← 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 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 |
|---|---|---|---|
| WA5 | P, SGR, R, MERCHANDISED PKG, BONNEVILLE SLE | 1999 | GM sourced |
| WA6 | P, SGR, R, MERCHANDISED PKG, PONTIAC SSEI | 1998 | GM sourced |
| WA7 | P, SALES PACKAGE, COMFORT/CONVENIENCE | 1996 | Provisional |
| WA8 | P, SALES PACKAGE, SAFETY/SECURITY | 1996 | Provisional |
| WA9 | P, SALES PACKAGE, LEATHER/LUMBAR | 1996 | Provisional |
| WAA | P, IDT, M, TRIM, CLOTH, GRAND LUXE | 1999 | Provisional |
| WAB | P, ORNAMENTATION, NAME PLATE "COMBO", 20214 E 0 | — | Provisional |
| WAC | P, PSA ALLOWANCE | 1998 | GM sourced |
| WAD | P, ORNAMENTATION, NAME PLATE "OMEGA", 20214 E 0 | — | Provisional |
| WAE | P, ORNAMENTATION, NAME PLATE "CORSA", 20215 E 0 | — | Provisional |
| WAF | P, ORNAMENTATION, NAME PLATE "ZAFIRA", 20215 E 0 | — | Provisional |
| WAG | P, ORNAMENTATION, NAME PLATE "MERIVA", 20215 E 0 | — | Provisional |
| WAH | P, ORNAMENTATION, NAME PLATE "SIGNUM", 20408 E 0 | — | Provisional |
| WAI | P, NPC, M, CONVERSION NAME PLT, "LT", 21101 E 8 | — | Provisional |
| WAJ | P, ORNAMENTATION, LETTERING "N'JOY" LATERAL, ABOVE, 20408 E 0 | — | Provisional |
| WAK | Hook,coat | — | Reference |
| WAL | Ornamentation Name Plate 'aveo' | — | Reference |
| WAM | Ornamentation Nameplate, 'matiz' | — | Reference |
| WAN | Ornamentation Name Plate 'aveo 5' | — | Reference |
| WAO | Ornamentation,name Plate 'wave' | — | Reference |
| WAP | Ornamentation,name Plate 'swift +' | — | Reference |
| WAQ | Ornamentation,name Plate 'kalos' | — | Reference |
| WAR | Family Code, Warranty | 1989 | GM dated |
| WAS | Ornamentation Nameplate, 'spark' | — | Reference |
| WAT | Ornamentation,name Plate 'kalos V' | — | Reference |
| WAU | Ornamentation,lettering 'romance' | — | Reference |
| WAV | Ornamentation,name Plate 'lacetti' | — | Reference |
| WAW | Ornamentation,name Plate 'nubira' | — | Reference |
| WAX | Ornamentation,name Plate 'optra' | — | Reference |
| WAY | Ornamentation,name Plate 'forenza' | — | Reference |
| WAZ | 2010 Oem Engine Physical ID Waz & Production Number 12617537 this code has more than one documented meaning — filter by year | — | Reference |
| WB1 | P, SALES PACKAGE, LESABRE STYLING PACKAGE, 21005 M 4 4, A | — | Provisional |
| WB2 | P, IDENTIFICATION, WHEEL, 2 PC PROCESS | 1993 | Provisional |
| WB3 | P, SALES PACKAGE, SPRING MARKETING VEHICLE, 21024 E 4 4, A | — | GM sourced |
| WB4 | P, ORNAMENTATION, WOODGRAIN APPLIQUE - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| WB5 | Model Conversion Turbo X | — | Reference |
| WB6 | P, OWM, R, OWNERS MANUAL, ENGLISH & CHINESE LANGUAGE, 830 E 8 | — | Provisional |
| WB7 | Merchandised Pkg Lucerne Csx | — | Reference |
| WB9 | P, SGR, R, MERCHANDISED PKG, DESIGNER PACKAGE, 10917 | — | GM sourced |
| WBA | P, ORNAMENTATION, NAME PLATE "OPC" RR, 11119 E 0 | — | Provisional |
| WBB | P, IDT, M, TRIM, CLOTH, GRAND LUXE SUPER | 1999 | Provisional |
| WBC | Cat-Back Performance Exhaust (LPO dealer-installed accessory) | 2026 | GM sourced |
| WBD | 2010 Oem Engine Physical ID Wbd & Production Number 12615874 | — | Reference |
| WBE | P, EQUIPMENT, RECEIVING UNIT, RADIO, 10829 E 0 | — | Provisional |
| WBF | P, EQUIPMENT, RECEIVING UNIT, PHONE, 10829 E 0 | — | Provisional |
| WBG | P, EQUIPMENT, RECEIVING UNIT, GPS, 10829 E 0 | — | Provisional |
| WBH | P, SGR, R, MERCHANDISED PKG, BASE DECOR, 11106 | — | GM sourced |
| WBI | Spring FRT & Rr, Std | — | Reference |
| WBJ | P, IDENTIFICATION, EFFECTIVE POINT CONTROL - COOLING SYSTEM, GASOLINEENGINES, 20208 E 0 | — | Provisional |
| WBK | P, EQUIPMENT, PUBX - DELETE, 21024 E 8 | — | Provisional |
| WBL | Z71 Chrome Sport Edition | 2026 | GM sourced |
| WBM | P, EQUIPMENT, PREMIUM AUDIO, 10202 | — | GM sourced |
| WBN | P, PSA ALLOWANCE, WHEEL BASE MODIFIER | 1998 | GM sourced |
| WBO | Ornamentation,name Plate 'evanda' | — | Reference |
| WBP | Graphite Edition | 2026 | GM sourced |
| WBQ | P, EQUIPMENT, ADDITIONAL MICROPHONE, 10829 E 0 | — | Provisional |
| WBR | Ornamentation,name Plate 'epica' | — | Reference |
| WBS | Player,compact Disc & Dvd Changer | — | Reference |
| WBT | P, IDT, M, TRIM, CLOTH, BRICK ARROW, AE 600, 11205 E 0 | — | Provisional |
| WBU | P, IDT, M, TRIM, CLOTH, BLUE STREET, AE 660, 11205 E 0 | — | Provisional |
| WBX | Ornamentation,name Plate 'verona' | — | Reference |
| WBY | Model Conversion Allure | — | Reference |
| WBZ | Wheelbase 185.5 Inch (108 Inch Cab Axle) | — | Reference |
| WC1 | P, SGR, R, MERCHANDISED PKG, CALIFORNIA PROMOTION, 20904 M 4 4, A | — | Provisional |
| WC2 | Merchandised Pkg Cadillac Commemorative Coupe this code has more than one documented meaning — filter by year | — | Reference |
| WC3 | P, APP, R, APPEARANCE PACKAGE, DEVILLE COMMERCIAL CHASSIS | 1996 | GM sourced |
| WC4 | P, SEAT RR, PASS THROUGH this code has more than one documented meaning — filter by year | 1995 | Provisional |
| WC5 | P, BDL, R, BODY LENGTH, CADILLAC STRETCH LIMOUSINE | 1998 | GM sourced |
| WC6 | Exhaust,heavy Duty Muffler | — | Reference |
| WC7 | Ornamentation Name Plate 'c2' this code has more than one documented meaning — filter by year | — | Reference |
| WC8 | P, VEHICLE, PERSONAL SECURITY 8" STRETCH, 21011 E 4 4, A | — | GM sourced |
| WC9 | Model Conversion Allure CX V6 | — | Reference |
| WCA | Ornamentation Lettering, Prestige | — | Reference |
| WCB | Ornamentation Lettering, Best | — | Reference |
| WCC | Ornamentation Lettering, 'cd' | — | Reference |
| WCD | P, MSM, R, MODEL CONVERSION, 1.4 SWING, 10914 E 8 | — | Provisional |
| WCE | P, MSM, R, MODEL CONVERSION, 1.6 SWING, 10914 E 8 | — | Provisional |
| WCK | Ornamentation Lettering 'd'art' | — | Reference |
| WCM | Ornamentation Lettering 'lt' | — | Reference |
| WCN | Ornamentation Lettering 'c' | — | Reference |
| WCO | Ornamentation Lettering 'm' | — | Reference |
| WCP | Sales Winner's Circle Package | — | Reference |
| WCQ | P, MAR, M, MARKET BRAND, NISSAN, 10507 | — | Provisional |
| WCR | Family Code, Carrier | 1989 | GM dated |
| WCS | Ornamentation Lettering 'exclusive' | — | Reference |
| WCT | Ornamentation Lettering 'ek' | — | Reference |
| WCU | Ornamentation Lettering 'mk' | — | Reference |
| WCV | Family Code, Cover, Wheel | 1998 | GM dated |
| WCW | Ornamentation Lettering 'dk' | — | Reference |
| WCX | Ornamentation Lettering 'x' | — | Reference |
| WCY | Ornamentation Lettering 'lk' | — | Reference |
| WCZ | Ornamentation Lettering 'eco' | — | Reference |
| WD0 | P, IDENTIFICATION, START OF PLATFORM CONTAINMENT VEHICLES | 1994 | GM sourced |
| WD1 | P, IDENTIFICATION, PILOT VEHICLE | 1987 | GM sourced |
| WD2 | P, IDENTIFICATION, PROTOTYPE VEHICLE | 1994 | GM sourced |
| WD3 | P, CONTROL, SPECIAL ORDER | 1993 | Provisional |
| WD4 | P, IDENTIFICATION, EFFECTIVE POINT CONTROL-SOP | 1997 | Provisional |
| WD5 | P, IDENTIFICATION, EFFECTIVE POINT CONTROL - ENGINE, 505 E 0 | — | GM sourced |
| WD6 | P, RWG, R, WINDOW RR, ANTENNA SPECIFIC, 10420 E 4 | — | GM sourced |
| WD7 | P, IDENTIFICATION, SPECIAL INSTRUCTION, 11210 | — | 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.