fuel injection, V8, supercharged, aluminum, DOHC, GM | 2006–2009 | only in: STS-V (Wikipedia). | Factory-verified |
| LH2 | Engine, gas, 8 cylinder, 4.6L, sequential fuel injection, V8, DOHC, high output, aluminum, GM | 2005–2009 | The 2009 list prints "ALUM" and a hyphen after "Engine". | Factory-verified |
| LLT | Engine, gas, 6 cylinder, 3.6L, SIDI, V6, aluminum, 60 degrees, 224 kW, GM | 2008, 2009 | The 2008 list omits "224 KW". | Factory-verified |
| LP1 | Engine, gas, 6 cylinder, 2.8L, sequential fuel injection, V6, DOHC, aluminum, 60 degrees, GM | 2007–2009 | Factory-verified | |
| LY7 | Engine, gas, 6 cylinder, 3.6L, sequential fuel injection, V6, aluminum, 60 degrees, GM | 2005–2009 | Factory-verified | |
| Transmissions | ||||
| M22 | Transmission, automatic 5 speed, HMD, 5L50-E, electronic, O/D | 2005, 2006 | The 2005 and 2006 STS lists print "6 Speed" with 5L50-E; the 2005 CTS list and most of GM's lists print 5 speed, which is used here. Pairs with the 4.6L LH2. | Factory-verified |
| M82 | Transmission, automatic 5 speed, HMD, 5L40-E, electronic | 2005–2009 | Factory-verified | |
| MV3 | Transmission, automatic 5 speed, HMD, 5L50-E PTU, electronic, O/D | 2005, 2006 | Pairs with the 4.6L LH2. | Factory-verified |
| MX0 | Merchandised transmission, automatic, provisions, O/D | 2006–2009 | Factory-verified | |
| MX5 | Transmission, automatic 5 speed, HMD, 5L40-E PTU, O/D | 2006, 2007 | Factory-verified | |
| MX7 | Merchandised transmission, automatic, provisions, O/D, all wheel drive | 2006–2009 | Factory-verified | |
| MYB | Transmission, automatic 6 speed, HMD, 6L50 | 2007–2009 | Factory-verified | |
| MYC | Transmission, automatic 6 speed, HMD, 6L80 | 2006–2009 | only in: STS-V (Wikipedia). | Factory-verified |
| Axles | ||||
| G80 | Axle, Positraction limited slip | 2005–2009 | Factory-verified | |
| GU2 | Axle, rear, 2.73 ratio | 2005–2009 | Factory-verified | |
| GU5 | Axle, rear, 3.23 ratio | 2005–2009 | Factory-verified | |
| GU6 | Axle, rear, 3.42 ratio | 2005–2009 | Factory-verified | |
| Packages & Trims | ||||
| W21 | Appearance package, Cadillac Platinum Edition | 2007–2009 | Factory-verified | |
| Y41 | Sales package, Cadillac, luxury level 002 | 2008 | Factory-verified | |
| Y48 | Sales package, Cadillac, international luxury 002 | 2007–2009 | Factory-verified | |
| Y53 | Sales package, Cadillac, technology driver awareness | 2008, 2009 | The 2008 list omits "Cadillac". | Factory-verified |
| Equipment | ||||
| A26 | Window, European glazing, all | 2005–2009 | Factory-verified | |
| A45 | Memory, seat adjuster and mirror, power, driver and personalization | 2005–2009 | Factory-verified | |
| A82 | Restraint, head | 2005–2009 | Factory-verified | |
| AE5 | Lock control, entry, remote entry, low power, start | 2005–2009 | The 2009 list adds "Do not use after 2009 model year". | Factory-verified |
| AHK | Control, seat, rear, power lumbar, massage | 2007–2009 | Factory-verified | |
| AL0 | Sensor indicator, inflatable restraint, front passenger/child presence detector | 2007–2009 | The lists print "Sender Indicator"; GM's other lists print "Sensor Indicator", which is used here. | Factory-verified |
| AL2 | Control, seat, power lumbar | 2005–2009 | Factory-verified | |
| AL9 | Control, seat, power lumbar, driver | 2009 | Factory-verified | |
| AN6 | Restraint provisions, child, Australia/New Zealand | 2008 | Factory-verified | |
| AP9 | Net, convenience | 2006–2009 | Factory-verified | |
| AQ9 | Seat, front, bucket, luxury | 2005–2009 | Factory-verified | |
| ARB | Equipment, body structure reinforcement | 2006–2009 | Factory-verified | |
| ASG | Seat, rear, bench 40/20/40, with multifunctional armrest | 2007–2009 | The lists print "RR", read as rear. | Factory-verified |
| ASH | Seat, rear, bucket 40/0/40, with integrated functional console | 2007–2009 | The lists print "RR", read as rear. | Factory-verified |
| AT8 | Restraint provisions, child, rear seat, rear facing | 2007–2009 | The 2007 and 2008 lists print "RR Seat, RR Facing", read as rear. | Factory-verified |
| AT9 | Control, seat, power lumbar, passenger | 2009 | Factory-verified | |
| AU0 | Lock control, entry, remote entry | 2006, 2007 | Factory-verified | |
| AU8 | Lock control, entry, remote entry, specific frequency | 2005–2008 | Factory-verified | |
| AX4 | Restraint conversion, seat, manual, European | 2005–2009 | Factory-verified | |
| AY0 | Restraint system, seat, inflatable, driver and passenger, front, side, roof side | 2005, 2007, 2009 | The 2005 list prints "Driver & Pass, Front, Side". | Factory-verified |
| B18 | Ornamentation, interior, deluxe | 2007–2009 | Factory-verified | |
| B19 | Ornamentation, interior, customs | 2005–2009 | Factory-verified | |
| B20 | Ornamentation, interior, luxury | 2005–2009 | Factory-verified | |
| B57 | Ornamentation, exterior, deluxe | 2005–2009 | The 2005 and 2006 lists print "Ornamentation Extra Deluxe"; the 2009 list and GM's other lists print "Exterior, Deluxe". | Factory-verified |
| BC8 | Ornamentation, interior, driver map pockets | 2009 | Factory-verified | |
| C9B | Lamp, interior, ambient, door | 2009 | Factory-verified | |
| C9J | Lamp, interior, ambient, instrument panel | 2009 | Factory-verified | |
| CE1 | Wiper system, windshield, pulse, moisture sensitive | 2005–2009 | The 2005 and 2006 lists print "Washer System"; the 2007-2009 lists print "Wiper System". | Factory-verified |
| CE4 | Washer, headlamp, high pressure | 2005–2009 | Factory-verified | |
| CF5 | Roof, sun, glass, sliding, electric | 2005–2009 | Factory-verified | |
| CFN | Roof, sun, glass, sliding, electric, not installed | 2007–2009 | Factory-verified | |
| CJ2 | HVAC system, air conditioner, front, automatic temperature control, auxiliary temperature control | 2005–2008 | Factory-verified | |
| D24 | Mirror, outside left-hand and right-hand, remote control, electric, heated, light sensitive, power folding, color | 2007–2009 | The 2009 list omits "color". | Factory-verified |
| D26 | Mirror, outside left-hand and right-hand, remote control, electric, heated, power folding | 2009 | Factory-verified | |
| DC5 | Mirror, inside rear vanity, headlining, illuminated | 2009 | Factory-verified | |
| DD7 | Mirror, inside rearview, light sensitive, compass | 2005–2009 | Factory-verified | |
| DD8 | Mirror, inside rearview, light sensitive | 2005–2009 | Factory-verified | |
| DL7 | Mirror, outside left-hand and right-hand, remote control, electric, heated, power folding, color | 2005–2009 | Factory-verified | |
| DR2 | Mirror, outside left-hand and right-hand, remote control, electric, heated, light sensitive, manual folding, color | 2005–2009 | Factory-verified | |
| DT4 | Ashtray, cigarette lighter | 2005–2009 | Factory-verified | |
| E5A | Chassis, retuned | 2007–2009 | The 2007-2009 lists print "Returned"; GM's other lists print "Retuned", which is used here. | Factory-verified |
| F55 | Chassis, continuously variable real time damping, magneto rheological | 2005–2009 | Factory-verified | |
| FE1 | Suspension system, soft ride | 2005–2009 | Factory-verified | |
| FE3 | Suspension system, sport | 2005–2009 | The 2005 and 2006 lists print "Soft Ride" (the FE1 wording); the 2007-2009 lists and GM's other lists print Sport, which is used here. | Factory-verified |
| FE4 | Suspension system, special ride and handling | 2006–2009 | Factory-verified | |
| G64 | Level control, automatic, self-adjusting | 2009 | Factory-verified | |
| GME | Ornamentation, exterior, GM Mark of Excellence | 2006 | Factory-verified | |
| J56 | Brake system, power, front and rear disc, antilock, front and rear wheel, heavy duty | 2006–2009 | Factory-verified | |
| JE2 | Brake lining, performance driving | 2005–2007 | Factory-verified | |
| JE5 | Brake system, power, antilock, front and rear wheel | 2005–2009 | Factory-verified | |
| JL4 | Control, active brake | 2005, 2006 | Factory-verified | |
| JL7 | Control, active brake, version 3.0 | 2008 | Factory-verified | |
| JL9 | Brake system, power, front and rear disc, antilock, front and rear wheel | 2005–2009 | Factory-verified | |
| JNG | Shaft, propeller, painted | 2005–2009 | Factory-verified | |
| K05 | Heater, engine block | 2005–2009 | Factory-verified | |
| K14 | Filter, air, automatic recirculating | 2005–2009 | Factory-verified | |
| K59 | Cruise control, automatic, adaptive | 2005–2009 | Factory-verified | |
| KA1 | Heater, seat, front | 2005–2009 | Factory-verified | |
| KA3 | Heater, engine block, 220V | 2005–2009 | Factory-verified | |
| KA6 | Heater, seat, rear | 2005–2009 | Factory-verified | |
| KB6 | Heater, seat, cooling, front | 2005–2009 | Factory-verified | |
| KC4 | Cooling system, engine oil | 2007–2009 | Factory-verified | |
| KD5 | Heater, seat, cooling, rear | 2007–2009 | Factory-verified | |
| KG4 | Generator, 150 amp | 2005–2009 | Factory-verified | |
| KNR | Cooling system, axle | 2007–2009 | Factory-verified | |
| KW7 | Generator, 170 amp | 2007–2009 | Factory-verified | |
| MTF | Provision, fire extinguisher mounting | 2005–2009 | Factory-verified | |
| N05 | Lock control, fuel filler cap | 2005–2009 | Factory-verified | |
| N30 | Steering wheel, deluxe | 2005, 2006 | Factory-verified | |
| N31 | Steering wheel, heated | 2005–2009 | Factory-verified | |
| N87 | Wheel, 18 x 8, aluminum | 2005–2009 | Factory-verified | |
| N88 | Wheel, 17 x 7.5, aluminum, premium | 2005–2009 | Factory-verified | |
| N93 | Wheel, 17 x 7.5, aluminum | 2006–2009 | Factory-verified | |
| NP5 | Steering wheel, leather wrapped | 2005–2009 | Factory-verified | |
| NR7 | Steering wheel, leather wrapped, heated | 2005–2009 | Factory-verified | |
| NR8 | Steering wheel, leather and wood, 3 spokes | 2007 | Factory-verified | |
| NV7 | Steering, power, variable effort | 2005–2009 | Factory-verified | |
| P32 | Wheel, 18 x 8.5, aluminum, painted | 2006–2009 | Factory-verified | |
| P40 | Wheel, 18 x 8, aluminum, sport | 2008, 2009 | The 2008 list prints "Chromed"; the 2009 list and GM's other lists print Sport, which is used here. | Factory-verified |
| P73 | Wheel, 18 x 8.5, chrome, flanged | 2007–2009 | Factory-verified | |
| PB4 | Lock control, wheel | 2006–2009 | Factory-verified | |
| PD5 | Wheel, 18 x 8, aluminum, chromed | 2007, 2008 | Factory-verified | |
| PGK | Wheel, 18 x 8, aluminum, chrome, 14 spokes | 2009 | Factory-verified | |
| PTB | Wheel, 17 x 7.5, aluminum, polished | 2009 | Factory-verified | |
| Q11 | Tire, all, P235/50R17 front and P255/45R17 rear | 2005–2008 | Factory-verified | |
| Q12 | Tire, all, P235/50R18 front and P255/45R18 rear | 2005–2009 | Factory-verified | |
| Q13 | Wheel, 17 x 7.5 front and 17 x 8 rear, polished | 2005–2008 | Factory-verified | |
| Q14 | Wheel, 17 x 7.5 front and 17 x 8 rear, painted | 2005–2008 | Factory-verified | |
| Q19 | Tire, all, P255/45R18 front and P275/40R19 rear EMT | 2006–2009 | Factory-verified | |
| Q20 | Wheel, 18 x 8.5 front and 19 x 9.5 rear | 2006–2009 | Factory-verified | |
| Q9Y | Wheel, 18 x 8, aluminum, polished, sport | 2009 | Factory-verified | |
| QAF | Tire, all, 255/45ZR18-99Y BW TL HW4 | 2006–2009 | The list prints the size without the P. | Factory-verified |
| QCH | Tire, all, 235/55R17-98H BW R/PE ST TL AL3 | 2007–2009 | The list prints the size without the P. | Factory-verified |
| QF8 | Wheel, 18 x 8, aluminum, polished | 2006, 2007, 2009 | The 2006 list prints "Wheel 18 x 8, Aluminum" without polished. | Factory-verified |
| QKP | Tire, all, P235/50R17-95S BW R/PE ST TL ALS | 2005–2009 | Factory-verified | |
| QKS | Tire, all, P235/50R17-95V BW R/PE ST TL AL3 | 2008, 2009 | Factory-verified | |
| T2H | Ornamentation, exterior, export unique requirements | 2005 | Factory-verified | |
| T2J | Ornamentation, interior, export unique requirements | 2006, 2008, 2009 | The 2009 list adds "(AOS Display)". | Factory-verified |
| T43 | Spoiler, rear | 2005–2009 | Factory-verified | |
| T62 | Lighting, daytime running | 2005, 2006 | The 2005 and 2006 lists print the daytime running lighting itself; the 2007-2009 lists print it as a delete (separate row). | Factory-verified |
| T62 | Lighting, daytime running, delete | 2007–2009 | The 2005 and 2006 lists print the plain daytime running lighting (separate row). | Factory-verified |
| T65 | Lamp system, daytime running, export | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| T79 | Lamp, fog, rear | 2005, 2007–2009 | The lists print "RR", read as rear. | Factory-verified |
| T84 | Headlamps, right-hand rule of the road, E mark | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| T90 | Lamp, signaling and marker, export | 2005, 2006 | Factory-verified | |
| TQ5 | Control, intelligent high beam | 2005–2009 | Factory-verified | |
| TR0 | Lamp, interior, roof, rear, courtesy and dual reading | 2009 | Factory-verified | |
| TR7 | Headlamps, control, leveling system, automatic | 2005–2009 | Factory-verified | |
| TT6 | Headlamps, high intensity discharge | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| TT7 | Headlamps, high intensity discharge, left-hand rule of road | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| TT8 | Headlamps, high intensity discharge, right-hand rule of road | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| TUM | Alarm, seat belt warning, additional | 2008, 2009 | Factory-verified | |
| U03 | Horn, noise regulation | 2009 | Factory-verified | |
| U19 | Speedometer, instrument, kilometers and miles, kilometer odometer | 2005–2009 | Factory-verified | |
| U2J | Digital audio system, S-band, not installed | 2006–2009 | Factory-verified | |
| U2K | Digital audio system, S-band | 2005–2009 | Factory-verified | |
| U2L | Digital audio system, L-band | 2005, 2006 | Factory-verified | |
| U30 | Cluster, instrument, tachometer, clock | 2005–2009 | Factory-verified | |
| UA2 | Theft deterrent system, export specific | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| UA6 | Theft deterrent system | 2005–2009 | The 2009 list adds "Do not use after 2009 Global/New major programs". | Factory-verified |
| UA7 | Theft deterrent system, export specific, variation 2 | 2007, 2008 | The lists print "Var #02". | Factory-verified |
| UC2 | Speedometer, instrument, kilometers and miles, kilometer odometer, positive bias | 2007–2009 | Factory-verified | |
| UC8 | Speaker system 11, premium | 2009 | Factory-verified | |
| UD4 | Alarm, vehicle speed, 120 km/h | 2007–2009 | Factory-verified | |
| UD7 | Sensor indicator, rear parking assist | 2005, 2006 | Factory-verified | |
| UDA | Communication equipment, vehicle GPS 1, deactivated | 2007 | Factory-verified | |
| UE1 | Communication system, vehicle, GPS 1 | 2005–2009 | Factory-verified | |
| UFL | Sensor indicator, lane departure warning | 2008, 2009 | Factory-verified | |
| UFT | Sensor indicator, side obstacle detection | 2008, 2009 | Factory-verified | |
| UG1 | Garage door opener, universal | 2005–2009 | Factory-verified | |
| UH3 | Indicator, low tire pressure, variation 2 | 2005–2009 | Factory-verified | |
| UHB | Lock control, entry, remote entry passive, remote start, specific frequency | 2007–2009 | The 2009 list adds "Do not use after 2009 model year". | Factory-verified |
| UJ6 | Indicator, low tire pressure | 2005–2009 | Factory-verified | |
| UJ9 | Indicator, low tire pressure, variation 1 | 2005–2009 | Factory-verified | |
| UL1 | Frequencies, Australia/New Zealand | 2008 | Factory-verified | |
| UQ7 | Speaker system, premium performance, enhanced audio, Bose | 2005 | Factory-verified | |
| UQY | Infotainment system 018 | 2008 | Factory-verified | |
| UQZ | Infotainment system 19 | 2009 | Factory-verified | |
| UV6 | Display, head up | 2005–2009 | Factory-verified | |
| UX8 | Speaker system 8, deluxe | 2005–2009 | Factory-verified | |
| UY5 | Speaker system 15, deluxe | 2005–2009 | Factory-verified | |
| V03 | Cooling system, extra capacity | 2005–2009 | Factory-verified | |
| V08 | Cooling system, heavy duty | 2005–2009 | Factory-verified | |
| V09 | Cooling system, powertrain, high ambient | 2006, 2007 | Factory-verified | |
| V76 | Hook, tow | 2005–2009 | Factory-verified | |
| V92 | Trailer provisions | 2005–2009 | Factory-verified | |
| VJ1 | License plate, rear mounting package, Japanese | 2005, 2007–2009 | Factory-verified | |
| VK3 | License plate, front mounting package | 2008, 2009 | Factory-verified | |
| VL4 | License plate, front mounting package, EEC | 2005–2009 | Factory-verified | |
| VL6 | License plate, front mounting package, Japanese | 2005–2009 | Factory-verified | |
| VLF | License plate, front mounting package, China | 2007–2009 | Factory-verified | |
| VMA | License plate, front mounting package, Korea | 2005–2007 | Factory-verified | |
| VP6 | Noise control | 2005–2009 | Factory-verified | |
| VPM | Modification, noise control, Mexico | 2006–2009 | Factory-verified | |
| VR5 | Provisions, slow vehicle warning triangle mounting | 2005–2009 | Factory-verified | |
| VS1 | First aid kit, vehicle | 2009 | Factory-verified | |
| VU9 | Flashlight, mounting provisions | 2005, 2006 | Factory-verified | |
| W11 | Navigation disc data, nav data 1 | 2006–2009 | Factory-verified | |
| W12 | Navigation disc data, nav data 2 | 2006–2009 | Factory-verified | |
| XA7 | Washer nozzles, heated, windshield | 2005–2009 | Factory-verified | |
| YQ1 | Infotainment system 009 | 2005–2009 | The 2009 list prints "9". | Factory-verified |
| YQ2 | Infotainment system 010 | 2005–2009 | The 2009 list prints "10". | Factory-verified |
| YQ3 | Infotainment system 011 | 2005 | Factory-verified | |
| YQ4 | Infotainment system 012 | 2005–2009 | The 2009 list prints "12". | Factory-verified |
| YQ5 | Infotainment system 13 | 2009 | Factory-verified | |
| YQ6 | Infotainment system 014 | 2005–2009 | The 2009 list prints "14". | Factory-verified |
| YQ7 | Infotainment system 015 | 2005–2009 | The 2009 list prints "15". | Factory-verified |
| YQ8 | Infotainment system 016 | 2007–2009 | The 2009 list prints "16". | Factory-verified |
| YQ9 | Infotainment system 017 | 2007–2009 | The 2009 list prints "17". | Factory-verified |
| Z5X | Mirror provisions, Arabic language | 2005–2009 | Factory-verified | |
| Z5Y | Mirror provisions, outside, etched warning | 2005–2009 | Factory-verified | |
| Interior Trim | ||||
| 131 | Interior trim, Light Gray/Ebony | 2007 | GM marks it "(1) (06)". | Factory-verified |
| 191 | Interior trim, Ebony | 2007 | GM marks it "(1) (00)". | Factory-verified |
| 311 | Interior trim, Ebony/Light Cashmere | 2007 | GM marks it "(1) (07)". | Factory-verified |
| 321 | Interior trim, Medium Dark Cashmere | 2007 | GM marks it "(04)". | Factory-verified |
| 391 | Interior trim, Cocoa/Light Cashmere | 2007 | GM marks it "(1) (08)". | Factory-verified |
| 491 | Interior trim, Ebony/Saddle Brown | 2007 | GM marks it "(1) (07)". | Factory-verified |
| 671 | Interior trim, Tango Red/Ebony | 2007 | GM marks it "(1) (07)". | Factory-verified |
| IL2 | Trim, interior design L2 | 2008 | Interior design code. | Factory-verified |
| IL3 | Trim, interior design L3 | 2008 | Interior design code. | Factory-verified |
| IL4 | Trim, interior design L4 | 2008 | Interior design code. | Factory-verified |
| Internal / Process | ||||
| B3V internal | Test, extended water | 2007–2009 | Factory-verified | |
| BAG internal | Parts package, export | 2005–2009 | Factory-verified | |
| CKD internal | Vehicle, completely knocked down (CKD) | 2007–2009 | Factory-verified | |
| DCP internal | Processing, directions and connections service package | 2009 | Factory-verified | |
| DL5 internal | Decal, roadside service information | 2006, 2007 | Factory-verified | |
| FE9 internal | Certification, emission, federal | 2007–2009 | Factory-verified | |
| JJA internal | PT dress subassembly installed (modular optimization method only) | 2005–2009 | Factory-verified | |
| JJB internal | PT dress subassembly, not installed (modular optimization method only) | 2008, 2009 | Factory-verified | |
| JJC internal | Instrument panel assembly, installed (modular optimization method only) | 2007–2009 | Factory-verified | |
| JJD internal | Instrument panel assembly, not installed (modular optimization method only) | 2007–2009 | Factory-verified | |
| JJJ internal | Suspension, front, installed (modular optimization method only) | 2007–2009 | Factory-verified | |
| JJK internal | Suspension, rear, installed (modular optimization method only) | 2007–2009 | Factory-verified | |
| JJL internal | Suspension, front, not installed (modular optimization method only) | 2007–2009 | Factory-verified | |
| JJM internal | Suspension, rear, not installed (modular optimization method only) | 2007–2009 | Factory-verified | |
| LAL internal | Plant code, Lansing, MI, USA, Grand River | 2005, 2007–2009 | The 2007-2009 lists print the plant as "Lansing, Mi USA (Grand River)". | Factory-verified |
| NA3 internal | Emission system, Japan | 2005–2009 | Factory-verified | |
| NC1 internal | Emission system, California, LEV | 2005, 2006 | Factory-verified | |
| NE1 internal | Certification, emission, geographically restricted registration for vehicles up to 14,000 lbs GVW | 2006–2009 | The lists add "Use 2003 Model Year". | Factory-verified |
| NF4 internal | Emission system, clean fuel fleet | 2006 | Factory-verified | |
| NF9 internal | Emission system, general, unleaded | 2005, 2006 | The 2007 list prints a different meaning (separate row). | Factory-verified |
| NF9 internal | Emission system, general, OBD MIL suppression | 2007 | The 2005 and 2006 lists print general unleaded (separate row). | Factory-verified |
| NG1 internal | Certification, emission, geographically restricted registration for vehicles up to 6,000 lbs GVW | 2006 | Factory-verified | |
| NQU internal | Emission system, Korean, ULEV | 2009 | Factory-verified | |
| NT4 internal | Emission system, EEC 05 | 2005–2009 | Factory-verified | |
| NT7 internal | Emission system, federal, Tier 2 | 2005–2009 | Factory-verified | |
| NT9 internal | Emission system, federal, Tier 2 phase-out | 2005–2008 | Factory-verified | |
| NU1 internal | Emission system, California, LEV2 | 2005–2007, 2009 | Factory-verified | |
| NU2 internal | Emission system, California, ULEV2 | 2007 | Factory-verified | |
| NU4 internal | Emission system, California, LEV2 plus | 2005, 2006 | Factory-verified | |
| NU5 internal | Emission system, California, BIN 4 | 2006–2008 | Factory-verified | |
| NUA internal | Emission system, California, 150K LEV2 | 2008 | Factory-verified | |
| SHC internal | Plant code, Shanghai, China | 2009 | Factory-verified | |
| THO internal | Fleet sales, Penske GO no. G1667, G1668, G1674, G1676 | 2009 | Factory-verified | |
| V4X internal | Model conversion, GMX295, STS V8 | 2006–2009 | Factory-verified | |
| V73 internal | Vehicle statement, USA/Canada | 2005–2009 | Factory-verified | |
| V78 internal | Vehicle statement, delete | 2005–2009 | The 2005 and 2006 lists print only "Vehicle Statement"; the 2007-2009 lists add "Delete". | Factory-verified |
| V87 internal | Vehicle statement, Gulf States Organization | 2005–2009 | Factory-verified | |
| VA7 internal | Language label, French | 2007–2009 | Factory-verified | |
| VB1 internal | Label, shipping, Japan | 2005–2009 | Factory-verified | |
| VBX internal | Language label, Arabic | 2005–2009 | Factory-verified | |
| VC4 internal | Label, price/fuel economy, Puerto Rico and Virgin Islands | 2005–2008 | Factory-verified | |
| VC5 internal | Label, shipping, except US, US possessions, or Japan | 2005–2009 | Factory-verified | |
| VE7 internal | Plate, vehicle identification, Australia/New Zealand | 2008 | Factory-verified | |
| VG1 internal | Protector, underhood compound, corrosion preventive, water based, clear | 2007–2009 | Factory-verified | |
| VG6 internal | Label, information, bumper impact, 5 mph, California | 2007–2009 | Factory-verified | |
| VG8 internal | Vehicle label, notice to buyer | 2005, 2006 | Factory-verified | |
| VG9 internal | Protector, wax, exterior body | 2007–2009 | Factory-verified | |
| VH3 internal | Label, information, bumper impact, 5 mph, Hawaii | 2007–2009 | Factory-verified | |
| VH5 internal | Plate, vehicle identification | 2005–2009 | Factory-verified | |
| VH9 internal | Envelope, owner information manual | 2008, 2009 | The 2008 list prints "Info Man". | Factory-verified |
| VJ2 internal | Label, export headlamp adjust | 2005–2009 | Factory-verified | |
| VJ4 internal | Label, export child seat location | 2005, 2006 | Factory-verified | |
| VKR internal | Modification, requirement, vehicle with lead content | 2009 | Factory-verified | |
| VL2 internal | Label, spare caution, compact spare | 2005–2009 | Factory-verified | |
| VM3 internal | Label, information, consumer, contains bumper impact standard for front 5 mph and rear 5 mph | 2007–2009 | Factory-verified | |
| VT7 internal | Owner's manual, English language | 2008, 2009 | Factory-verified | |
| VZ3 internal | Label, mercury disposal notification | 2005–2009 | Factory-verified | |
| Y7C internal | Conversion, act promoted to zero level | 2007–2009 | Factory-verified | |
| YB1 internal | Plate, engine identification | 2006 | Factory-verified | |
| YF5 internal | Certification, control, electronic throttle | 2007, 2008 | The 2009 list prints California emission certification (separate row). | Factory-verified |
| YF5 internal | Certification, emission, California | 2009 | The 2007 and 2008 lists print electronic throttle control certification (separate row). | Factory-verified |
| Z49 internal | Export Canadian modification, mandatory base equipment | 2005, 2008, 2009 | Factory-verified | |
Source document: cadillac/sts-sigma.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.