← 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 1–100 of 643 codes beginning with W. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| W01 | P, SALES PACKAGE, COMFORT SEATING PACKAGE | 1998 | Provisional |
| W02 | P, SALES PACKAGE, OFFICE/FIVE PERSON SEATING PKG | 1994 | Provisional |
| W03 | Regal Limited Sedan Option | — | Reference |
| W05 | Regal Limited Coupe | — | Reference |
| W06 | Century Limited Wagon(merch Option)(4ah35 + W06 = 4al35) | — | Reference |
| W07 | Century Sport Coupe | — | Reference |
| W08 | Trim,custom | — | Reference |
| W09 | Century Limited Sedan(merchandising Option(4ah69 + W09 = 4al69) | — | Reference |
| W10 | MERCHANDISED PKG, PARK AVENUE MODEL | — | Provisional |
| W11 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 1, 10626 E 4, 4, A | — | GM sourced |
| W12 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 2, 10626 E 4, 4, A | — | GM sourced |
| W13 | Century Turbo Coupe | — | Reference |
| W14 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 4, 10626 E 4, 4, A | — | GM sourced |
| W15 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 5, 10626 E 4, 4, A | — | Provisional |
| W16 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 6, 10626 E 4, 4, A | — | GM sourced |
| W17 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 7, 10626 E 4, 4, A | — | Provisional |
| W18 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 8, 10626 E 4, 4, A | — | Provisional |
| W19 | P, NDD, R, NAVIGATION DISC DATA, NAV DATA 9, 10626 E 4, 4, A | — | Provisional |
| W1A | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO W/O PHONE | 1997 | Provisional |
| W1B | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO WITH PHONE | 1997 | Provisional |
| W1D | P, RDO, M, RADIO, SC804 | 1995 | Provisional |
| W1E | P, RDO, M, RADIO, SC202-D | 1997 | Provisional |
| W1G | P, PLAYER, COMPACT DISC CHANGER | 1998 | GM sourced |
| W1H | Sales Interior 'accent' Trim Package | — | Reference |
| W1I | P, IDT, M, TRIM, LEATHER, CAMPAIGN | 1999 | GM sourced |
| W1J | P, RDO, M, RADIO, SC303-D | 1997 | Provisional |
| W1K | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO WITH MULTI CD, W/O PHONE, 10130 E 0, 0, A | — | Provisional |
| W1L | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO W/O MULTI CD, W/O PHONE, 10130 E 0, 0, A | — | Provisional |
| W1M | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO WITH CD W/O DISPLAY W/O PHONE | 1997 | Provisional |
| W1N | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO WITH MULTI CD AND PHONE, 522 E 0, 0, A | — | Provisional |
| W1P | P, RDO, M, RADIO, PROVISIONS, MOUNTING, RADIO WITH PHONE W/O, MULTI CD, 522 E 0, 0, A | — | Provisional |
| W1Q | P, RDO, M, RADIO, - DELETE (CHG TO UL5) | 1998 | Provisional |
| W1R | P, EQUIPMENT, WIRING HARNESS, RADIO TELEMATIC FEATURES, SUBSTITUTE OPTION W/O PHONE | 1998 | Provisional |
| W1S | P, EQUIPMENT, WIRING HARNESS, RADIO FEATURE SUBSTITUTE OPTION WITH PHONE | 1998 | Provisional |
| W1T | P, NPC, M, CONVERSION NAME PLT, EMBLEM "SHADES OF SILVER" | 1998 | Provisional |
| W1U | P, NPC, M, CONVERSION NAME PLT, EMBLEM "DIAMOND" | 1998 | Provisional |
| W1W | P, RDO, M, RADIO, PROVISIONS, MOUNTING, TELEMATIC, WITH CD CHANGER | 1998 | Provisional |
| W1X | P, RDO, M, RADIO, PROVISIONS, MOUNTING, NAVIGATION, W/O MULTI CD, 522 E 0, 0, A | — | Provisional |
| W1Y | P, CONTROL, STEERING WHEEL, RADIO, REDUNDANT CONTROLS | 1997 | GM sourced |
| W1Z | P, RDO, M, RADIO, PROVISIONS, MOUNTING, NAVIGATION AND TELEMATIC | 1998 | Provisional |
| W20 | P, SGR, R, MERCHANDISED PKG, CADILLAC DEVILLE LIVERY | 1998 | GM sourced |
| W21 | Appearance Package Cadillac Platinum Edition this code has more than one documented meaning — filter by year | — | Reference |
| W22 | Sales Package International | — | Reference |
| W23 | P, SALES PACKAGE, BRITISH AUTOMOBILE ASSOCIATION, 20627 E 0 | — | Provisional |
| W24 | P, SGR, R, MERCHANDISED PKG, BUICK PARK AVENUE ULTRA, SPECIALTY VEHICLE, 10326 M 4, 4, A | — | GM sourced |
| W25 | P, SPP, R, PACKAGE, PONTIAC BANNER "BACK ROAD", 10302 E 3, 3, A this code has more than one documented meaning — filter by year | — | GM sourced |
| W26 | Merchandised Pkg Buick Uplevel'cxl' | — | Reference |
| W28 | Appearance Package LS Convertible this code has more than one documented meaning — filter by year | — | Reference |
| W29 | Appearance Package J4u Package - Pontiac Spring Special | — | Reference |
| W2A | P, ORNAMENTATION, NAME PLATE "OPEL" OR "VAUXHALL", RR - DELETE | 1998 | Provisional |
| W2B | P, NPC, M, CONVERSION NAME PLT, "GSI" | 1998 | Provisional |
| W2C | P, MSM, R, MODEL CONVERSION, 2000/TURBO | 1999 | Provisional |
| W2D | Vertical cargo net (LPO dealer-installed accessory) | 2026 | GM sourced |
| W2E | P, STS, M, SEAT, FRT BKT, RECARO | 1998 | GM sourced |
| W2F | P, WCV, R, COVER, WHEEL, FLUSH, VAR 5 | 1998 | GM sourced |
| W2G | P, BSM, R, MOLDING B/S, WITHOUT LETTERING | 1997 | GM sourced |
| W2H | P, ORNAMENTATION, NAME PLATE "CORSA" RR - DELETE | 1998 | Provisional |
| W2I | P, IDT, M, TRIM, CLOTH, NAMUR/MALTA, 413 E 0 | — | Provisional |
| W2J | P, ORNAMENTATION, NAME PLATE "ASTRA" RR - DELETE | 1998 | Provisional |
| W2K | P, ORNAMENTATION, NAME PLATE "OMEGA" RR, MV6/ELITE | 1998 | Provisional |
| W2L | P, ORNAMENTATION, NAME PLATE "VECTRA" RR - DELETE | 1998 | Provisional |
| W2M | P, ORNAMENTATION, NAME PLATE "OMEGA" RR - DELETE | 1998 | Provisional |
| W2N | P, NPC, M, CONVERSION NAME PLT, BODY SIDE - DELETE | 1998 | GM sourced |
| W2P | P, WCV, R, COVER, WHEEL, FLUSH, VAR 1, 331 E 0 | — | GM sourced |
| W2Q | P, WCV, R, COVER, WHEEL, FLUSH, VAR 2, 331 E 0 | — | GM sourced |
| W2R | P, NPC, M, CONVERSION NAME PLT, "MERIT" | 1998 | Provisional |
| W2S | P, MSM, R, MODEL CONVERSION, CAMPAIGN 95/1 | 1997 | Provisional |
| W2T | Equipment Antenna-taxi, W/o Gps | — | Reference |
| W2U | Equipment Antenna-taxi, W/gps | — | Reference |
| W2V | P, ORNAMENTATION, LETTERING, VAR - DELETE | 1998 | GM sourced |
| W2W | P, NPC, M, CONVERSION NAME PLT, "LS" | 1998 | Provisional |
| W2X | P, WCV, R, COVER, WHEEL, FLUSH, VAR 3 | 1998 | GM sourced |
| W2Y | P, WCV, R, COVER, WHEEL, FLUSH, VAR 4 | 1998 | GM sourced |
| W2Z | P, ORNAMENTATION, EMBLEM, "OPEL" REAR - DELETE | 1998 | Provisional |
| W30 | Equipment Stretch Livery | — | Reference |
| W31 | Ornamentation Extr, Nameplate, Rr, Left Side - Not Desired | — | Reference |
| W32 | Package-deluxe Sport | — | Reference |
| W33 | P, MSM, R, MODEL CONVERSION, OLDSMOBILE ALERO GLS | 1998 | GM sourced |
| W34 | Appearance Package Spring Special this code has more than one documented meaning — filter by year | — | Reference |
| W35 | Equipment Roof, Sign, Taxi, Version 1 | — | Reference |
| W36 | Appearance Package 'gt Look Alike' this code has more than one documented meaning — filter by year | — | Reference |
| W37 | Appearance Package Special Edition Toyota | — | Reference |
| W39 | Ornamentation Lettering, 'chevrolet' Delete | — | Reference |
| W3A | P, EVC, R, ENGINE PLANT, ASPERN, AUSTRIA | 1997 | Provisional |
| W3B | P, EVC, R, ENGINE PLANT, BOCHUM, GERMANY | 1997 | Provisional |
| W3C | P, NPC, M, CONVERSION NAME PLT, "CLASSIC" | 1998 | Provisional |
| W3D | P, EVC, R, ENGINE PLANT, TONAWANDA, USA | 1998 | Provisional |
| W3E | P, CND, R, CONVENIENCE PKG, CAMPAIGN 00/2 | 1999 | Provisional |
| W3F | P, WCV, R, COVER, WHEEL, FLUSH, VAR 7 | 1998 | GM sourced |
| W3G | P, NPC, M, CONVERSION NAME PLT, EMBLEM "VAR. 2" | 1998 | Provisional |
| W3H | P, CND, R, CONVENIENCE PKG, CAMPAIGN 00/3 | 1999 | Provisional |
| W3I | P, IDT, M, TRIM, CLOTH, HIGHWAY/MALTA, 413 E 0 | — | Provisional |
| W3J | P, NPC, M, CONVERSION NAME PLT, "CLUB" | 1998 | Provisional |
| W3K | P, ORNAMENTATION, NAME PLATE "ZAFIRA", RR - DELETE | 1998 | Provisional |
| W3L | P, NPC, M, CONVERSION NAME PLT, "EXECUTIVE" | 1999 | Provisional |
| W3M | P, NPC, M, CONVERSION NAME PLT, LETTERING "OPC" | 1999 | Provisional |
| W3R | P, FLP, R, FLEET SALES, BRITISH GAS | 1997 | Provisional |
| W3S | P, NPC, M, CONVERSION NAME PLT, EMBLEM "VAR. 3" | 1998 | Provisional |
| W3T | P, FLP, R, FLEET SALES, POST, 10118 E 0, 0, A | — | Provisional |
| W3U | P, MSM, R, MODEL CONVERSION, CLUB | 1997 | Provisional |
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.