← All owner tools · Decode your own SPID label with the GM RPO decoder
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| 001 | P RAT, M RATIO, 3.70 | 1991 | GM sourced |
| 001 | Rat, M Ratio, 3.70 | 1991 | GM dated |
| 002 | P RAT, M RATIO, 4.11 (4 1/9) | 1991 | GM sourced |
| 002 | Rat, M Ratio, 4.11 (4 1/9) | 1991 | GM dated |
| 003 | Rat, M Ratio, 4.33 | 1991 | GM dated |
| 003 | P RAT, M RATIO, 4.33 | 1991 | GM sourced |
| 004 | Rat, M Ratio, 4.78 | 1994 | GM dated |
| 004 | P RAT, M RATIO, 4.78 | 1994 | GM sourced |
| 005 | Rat, M Ratio, 4.56 (4 5/9) | 1991 | GM dated |
| 005 | P RAT, M RATIO, 4.56 (4 5/9) | 1991 | GM sourced |
| 006 | Rat, M Ratio, 4.63 (4 5/8) | 1996 | GM dated |
| 006 | P RAT, M RATIO, 4.63 (4 5/8) | 1996 | GM sourced |
| 007 | Rat, M Ratio, 3.07 | 1997 | GM dated |
| 007 | P RAT, M RATIO, 3.07 | 1997 | GM sourced |
| 008 | Rat, M Ratio, 4.88 | 1996 | GM dated |
| 008 | P RAT, M RATIO, 4.88 | 1996 | GM sourced |
| 009 | Rat, M Ratio, 5.29 | 1991 | GM dated |
| 009 | P RAT, M RATIO, 5.29 | 1991 | GM sourced |
| 00A | Spare wheel upgrade Chevrolet Silverado 1500 | 2022–2023 | GM sourced |
| 00A | Wheel Spare 17 X 8.0, J, Steel, Design 2 | — | Reference |
| 00D | Not Equipped with Climate Control Knob Digital Temperature Display Chevrolet Silverado 1500 | 2022 | Provisional |
| 00G | Not Equipped with Heated Steering Wheel, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00L | Ccl, R Secondary Color, Exterior, Prime | 1989 | GM dated |
| 00L | P CCL, R SECONDARY COLOR, EXTERIOR, PRIME | 1989 | GM sourced |
| 00L | Exterior Color,secondary,prime,union City Body | — | GM dated |
| 00R | Not Equipped with Heated Rear Outboard Seats, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00U | Ccu, M Primary Color, Exterior, Prime | 1989 | GM dated |
| 00U | P CCU, M PRIMARY COLOR, EXTERIOR, PRIME | 1989 | GM sourced |
| 00U | Exterior Color,primary,prime,upper,union City Body | — | GM dated |
| 00V | Not Equipped with Heated or Ventilated Front Seats, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00Y | Not Equipped with Rear Park Assist, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00Z | Not Equipped with Front and Rear Park Assist, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 010 | Rat, M Ratio, 5.43 | 1991 | GM dated |
| 010 | P RAT, M RATIO, 5.43 | 1991 | GM sourced |
| 011 | Rat, M Ratio, 5.57 (5 4/7) | 1991 | GM dated |
| 011 | P RAT, M RATIO, 5.57 (5 4/7) | 1991 | GM sourced |
| 012 | Rat, M Ratio, 5.83 | 1991 | GM dated |
| 012 | P RAT, M RATIO, 5.83 | 1991 | GM sourced |
| 013 | Rat, M Ratio, 3.73 | 1995 | GM dated |
| 013 | P RAT, M RATIO, 3.73 | 1995 | GM sourced |
| 014 | Rat, M Ratio, 6.14 (6 1/7) | 1991 | GM dated |
| 014 | P RAT, M RATIO, 6.14 (6 1/7) | 1991 | GM sourced |
| 015 | Rat, M Ratio, 6.17 | 1991 | GM dated |
| 015 | P RAT, M RATIO, 6.17 | 1991 | GM sourced |
| 016 | Rat, M Ratio, 5.25 | 1991 | GM dated |
| 016 | P RAT, M RATIO, 5.25 | 1991 | GM sourced |
| 017 | Rat, M Ratio, 6.50 | 1991 | GM dated |
| 017 | P RAT, M RATIO, 6.50 | 1991 | GM sourced |
| 018 | Rat, M Ratio, 6.65 | 1989 | GM dated |
| 018 | P RAT, M RATIO, 6.65 | 1989 | GM sourced |
| 019 | Rat, M Ratio, 6.67 | 1989 | GM dated |
| 019 | P RAT, M RATIO, 6.67 | 1989 | GM sourced |
| 01A | Stc, R Stripe Color, Accent, Two Tone, Silver/gunmetal (1995) | 1998 | GM dated |
| 01A | P STC, R STRIPE COLOR, ACCENT, TWO TONE, SILVER/GUNMETAL (1995) | 1998 | GM sourced |
| 01A | Stripe Color Accent, Two Tone, Silver/gunmetal | — | GM dated |
| 01A | Trim Color Seat Jet Black | — | GM dated |
| 01B | Trim Color Seat LT Neutral | — | Reference |
| 01C | Trim Color Seat LT Titanium | — | Reference |
| 01D | Trim Color Seat LT Cashmere | — | Reference |
| 01E | Trim Color Seat DK Titanium | — | Reference |
The full list, A to Z
Showing 401–500 of 592 codes beginning with X. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| XNP | Tire Front 8.00r19.5/d BL R/st ST TL Hwy Michelin (14065888) | — | Reference |
| XNX | P, FTR, M, TIRE FRONT, P225/60R16-97S BL R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XP0 | P, CND, R, CONVENIENCE PKG, CAMPAIGN 97/2 | 1997 | Provisional |
| XP1 | P, FLP, R, FLEET SALES, TAXI CAB | 1997 | GM sourced |
| XP2 | P, CND, R, CONVENIENCE PKG, CAMPAIGN 97/1 | 1997 | Provisional |
| XP3 | P, SALES INCENTIVE, CAMPAIGN LIGHT | 1997 | Provisional |
| XP4 | P, SALES INCENTIVE, CAMPAIGN | 1997 | Provisional |
| XP5 | P, ORNAMENTATION, NAME PLATE "VITA" RR | 1998 | Provisional |
| XP6 | P, ORNAMENTATION, EMBLEM "EUROCUP" | 1997 | Provisional |
| XP7 | P, ORNAMENTATION, NAME PLATE "BARINA" RR | 1998 | GM sourced |
| XP8 | P, MSM, R, MODEL CONVERSION, V8 | 1998 | Provisional |
| XPA | P, FTR, M, TIRE FRONT, P215/70R15-97S WOL PE/ST TL AL2 (HIGH WET/SNOW TRACTION PERFORMANCE) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| XPB | Sales Package Taxi Cab | — | Reference |
| XPE | Tire Front 7.50-16lt/d BL D/pe TT Hwy (362157) | — | Reference |
| XPF | Tire Front 7.50-16lt/d BL D/ny TT Hwy (346989) | — | Reference |
| XPG | Tire Front 7.50-16lt/d BL D/ny TT Oor (346990) | — | Reference |
| XPH | P, FTR, M, TIRE FRONT, 7.50-17/D 8PR BW TT HWY | 1993 | GM sourced |
| XPK | P, FTR, M, TIRE FRONT, P215/70R15-97S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XPL | P, FTR, M, TIRE FRONT, 7.50-16 10PR BL TT | 1997 | Provisional |
| XPO | P, FTR, M, TIRE FRONT, P245/70R17-108S WOL TL ST ALS, 20405 | — | GM sourced |
| XPP | Tire Front P215/65r15/n Wol R/pe ST TL Al3 95h | — | Reference |
| XPR | P, FTR, M, TIRE FRONT, P245/70R17-108S BW TL ST ALS, 20405 | — | GM sourced |
| XPU | P, FTR, M, TIRE FRONT, P215/70R15-97S BW R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XPX | Tire Front P225/60r16-97s BW R/pe ST TL Als | — | Reference |
| XPY | Tire Front 7.50-20/d 8pr BL Bias TT | — | Reference |
| XPZ | Tire Front P235/65r15 Rwl R/pe ST TL Al2 100s | — | Reference |
| XQ0 | P, NPC, M, CONVERSION NAME PLT, EMBLEM "SPOKE" | 1999 | Provisional |
| XQ2 | P, EQUIPMENT, VAUXHALL | 1997 | GM sourced |
| XQ3 | P, EQUIPMENT, PONTIAC, 20408 E, 8 | — | GM sourced |
| XQ4 | P, NPC, M, CONVERSION NAME PLT, "2000" | 1999 | Provisional |
| XQ5 | P, EQC, R, EQUIPMENT ADDITIONAL, NETHERLANDS | 1997 | Provisional |
| XQ6 | P, NPC, M, CONVERSION NAME PLT, EMBLEM "THIS WAY" | 1999 | Provisional |
| XQ7 | P, EQUIPMENT, HOLDEN | 1998 | Provisional |
| XQ8 | P, CKD OPTION, INDONESIA | 1997 | Provisional |
| XQ9 | P, EQUIPMENT, CHEVROLET, 10427 E, 0 | — | Provisional |
| XQG | P, FTR, M, TIRE FRONT, P235/70R15-102V BW R/PE ST TL AL3 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XQK | P, FTR, M, TIRE FRONT, 8.25R16 14PR BL R/ST HWY (OVERSEAS) | 1997 | Provisional |
| XQL | Tire Front 8.25-20.0/e 10pr BL Bias TT | — | Reference |
| XQP | P, FTR, M, TIRE FRONT, 8.25R-20/G 14PR BW R/ST TL OOR | 1991 | Provisional |
| XQQ | P, FTR, M, TIRE FRONT, 8.25R-20 14PR BL R/ST TL HWY 9250KG (OVERSEAS) | 1997 | Provisional |
| XQS | Tire Front 7.50-20/e 10pr BL Bias TT | — | Reference |
| XQT | Tire Front 8.00r19.5/e 10pr BL Radial TL | — | Reference |
| XQU | Tire Front 8.25r20.0/e 10pr BL Radial TT | — | Reference |
| XQX | Tire Front 8.25r20.0/f 12pr BL Radial TT this code has more than one documented meaning — filter by year | — | Reference |
| XR0 | P, EQUIPMENT, NONE SHIPMENT | 1999 | Provisional |
| XR1 | P, NPC, M, CONVERSION NAME PLT, "COMFORT" | 1998 | Provisional |
| XR2 | P, NPC, M, CONVERSION NAME PLT, "ELEGANCE" | 1998 | Provisional |
| XR4 | P, TPK, R, TRAILER PROVISIONS, (CHG TO V92) | 1997 | Provisional |
| XR5 | P, FLO, R, FILTER, POLLEN | 1995 | GM sourced |
| XR6 | P, VEHICLE, POSTAL VEH, UPFIT | 1998 | GM sourced |
| XR7 | P, CKD OPTION, TUNESIA (USE OPTION B01) | 1997 | Provisional |
| XR8 | P, EQUIPMENT, AUSTRALIA (CKD) | 1998 | Provisional |
| XR9 | P, EQUIPMENT, JAPAN (CKD) | 1998 | Provisional |
| XRA | P, FTR, M, TIRE FRONT, 215/85R16/E BW TL ALS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| XRB | P, FTR, M, TIRE FRONT, 9.00-20/G 14PR BW BIAS TT | 1998 | Provisional |
| XRD | P, FTR, M, TIRE FRONT, P215/70R16-99S BW PE/ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XRH | P, FTR, M, TIRE FRONT, 215/85R16/E BW TL (R187 TREAD), 229 | — | GM sourced |
| XRI | P, FTR, M, TIRE FRONT, 215/85R16/E BW TL HWY this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| XRL | P, FTR, M, TIRE FRONT, 235/80R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| XRM | Tire Front 255/70r22.5/g 14pr BL Radial TL | — | Reference |
| XRN | P, FTR, M, TIRE FRONT, 295/75R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| XRP | P, FTR, M, TIRE FRONT, 11.00R20/H 16PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| XRQ | Tire Front 8.00 X 16.5/c BL D/pe TL Hwy | — | Reference |
| XRR | P, FTR, M, TIRE FRONT, 11.00R20/G 14PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| XRS | Tire Front 8.00x16.5/d BL D/pe TL Hwy | — | Reference |
| XRU | Tire Front 8.75rx16.5lt/d BL R/pe ST TL Hwy | — | Reference |
| XRV | P, FTR, M, TIRE FRONT, 285/75R24.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| XS3 | P, EQC, R, EQUIPMENT ADDITIONAL, ADD & DELETE (EXPORT) ---SEE SPECIFIC COUNTRIES FOR PECULIAR OPTIONS | 1998 | Provisional |
| XS4 | P, KIT, AFTER MARKET HBD COUNTRY ROO BAR, 1205 E, 8, 8, A | — | Provisional |
| XS6 | P, VEHICLE, SERIES 3 UPGRADE, 510 E, 8, 8, A | — | Provisional |
| XS8 | P, KIT, AFTER MARKET HBD OPEN MOUTH SPORTS GRILLE, 1205 E, 8, 8, A | — | Provisional |
| XS9 | P, KIT, AFTER MARKET HBD REVISED LOWERED SUSPENSION, 1205 E, 8, 8, A | — | Provisional |
| XSA | P, FTR, M, TIRE FRONT, 245/50R18-100V BW TL AL3, 21009 this code has more than one documented meaning — filter by year | — | GM sourced |
| XSB | P, FTR, M, TIRE FRONT, 255/80R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| XSD | Tire Front 8.00-16.5lt/d BL D/ny (462572) | — | Reference |
| XSF | Tire Front 8.00-19.5/d BL D/ny TL Hwy (374446) | — | Reference |
| XSG | P, FTR, M, TIRE FRONT, 8.00-19.5/E BL D/NY TL HWY this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| XSH | P, FTR, M, TIRE FRONT, 275/80R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| XSJ | P, FTR, M, TIRE FRONT, 275/80R24.5/G 14PR BL TL RADIAL | 1987 | GM sourced |
| XSK | P, FTR, M, TIRE FRONT, 295/80R22.5/H 16PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| XSL | P, FTR, M, TIRE FRONT, 275/80R22.5/H 16PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| XSM | P, FTR, M, TIRE FRONT, 225/70R19.5/F BW R/ST TL ALS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| XSN | Tire Front 8.00-19.5/e BL D/pe TL Hwy (346981) | — | Reference |
| XSP | P, FTR, M, TIRE FRONT, 385/65R22.5/J 18PR BW TL RADIAL this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| XSR | Equipment Additional,sri Lanka - Mandatory | — | Reference |
| XSS | P, FTR, M, TIRE FRONT, P275/55R20-111S BW TL ST AL2, 20405 | — | GM sourced |
| XSX | Tire Front 8.25-20.0/f 12pr BL Bias TT | — | Reference |
| XT1 | P, LOCAL, EXPORT UPFIT VARIANT 1, 127 E, 8, 8, A | — | Provisional |
| XT2 | P, LOCAL, EXPORT UPFIT VARIANT 2, 127 E, 8, 8, A | — | Provisional |
| XT3 | P, LOCAL, EXPORT UPFIT VARIANT 3, 127 E, 8, 8, A | — | Provisional |
| XT4 | P, LOCAL, EXPORT UPFIT VARIANT 4, 127 E, 8, 8, A | — | Provisional |
| XT6 | P, KIT, AFTER MARKET 16X6 ALLOY WHL & TIRE NON ABS, STEEL SPARE, 10302 P, 8, 8, A | — | Provisional |
| XT7 | P, KIT, AFTER MARKET 16X6 ALLOY WHL & TIRE ABS STEEL SPARE, 10302 P, 8, 8, A | — | Provisional |
| XT8 | P, KIT, AFTER MARKET 16X7.5 "T" SER ALLOY WHEEL & TIRE, 10302 E, 8, 8, A | — | Provisional |
| XT9 | P, KIT, AFTER MARKET 17X8 "C" SER ALLOY WHEEL & TIRE, 10302 P, 8, 8, A | — | Provisional |
| XTB | P, FTR, M, TIRE FRONT, 255/70R22.5/H 16PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XTC | P, FTR, M, TIRE FRONT, 265/70R19.5/G 14PR BL TL RAD this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| XTH | Tire Front 8.75-16.5lt/e BL D/ny TL Hwy (3927095) | — | Reference |
| XTI | P, FTR, M, TIRE FRONT, 245/70R19.5/F 12PR BL TL RAD this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| XTN | P, FTR, M, TIRE FRONT, 225/70R19.5/F BW R/ST ST TL HWY this code has more than one documented meaning — filter by year | 1990 | GM sourced |
Using the master list
This is the full GM RPO code list we hold — every Regular Production Option code in the database, searchable by code or by description and filterable to a single model year. Most RPO lists on the internet run to a couple of hundred codes copied from one service manual. This one holds 24,366, and tells you where each meaning came from.
What an RPO code is
RPO stands for Regular Production Option. Every piece of factory equipment on a GM vehicle carries a three-character code, and the ones fitted to your truck are printed on the Service Parts Identification label in the glove box or on the door jamb. G80 is a locking differential, Z71 is an off-road suspension package, K05 is a block heater.
They matter because they are what the factory actually built, not what a listing claims. If you are buying a truck, the label settles the argument. If you are ordering parts, the axle and transmission codes decide which part fits.
Why the same code means different things
GM has reused these codes for decades and across every division. A code that means one thing on a 1978 pickup can mean something unrelated on a 2015 SUV, and plenty of entries in circulation come from bulk listings with no year and no document behind them.
So every entry here is labelled with where it came from. GM sourced means we hold an actual GM document for it. GM dated means it comes from the option master with a date attached. Reference means it is in general circulation with nothing dated behind it — still useful, but treat it as a lead rather than a fact. Filtering by your model year is the single best way to get an answer you can rely on.
Read the codes off your own label
If you have the sticker in front of you, the RPO decoder will read a photo of it and decode every code at once, checked against your model year.
FullSizeChevy.com is not affiliated with, endorsed by, or sponsored by General Motors. Chevrolet, GMC, Cadillac, Silverado, Sierra and related marks are trademarks of General Motors LLC and are used here only to identify applicable vehicles. RPO meanings vary by model year, platform and configuration — verify against your own label before buying parts.