← 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 301–400 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 |
|---|---|---|---|
| XID | Tire Front Lt195/75r14/c BL R/pe ST TL Als (15568334) | — | Reference |
| XIK | P, FTR, M TIRE FRONT, P245/70R16-106S BW PE/ST TL OOR this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XIN | Tire Frt-p205/70r15/ BL R/pe ST TL Al2 95s | — | Reference |
| XIT | Tire Front Lt265/75r16/e BW R/pe ST TL Oor (123/120r) | — | Reference |
| XJ0 | P, EQC, R EQUIPMENT ADDITIONAL, YUGOSLAVIA | 1997 | Provisional |
| XJ1 | P, CHASSIS, SPORT | 1997 | GM sourced |
| XJ2 | P, CHASSIS, SPORT, LOWERED | 1998 | GM sourced |
| XJ3 | P, CHASSIS, SPORT, LOWERED, MODIFIED, 21101 E 0 | — | GM sourced |
| XJ4 | P, MSM, R MODEL CONVERSION, GT/SR | 1997 | Provisional |
| XJ5 | P, EQC, R EQUIPMENT ADDITIONAL, SWEDEN | 1997 | GM sourced |
| XJ6 | P, EQC, R EQUIPMENT ADDITIONAL, JAPAN (DUP E12) this code has more than one documented meaning — filter by year | 1998 | Provisional |
| XJ7 | P, EQUIPMENT, LEVEL-1 | 1999 | Provisional |
| XJ8 | P, MSM, R MODEL CONVERSION, PREMIUM | 1998 | Provisional |
| XJ9 | P, EQC, R EQUIPMENT ADDITIONAL, HUNGARY (DUP XB2) | 1998 | Provisional |
| XJA | C, FTR, M TIRE FRONT, 225/700R480A 100W BW (PAX TIRE), 10621 | — | GM sourced |
| XJB | C, FTR, M TIRE FRONT, 225/70R17.5 BW R/ST TL OOR | 1995 | Provisional |
| XJD | P, FTR, M TIRE FRONT, 275/70R22.5 R TL LOW PROFILE, 118 E 8 | — | Provisional |
| XJE | Tire Front P245/50r18-99h BW ST TL Al3 | — | Reference |
| XJJ | P, FTR, M TIRE FRONT, 31X10.50R15LT/C BW R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| XJL | Tire Front P205/75r15/n Wol R/pe ST TL Oor (9591082) | — | Reference |
| XJM | P, FTR, M TIRE FRONT, P265/70R17-113S WOL R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XJP | P, FTR, M TIRE FRONT, P265/70R17-113S BW R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| XJT | Tire Front P205/75r15/n BL R/pe ST TL Oor (9590924) | — | Reference |
| XK0 | P, SALES PACKAGE, EQUIPMENT-SPORTY | 1997 | Provisional |
| XK1 | P, EQC, R EQUIPMENT ADDITIONAL, BELGIUM | 1997 | Provisional |
| XK2 | P, EQC, R EQUIPMENT ADDITIONAL, FRANCE | 1997 | GM sourced |
| XK3 | P, EQC, R EQUIPMENT ADDITIONAL, FINLAND | 1997 | Provisional |
| XK4 | P, EQC, R EQUIPMENT ADDITIONAL, ITALY | 1997 | GM sourced |
| XK5 | P, SALES PACKAGE, EQUIPMENT-JEWEL | 1997 | Provisional |
| XK6 | P, EQC, R EQUIPMENT ADDITIONAL, NORWAY | 1997 | Provisional |
| XK7 | P, SALES PACKAGE, EQUIPMENT-PRESTIGE | 1997 | Provisional |
| XK8 | P, EQC, R EQUIPMENT ADDITIONAL, TURKEY (DUP B11) | 1998 | Provisional |
| XKA | Chevrolet | — | Reference |
| XKB | Pontiac | — | Reference |
| XKC | P, FTR, M TIRE FRONT, P215/65R16-96S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XKG | P, FTR, M TIRE FRONT, P235/65R16-101S BW R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| XKI | Tire Front P235/65r16-101s Wol ST TL Al2 | — | Reference |
| XKK | P, FTR, M TIRE FRONT, 7.00RX16 8PR BW TT RADIAL HWY, 209 E 8 | — | Provisional |
| XKL | P, FTR, M TIRE FRONT, 7.50RX16 8PR BW TT RADIAL HWY, 209 E 8 | — | Provisional |
| XKM | P, FTR, M TIRE FRONT, 7.50RX16 12PR BW LT TT RADIAL HWY, 209 E 8 | — | Provisional |
| XKN | P, FTR, M, TIRE FRONT, P215/70R16-99S BW PE/ST TL AL2 this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XKQ | P, FTR, M, TIRE FRONT, 175RX14 8PR BW TT LT RADIAL HWY, 210 E, 8 | — | Provisional |
| XKR | P, FTR, M, TIRE FRONT, P245/45R18-96W BW R/PE ST TL AL3, 20510 | — | Provisional |
| XKS | P, FTR, M, TIRE FRONT, P235/50R17-95V BW R/PE ST TL AL3, 20305 | — | GM sourced |
| XKU | Tire Front P235/50r18-97h BW R/pe ST Al3 | — | Reference |
| XKZ | P, FTR, M, TIRE FRONT, 195/60R15-87V TL R/ST, 10201 E, 5 | — | Provisional |
| XL0 | P, SALES PACKAGE, EQUIPMENT-SELECTION | 1997 | Provisional |
| XL1 | P, EQC, R, EQUIPMENT ADDITIONAL, DENMARK | 1997 | Provisional |
| XL2 | P, EQC, R, EQUIPMENT ADDITIONAL, SWITZERLAND | 1997 | GM sourced |
| XL3 | P, CKD OPTION, TAIWAN | 1997 | Provisional |
| XL4 | Chassis Protection Kit, Engine Compartment | — | Reference |
| XL5 | P, EQC, R, EQUIPMENT ADDITIONAL, TAIWAN (DUP B04) | 1998 | Provisional |
| XL6 | Frequencies Rating 315 Mhz, Short Distance | — | Reference |
| XL7 | P, FQR, R, FREQUENCIES RATING, 315 MHZ, 10406 E, 0, 0, A | — | GM sourced |
| XL8 | P, FQR, R, FREQUENCIES RATING, 433 MHZ, 10406 E, 0, 0, A | — | GM sourced |
| XL9 | P, EQC, R, EQUIPMENT ADDITIONAL, ICELAND | 1997 | Provisional |
| XLB | P, FTR, M, TIRE FRONT, LT285/75R16/C BW ST TL OOR, 20429 | — | GM sourced |
| XLF | Tire Front 11.00-20.0/h 16pr BL Bias TT | — | Reference |
| XLH | P, FTR, M, TIRE FRONT, LT265/70R17/D BW ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XLI | Tire Front 225/75r15 BW TL Als Type 'c' | — | Reference |
| XLJ | P, FTR, M, TIRE FRONT, P235/60R17-100S BW R/PE ST TL AL2, 125 | — | GM sourced |
| XLK | P, FTR, M, TIRE FRONT, P235/60R17-103S WOL R/PE ST TL AL2, 125 | — | Provisional |
| XLL | P, FTR, M, TIRE FRONT, LT265/70R17/D WOL ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XLN | P, FTR, M, TIRE FRONT, 235/70R15-103H BW TL HWY this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| XLO | Tire Front P235/70r15 BW TL Oor | — | Reference |
| XLP | P, FTR, M, TIRE FRONT, LT245/75R16/E BW R/PE ST TL ALS 120/116S, 1218 | — | GM sourced |
| XLS | P, FTR, M, TIRE FRONT, LT245/75R16/E BW R/PE ST TL OOR 120/116S, 1218 | — | GM sourced |
| XLT | Tire Front P235/60r17-100s Wol ST TL Al2 | — | Reference |
| XM0 | P, MSM, R, MODEL CONVERSION, GLS | 1997 | Provisional |
| XM3 | P, SALES PACKAGE, 'THAI LIMITED EDITION', 10130 E, 0 | — | Provisional |
| XM4 | P, STS, M, SEAT, FRT BKT, W/LUMBAR SUPPORT, DRIVER & PASS SIDE | 1998 | Provisional |
| XM5 | P, MSM, R, MODEL CONVERSION, LEVEL 1 | 1999 | Provisional |
| XM6 | P, EQUIPMENT, STORAGE | 1997 | Provisional |
| XM7 | P, EQUIPMENT, STORAGE, ENHANCED | 1998 | Provisional |
| XM8 | P, EQUIPMENT, INTERIOR, OPTIC | 1998 | Provisional |
| XM9 | P, EQUIPMENT, EXTERIOR, OPTIC | 1998 | Provisional |
| XMB | Tire Front 10.00-22.5/e 10pr BL Bias TL | — | Reference |
| XMC | P, FTR, M, TIRE FRONT, P245/45R17-89Y BW R/PE ST TL HW4 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XMD | P, FTR, M, TIRE FRONT, P225/75R15/X BW R/PE ST TL OOR 105Q (X/LOAD), 224 | — | GM sourced |
| XME | Mexico,mandatory | — | Reference |
| XMJ | P, FTR, M, TIRE FRONT, P265/70R16-111S BW R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XMK | P, FTR, M, TIRE FRONT, P265/70R16-111S WOL R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XMO | P, FTR, M, TIRE FRONT, 235/75R15-105S BW R/PE ST TL AT, 224 | — | GM sourced |
| XMP | P, FTR, M, TIRE FRONT, LT245/75R16/E BW R/PE ST TL ALS 120R, 10612 | — | GM sourced |
| XMR | Tire Frt-p205/65r15/ N BL R/pe ST Al2 | — | Reference |
| XMT | Tire Front P235/55r16 BW R/pe ST TL Al2 96s | — | Reference |
| XMW | P, FTR, M, TIRE FRONT, P195/75R14/N BL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| XN2 | P, WCV, R, COVER, WHEEL, CENTER SILVER | 1998 | GM sourced |
| XN4 | P, SALES PACKAGE, ECO | 1999 | Provisional |
| XN5 | P, LAMP GROUP, (CHG TO TR9) | 1997 | GM sourced |
| XN8 | P, EQC, R, EQUIPMENT ADDITIONAL, GREAT BRITAIN | 1997 | Provisional |
| XNA | P, FTR, M, TIRE FRONT, 205/65R15-94H BW R/PE ST TL HWY | 1997 | GM sourced |
| XNC | P, FTR, M, TIRE FRONT, 245/70R19.5/H 16PR BL TL RAD, 10709 | — | GM sourced |
| XND | Tire Front P245/40zr18 BW Hw4 (emt) High-performance | — | Reference |
| XNF | P, FTR, M, TIRE FRONT, P235/75R16-106S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XNG | P, FTR, M, TIRE FRONT, P235/75R16-106S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XNI | P, FTR, M, TIRE FRONT, 225/60R16-98W BW R/PE ST TL HW4, 1130 | — | GM sourced |
| XNK | P, FTR, M, TIRE FRONT, P245/75R16-109S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XNL | P, FTR, M, TIRE FRONT, P245/75R16-109S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| XNM | P, FTR, M, TIRE FRONT, P245/70R17-108H BW TL ST ALS, 20405 | — | 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.