← 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 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 |
|---|---|---|---|
| AE6 | P, LCE, R, LOCK CONTROL, ENTRY, REMOTE ENTRY, SPECIFIC FREQUENCY, START, 11024 E, 4 | — | Provisional |
| AE7 | Seats, front 40/20/40 split-bench this code has more than one documented meaning — filter by year | 2022 | GM sourced |
| AE8 | P, AFT, R, ADJUSTER FRT ST, POWER, 8 WAY, 20806 E, 4 | — | GM sourced |
| AE9 | P, AFS, R, ADJUSTER FRT ST BK, FRT BKT, LOW BACK, DRIVE, TORSION BAR SUSP this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| AEB | Adjuster, Seat Easy Entry RH | — | Reference |
| AEC | Window Power Operated, Driver Express Down | — | Reference |
| AED | Window, power front | 2026 | GM sourced |
| AEF | Window, power | 2026 | GM sourced |
| AEH | Interior Trim Config #28 | — | Reference |
| AEJ | Interior Trim Config #29 | — | Reference |
| AEK | Seat Passenger Air, High Back | — | Reference |
| AEL | Seat Driver, Air, High Back | — | Reference |
| AEN | Interior Trim Config #35 | — | Reference |
| AEP | Interior Trim Config #36 | — | Reference |
| AEQ | Windows, power | 2026 | GM sourced |
| AER | Window Power Operated, RR Drs, Express Up/down | — | Reference |
| AES | Interior Trim Config #37 | — | Reference |
| AET | Interior Trim Config #38 | — | Reference |
| AEV | Interior Trim Config #39 | — | Reference |
| AEW | Interior Trim Config #40 | — | Reference |
| AEX | Interior Trim Config #41 | — | Reference |
| AEY | Interior Trim Config #42 | — | Reference |
| AEZ | Interior Trim Config #43 | — | Reference |
| AF0 | Adjuster,seat,easy Entry,driver | — | Reference |
| AF1 | Adjuster,seat,4-way Manual,passenger this code has more than one documented meaning — filter by year | — | Reference |
| AF2 | P, SBR, R, ADJUSTER, SEAT, POWER, 2 WAY, VERT, DRIVER | 1992 | GM sourced |
| AF3 | P, SBR, R, ADJUSTER, SEAT, POWER, 2 WAY, VERT, PASS | 1998 | GM sourced |
| AF4 | 2015 Oem Engine Physical ID Af4 & Production Number 12633003 | — | Reference |
| AF5 | P, SBR, R, ADJUSTER, SEAT EASY ENTRY, PASS this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| AF6 | Seat, driver power massage | 2026 | GM sourced |
| AF7 | Doors, front and rear this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| AF8 | P, LOCK CONTROL, SIDE DOOR, ANTI THEFT PROTECTION, 20122 E, 0 | — | GM sourced |
| AF9 | Seat,front Bucket,driver,passenger,reclining(high Performance) | — | Reference |
| AFA | Interior Trim Config #1 | — | Reference |
| AFB | Interior Trim Config #2 | — | Reference |
| AFC | Interior Trim Config #3 | — | Reference |
| AFD | Interior Trim Config #4 | — | Reference |
| AFE | Interior Trim Config #5 | — | Reference |
| AFF | Interior Trim Config #6 | — | Reference |
| AFG | Interior Trim Config #7 | — | Reference |
| AFH | Interior Trim Config #8 | — | Reference |
| AFI | Interior Trim Config #9 | — | Reference |
| AFJ | Interior Trim Config #10 | — | Reference |
| AFK | Interior Trim Config #11 | — | Reference |
| AFL | Interior Trim Config #12 | — | Reference |
| AFM | Interior Trim Config #13 | — | Reference |
| AFN | Interior Trim Config #14 | — | Reference |
| AFO | Interior Trim Config #15 | — | Reference |
| AFP | Interior Trim Config #44 | — | Reference |
| AFQ | Interior Trim Config #45 | — | Reference |
| AFR | Interior Trim Config #46 | — | Reference |
| AFS | Family Code, Adjuster FRT ST BK | 1990 | GM dated |
| AFT | Family Code, Adjuster FRT ST | 1990 | GM dated |
| AFV | Interior Trim Config #47 | — | Reference |
| AFW | Interior Trim Config #48 | — | Reference |
| AFX | Interior Trim Config #49 | — | Reference |
| AFY | Interior Trim Config #50 | — | Reference |
| AFZ | Restraint Provisions Child, Front Seat Rail, Front End, Pass Side | — | Reference |
| AG0 | P, AFT, R, ADJUSTER FRT ST, POWER, 8 WAY, 2 POSITION MEMORY, DRIVER this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| AG1 | P, AFT, R, ADJUSTER FRT ST, POWER, MULTI-DIRECTIONAL, DRIVER this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| AG2 | Seat adjuster, front passenger 6-way power this code has more than one documented meaning — filter by year | 2019 | Reference |
| AG3 | P, AFT, R, ADJUSTER FRT ST, POWER, 8 WAY, 5 POSITION MEMORY, DRIVER, 608 E, 8 this code has more than one documented meaning — filter by year | — | GM sourced |
| AG4 | P, AFT, R, ADJUSTER FRT ST, MANUAL, 2 WAY, VERT, DRIVER | 1994 | GM sourced |
| AG5 | P, APM, R, ADJUSTER PASS ST, MANUAL, 2 WAY this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| AG6 | P, APM, R, ADJUSTER PASS ST, MANUAL, 4 WAY, 204 E, 0 this code has more than one documented meaning — filter by year | — | GM sourced |
| AG7 | P, AFT, R, ADJUSTER FRT ST, POWER, 8 WAY, 2 POSITION MEMORY | 1998 | GM sourced |
| AG8 | P, AFT, R, ADJUSTER FRT ST, POWER, 8 WAY, 8 POSITION MEMORY, MIRROR this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| AG9 | P, AFT, R, ADJUSTER FRT ST, POWER, 6 WAY | 1998 | GM sourced |
| AGL | Family Code, Angle | 1988 | GM dated |
| AGO | Interior Trim Config #54 | — | Reference |
| AH0 | P, WINDOW, FIXED, SLIDING FRT DR, LH, 1023 E, 0 | — | Provisional |
| AH1 | P, WINDOW, FIXED, SLIDING FRT DR, RH, 1023 E, 0 | — | Provisional |
| AH2 | P, WINDSHIELD, TOUGHENED SAFETY ZONE this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| AH3 | P, AFT, R, ADJUSTER FRT ST, MANUAL, 4 WAY, DRIVER | 1992 | GM sourced |
| AH4 | P, AFT, R, ADJUSTER FRT ST, MANUAL, 6 WAY, DRIVER | 1998 | GM sourced |
| AH5 | P, AFT, R, ADJUSTER FRT ST, POWER, 8 WAY, NO MEMORY, DRIVER, 614 E, 8 | — | GM sourced |
| AH6 | P, SBR, R, ADJUSTER, SEAT, POWER, 4 WAY, VERT, DRIVER | 1998 | GM sourced |
| AH7 | P, APM, R, ADJUSTER PASS ST, POWER, 4 WAY, VERT | 1998 | GM sourced |
| AH8 | P, APM, R, ADJUSTER PASS ST, POWER, 8 WAY | 1997 | GM sourced |
| AH9 | P, AFT, R, ADJUSTER FRT ST, MANUAL, 2 WAY, DRIVER | 1998 | GM sourced |
| AHA | P, CONTROL, SEAT, MANUAL LUMBAR, LH, 712 E, 0 | — | GM sourced |
| AHB | P, CONTROL, SEAT, MANUAL LUMBAR, RH, 712 E, 0 | — | Provisional |
| AHC | P, CONTROL, SEAT, MANUAL CUSHION EXTN, DRIVER | 1998 | GM sourced |
| AHD | P, CONTROL, SEAT, POWER CUSHION EXTN, DRIVER | 1998 | GM sourced |
| AHE | Seat, driver 2-way power | 2026 | GM sourced |
| AHF | P, CONTROL, SEAT, MANUAL CUSHION EXTN, PASS | 1998 | GM sourced |
| AHG | P, CONTROL, SEAT, POWER CUSHION EXTN, PASS | 1998 | GM sourced |
| AHH | Seat, front passenger 2-way power | 2026 | GM sourced |
| AHJ | P, CONTROL, SEAT, MANUAL BOLSTER, DRIVER | 1998 | Provisional |
| AHK | Control Seat, Rear, Power Lumbar, Massage | — | Reference |
| AHL | P, RESTRAINT, HEAD, POWER, PASS | 1998 | Provisional |
| AHM | P, RESTRAINT, HEAD, POWER, DRIVER | 1998 | Provisional |
| AHN | Restraint Provisions Latch | — | Reference |
| AHO | Interior Trim Config #58 | — | Reference |
| AHP | P, RESTRAINT, HEAD, FRT SEAT, PWR UP/DOWN WITH HEIGHT DETECTION | 1999 | Provisional |
| AHQ | Adjuster FRT ST Power, 6 Way, Vert, Pwr Lumbar, Driver | — | Reference |
| AHR | P, RESTRAINT, HEAD, FRT SEAT, UP/DOWN, FORE/AFT ADJUSTMENT, 20621 | — | GM sourced |
| AHS | Restraint Head, FRT Seat, Up/down, Fore/aft Adjustment Active | — | Reference |
| AHT | P, AFT, R, ADJUSTER FRT ST, POWER, MULTI-DIRECTIONAL/FUNCTIONAL, DRIVER, 10927 E, 0 | — | Provisional |
| AHU | Restraint Provisions Belts, Adjuster, Height, FRT | — | Reference |
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.