← 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 801–900 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 |
|---|---|---|---|
| ATZ | Seat delete, second row this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| AU0 | P, LCE, R, LOCK CONTROL, ENTRY, REMOTE ENTRY this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| AU1 | P, LOCK CONTROL, SIDE DR, FUEL FILLER DR, ELEC | 1991 | GM sourced |
| AU2 | P, LOCK CONTROL, CARGO DR this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| AU3 | Door locks, power this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| AU4 | P, LOCK CONTROL, SIDE DR, ELEC, AUTOMATIC this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| AU5 | P, LCE, R, LOCK CONTROL, ENTRY, REMOTE ENTRY, LOW POWER | 1997 | GM sourced |
| AU6 | P, LOCK CONTROL, END GATE WINDOW, REM CONT ELEC RELEASE this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| AU7 | Fleet Common Key - Included and only available with SEO (6E2) or (6E8) Fleet Calibration this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| AU8 | P, LCE, R, LOCK CONTROL, ENTRY, REMOTE ENTRY, SPECIFIC FREQUENCY | 1997 | GM sourced |
| AU9 | P, LOCK CONTROL, RR COMPT LID, KEYLESS OPERATING FACILITY | 1991 | GM sourced |
| AUA | Identification Breaking Point M.y. 2011 Step 1 | — | Reference |
| AUD | Identification Coupe Changes With Sop Convertible | — | Reference |
| AUH | Identification Breaking Point M.y. 2012 Step 1 | — | Reference |
| AUI | Identification Breaking Point M.y. 2013 Step 1 | — | Reference |
| AUK | Window Tinted Deep, RR S/d Wdo, RR Wdo | — | Reference |
| AUL | Lock Control, Entry Remote Entry & L/gate Glass Opening(2009 Final Yr) | — | Reference |
| AUM | Family Code, Mirror Aux | 1994 | GM dated |
| AUN | Memory settings | 2026 | GM sourced |
| AUQ | Identification Effective Point Control, 2013 1/2 M.y. | — | Reference |
| AUS | P, IDENTIFICATION, HOLDEN VT COMMON PART REQUIREMENTS this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| AUW | Seat,passenger,air,low Back,vinyl Bostrom 710e | — | Reference |
| AUZ | Identification Breaking Point M.y. 2012 Step 2 | — | Reference |
| AV0 | P, STS, M, SEAT, FRT BKT, DRIVER, RECL, 8 WAY ADJUSTER, POWER | 1997 | GM sourced |
| AV1 | P, PAS, R, SEAT PASSENGER, FRT BKT, PASS, RECL, 8 WAY ADJUSTER, POWER | 1997 | GM sourced |
| AV2 | P, STS, M, SEAT, FRT BKT, DRIVER, RECL, 8 WAY ADJUSTER, MEMORY, POWER | 1998 | GM sourced |
| AV3 | P, LOCK CONTROL, SUN ROOF, ELECTRIC, REMOTE CLOSING | 1999 | GM sourced |
| AV4 | P, SEAT RR, SPLIT BACK, FOLDING, ADJUSTABLE, 221 E, 5 | — | GM sourced |
| AV5 | P, STS, M, SEAT, FRT BKT, HIGH BACK this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| AV6 | Seat RR Bucket, Less Trim this code has more than one documented meaning — filter by year | — | Reference |
| AV7 | P, RESTRAINT, CARGO, MOVABLE | 1998 | Provisional |
| AV8 | P, SEAT CENTER, FRT BKT, AUXILIARY, FOLDING this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| AV9 | P, NET, CARGO, MOVABLE, 20109 E, 0 | — | GM sourced |
| AVC | Family Code, Avec System | 1999 | GM dated |
| AVF | Identification Effective Point Control, 2015 1/2 M.y. | — | Reference |
| AVI | Seat Belt Adjustable Guide Loops | 2026 | GM sourced |
| AVJ | Keyless Open and Start | 2026 | GM sourced |
| AVK | Seat adjuster, driver 4-way power lumbar | 2026 | GM sourced |
| AVN | Restraint Head, RR Seat | — | Reference |
| AVS | Seat,passenger Air,low Back,vinyl,bostrom 910 | — | Reference |
| AVT | Seat,passenger Air,high Back,vinyl,bostrom 910 | — | Reference |
| AVU | Seat adjuster, front passenger 4-way power | 2026 | GM sourced |
| AVY | Restraint System RR Seat, LH & Rh/elr, Load Limiter & Ctr/3 Point | — | Reference |
| AW0 | P, SEAT BACK, FOLDING, PASSENGER, LEFT SIDE | 1999 | Provisional |
| AW1 | P, PAS, R, SEAT PASSENGER, BENCH | 1997 | Provisional |
| AW2 | P, SEAT RR, 2 PASSENGER, 502 E, 8 | — | GM sourced |
| AW3 | P, LCE, R, LOCK CONTROL, ENTRY, REMOTE ENTRY - NOT INSTALLED, 511 E, 1 | — | GM sourced |
| AW4 | Restraint Head, Expanded Polypropylene | — | Reference |
| AW5 | P, SEAT RR, BKT, W/CTR AUXILIARY SEAT/CONSOLE, 225 E, 0 | — | GM sourced |
| AW6 | P, RES, M, RESTRAINT SYSTEM, SEAT, INFLATABLE, DRIVER & PASS FRT, INFLATABLE DRIVER SIDE | 1998 | GM sourced |
| AW7 | P, RES, M, RESTRAINT SYSTEM, SEAT, INFLATABLE, DRIVER & PASS, FRT, FRT SIDE & RR SIDE, ROOF SIDE, 20129 E, 5 | — | GM sourced |
| AW8 | P, RESTRAINT, HEAD, FRT SEAT, VINYL COVERED, OPEN STYLE | 1997 | Provisional |
| AW9 | P, RES, M, RESTRAINT SYSTEM, SEAT, INFLATABLE, DRIVER & PASS, FRT, FRT SIDE & RR SIDE | 1998 | GM sourced |
| AWA | Restraint,frt Seat,driver,wlr this code has more than one documented meaning — filter by year | — | Reference |
| AWB | Restraint System,rr Seat,lh & Rh,elr & Ctr,2 Point this code has more than one documented meaning — filter by year | — | Reference |
| AWC | P, LOCK CONTROL, WINDOW, ELECTRIC, REMOTE CLOSING, 20124 E, 5 | — | Provisional |
| AWD | Seat,passenger,high Back,vinyl,bostrom 710e | — | Reference |
| AWE | C, EQUIPMENT, CLOTH INSERT, PASS SEAT this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| AWF | P, NET, CONVENIENCE, FRT COMPT, FLOOR, PASS SI, 20208 E, 0 | — | GM sourced |
| AWG | Restraint System RR Seat, Otr 3 Point Elr, W/o Clr | — | Reference |
| AWH | P, RES, M, RESTRAINT SYSTEM, SEAT, INFLATABLE, DRIVER & PASS FRT & ROOF SIDE, INFLATABLE DRIVER SIDE, 10515 | — | Provisional |
| AWJ | C, PANEL, TRIM, FRT DOORS (SEO) this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| AWK | Covering Color Passenger Seat - Black | — | Reference |
| AWL | Belt,front,l/r,wlr this code has more than one documented meaning — filter by year | — | Reference |
| AWM | P, COVERING, COLOR, PASS SEAT, INTERIOR TRIM, 20604 | — | GM sourced |
| AWN | Restraint System RR Seat Belt, Rear, 3 Point, Outer | — | Reference |
| AWO | Restraint System RR Seat Belt, Rear, 3 Point, Ctr | — | Reference |
| AWP | Restraint FRT Seat, Driv, Pass, Wlr this code has more than one documented meaning — filter by year | — | Reference |
| AWQ | Restraint System RR Seat Belt, Rear, 3 Point, Ctr - None this code has more than one documented meaning — filter by year | — | Reference |
| AWR | P, SENSOR INDICATOR, INFLATABLE RESTRAINT, FRT RAIL, DRIVER/PASSENGER PRESSENCE DETECTOR, 21106 | — | Provisional |
| AWS | Restraint Seat Belt Tensioner, Driver this code has more than one documented meaning — filter by year | — | Reference |
| AWT | Restraint Seat Belt Tensioner, Driver this code has more than one documented meaning — filter by year | — | Reference |
| AWU | Restraint FRT Seat,3 Point,elr,hybrid | — | Reference |
| AWW | Net Convenience, RR Compt, Floor | — | Reference |
| AWX | Restraint System Seat, Inflatable, Driver & Pass, Frt, Roof Side | — | Reference |
| AWY | Restraint System RR Seat,shldr,retr,st Belt Anchorage Point Detachable | — | Reference |
| AX0 | P, PAR, R, PARTITION, TUBULAR FRAME, DRIVER | 1999 | GM sourced |
| AX1 | P, PAR, R, PARTITION, MESH TYPE, W/WINDOW | 1998 | Provisional |
| AX2 | P, SPK, M, KEY, COMMON, VEHICULAR UNIQUE this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| AX3 | P, LCE, R, LOCK CONTROL, ENTRY, REMOTE ENTRY - DEALER ACTIVATED, 11010 | — | GM sourced |
| AX4 | P, RESTRAINT CONVERSION, SEAT, MAN, EUROPEAN this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| AX5 | P, PAR, R, PARTITION, MESH, DRIVER | 1998 | GM sourced |
| AX6 | P, PAR, R, PARTITION, SOLID TYPE | 1998 | Provisional |
| AX7 | P, PAR, R, PARTITION, EXPANDED METAL, W/CTR SLIDING DOOR | 1997 | GM sourced |
| AX8 | P, PAR, R, PARTITION, MESH, DRIVER & PASS | 1998 | GM sourced |
| AX9 | P, PAR, R, PARTITION, SOLID TYPE, W/WINDOW | 1998 | GM sourced |
| AXC | Window Pwr-express Up/down-drvr/pass, RR Disable | — | Reference |
| AXE | Window Pwr Operated-express Up/down Drvr, Exp Down Pass Rear Disable | — | Reference |
| AXG | Window, power | 2026 | GM sourced |
| AXI | Window Power Operated, Rear Express Down | — | Reference |
| AXJ | Vehicle Type Passenger Car | — | Reference |
| AXK | Vehicle Type Truck | — | Reference |
| AXM | VIN Ident Export Special, Modified Composition | — | Reference |
| AXN | Identification 9.5' Light Duty Beam this code has more than one documented meaning — filter by year | — | Reference |
| AXP | P, VIN IDENT, POSITION, MULTI-PURPOSE VEHICLE this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| AXQ | P, VIN IDENT, POSITION, BUS this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| AXR | C, VIN IDENT, EXPORT SPECIAL this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| AXS | VIN Ident Panel Van | — | Reference |
| AXV | P, GBS, R, WINDOW SIDE BODY, SLIDING | 1998 | Provisional |
| AXW | Vehicle Type Bus- (not School Bus) | — | 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.