← 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 101–200 of 959 codes beginning with A. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| A3S | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 17, 11106 P 7 | — | Provisional |
| A3T | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 18, 11106 P 7 | — | Provisional |
| A3U | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 19, 11106 P 7 | — | Provisional |
| A3V | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 20, 11106 P 7 | — | Provisional |
| A3W | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 21, 11106 P 7 | — | Provisional |
| A3X | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 22, 11106 P 7 | — | Provisional |
| A3Y | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 23, 11106 P 7 | — | Provisional |
| A3Z | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 24, 11106 P 7 | — | Provisional |
| A40 | P, GOT, R, WINDOW TINTED, WINDSHIELD, ABSORBING GLAZING, REFLECTIVE | 1999 | GM sourced |
| A41 | P, WINDSHIELD, ABSORBING GLAZING, LESS SHADED UPPER BAND this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| A42 | P, ADJUSTER RR, RR SEAT BK | 1998 | GM sourced |
| A43 | P, MEMORY, SEAT ADJUSTER, MIRROR, POWER, DRIVER | 1991 | GM sourced |
| A44 | P, GOT, R, WINDOW TINTED, ALL, WINDSHIELD, ABSORBING GLAZING, REFLECTIVE this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| A45 | Memory settings | 2026 | GM sourced |
| A46 | P, SBR, R, ADJUSTER, SEAT EASY ENTRY, DRIVER & PASS | 1999 | Provisional |
| A47 | P, RESTRAINT SYSTEM RR, SEAT, DELUXE | 1992 | GM sourced |
| A48 | Window, power, rear sliding | 2026 | GM sourced |
| A49 | P, RESTRAINT SYSTEM RR, SEAT, SHLDR, RETR, 3 POINT | 1999 | Provisional |
| A4A | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 25, 11106 P 7 | — | Provisional |
| A4B | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 26, 11106 P 7 | — | GM sourced |
| A4C | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 27, 11106 P 7 | — | Provisional |
| A4D | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 28, 11106 P 7 | — | Provisional |
| A4E | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 29, 11106 P 7 | — | Provisional |
| A4F | 2015 Oem Engine Physical ID A4f & Production Number 12633003 this code has more than one documented meaning — filter by year | — | Reference |
| A4G | P, IDENTIFICATION, OVERRIDE OPT OF CANADIAN REQ'TS | 1998 | GM sourced |
| A4H | P, HLG, R, HANDLING CHARGE, SHIP THROUGH TO GROUND EFFECT, OSHAWA, CANADA | 1998 | Provisional |
| A4K | P, SALES PROCESSING OPT, #1 | 1998 | Provisional |
| A4L | P, SALES PROCESSING OPT, #2 | 1998 | Provisional |
| A4M | P, SALES PROCESSING OPT, #3 | 1998 | GM sourced |
| A4N | P, SALES PROCESSING OPT, #4 | 1998 | Provisional |
| A4P | P, SALES PROCESSING OPT, #5 | 1998 | Provisional |
| A4Q | P, SALES PROCESSING OPT, #6 | 1998 | Provisional |
| A4R | P, SALES PROCESSING OPT, #7 | 1998 | Provisional |
| A4S | P, SALES PROCESSING OPT, #8 | 1998 | Provisional |
| A4T | P, SALES PROCESSING OPT, #9 | 1998 | Provisional |
| A4U | P, SALES PROCESSING OPT, #10 | 1998 | Provisional |
| A4V | P, SALES PROCESSING OPT, #11 | 1998 | Provisional |
| A4W | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 31, 11106 P 7 | — | Provisional |
| A4X | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 32, 11106 P 7 | — | Provisional |
| A4Y | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 33, 11106 P 7 | — | Provisional |
| A4Z | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 34, 11106 P 7 | — | Provisional |
| A50 | Seats, front bucket | 2026 | GM sourced |
| A51 | P, STS, M, SEAT, FRT BKT, CUSTOM this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| A52 | P, STS, M, SEAT, FRT BENCH this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| A53 | P, APM, R, ADJUSTER PASS ST, MANUAL, 6 WAY | 1998 | GM sourced |
| A54 | P, WINDOW, POWER OPERATED, RR RH PASSENGER, 21011 E 4 | — | GM sourced |
| A55 | P, WINDOW, POWER OPERATED, DRIVER, 21011 E 4 | — | GM sourced |
| A56 | P, MEMORY, SEAT ADJUSTER, RADIO, POWER, 21004 | — | Provisional |
| A57 | P, PAS, R, SEAT PASSENGER, AUXILIARY, ONE, FLDG this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| A58 | P, PAS, R, SEAT PASSENGER, AUXILIARY, TWO this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| A59 | P, LOCK CONTROL, RR COMPT LID, REM CONT, MANUAL RELEASE this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| A5A | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 35, 11106 P 7 | — | GM sourced |
| A5B | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 36, 11106 P 7 | — | Provisional |
| A5C | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 37, 11106 P 7 | — | Provisional |
| A5D | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 38, 11106 P 7 | — | Provisional |
| A5E | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 39, 11106 P 7 | — | Provisional |
| A5F | P, FLEET SALES (CANADA), CANADIAN PROCESSING CODE 40, 11106 P 7 | — | Provisional |
| A5G | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 60 | 1998 | Provisional |
| A5H | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 61 | 1998 | Provisional |
| A5J | P, IDENTIFICATION, ACCOUNTING OPT CANADIAN ACCOUNTING PURPOSES | 1998 | Provisional |
| A5K | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 62 | 1998 | Provisional |
| A5L | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 63 | 1998 | Provisional |
| A5M | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 64 | 1998 | Provisional |
| A5N | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 65 | 1998 | Provisional |
| A5P | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 66 | 1998 | Provisional |
| A5Q | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 67 | 1998 | Provisional |
| A5R | P, SALES PROCESSING OPT, #29 | 1985 | GM sourced |
| A5S | P, SALES PROCESSING OPT, #30 | 1985 | Provisional |
| A5T | P, SALES PROCESSING OPT, #31 | 1998 | Provisional |
| A5U | P, SALES PROCESSING OPT, #32 | 1998 | Provisional |
| A5V | P, SALES PROCESSING OPT, #33 | 1998 | Provisional |
| A5W | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 68 | 1998 | Provisional |
| A5X | P, SALES PROCESSING OPT, #35 | 1985 | Provisional |
| A5Y | P, SALES PROCESSING OPT, CANADIAN PROCESSING CODE 69 | 1998 | Provisional |
| A60 | Tailgate, locking | 2026 | GM sourced |
| A62 | P, RES, M, RESTRAINT SYSTEM, SEAT - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| A63 | P, RES, M, RESTRAINT SYSTEM, SEAT, PASS - DELETE | 1998 | GM sourced |
| A64 | Seat RR Split, Folding, 40/60 | — | Reference |
| A65 | Seat,front Bench,split Back,center Arm Rest,3-passenger | — | Reference |
| A66 | P, STS, M, SEAT, FRT SPLIT, 2 PASS, 6 WAY ADJ, RECL this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| A68 | Seat, rear 60/40 folding bench | 2026 | GM sourced |
| A69 | Restraint,seat Belt Tensioner,frt,var. 2 | — | Reference |
| A6A | 2010 Oem Engine Physical ID A6a & Production Number 12635496 this code has more than one documented meaning — filter by year | — | Reference |
| A6B | 2010 Oem Engine Physical ID A6b & Production Number 12635497 this code has more than one documented meaning — filter by year | — | Reference |
| A6C | 2010 Oem Engine Physical ID A6c & Production Number 12635498 this code has more than one documented meaning — filter by year | — | Reference |
| A6D | 2010 Oem Engine Physical ID A6d & Production Number 12635499 this code has more than one documented meaning — filter by year | — | Reference |
| A6E | Seat RR Fixed Seat Back, W/ Armrest, Pass Through | — | Reference |
| A6F | 2010 Oem Engine Physical ID A6f & Production Number 12635500 this code has more than one documented meaning — filter by year | — | Reference |
| A6G | Adjuster FRT ST Power, 6 Way Vert / Recline, Manual Horizontal, Drive | — | Reference |
| A6Q | Windows, manual | 2022 | Provisional |
| A70 | P, RESTRAINT, SEAT BELT TENSIONER, FRT, 508 E, 0 | — | GM sourced |
| A71 | P, RESTRAINT, SEAT BELT TENSIONER, RR, 508 E, 0 | — | Provisional |
| A72 | Window Tinted Deep, RR S/d, Qtr Pnl | — | Reference |
| A73 | P, GOT, R, WINDOW TINTED, DEEP, RR S/D DOORS, QTR PNL, RR END | 1999 | GM sourced |
| A74 | P, LCR, R, LOCK CONTROL RR CMPT, LID, I/P SWITCH, REM CONT ELEC OPEN/CLOSE, 10501 E, 4 | — | Provisional |
| A75 | P, SEAT CUSHION, BACK FRT, HD | 1990 | GM sourced |
| A76 | P, SEAT CUSHION, BACK RR, HD | 1990 | GM sourced |
| A77 | Seat RR Split, Folding, 60/40 | — | Reference |
| A78 | P, AFS, R, ADJUSTER FRT ST BK, MANUAL, DRIVER & PASS, RECLINING this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| A79 | P, AFS, R, ADJUSTER FRT ST BK, MANUAL, DRIVER, RECLINING 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.