← 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 702 codes beginning with Y. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| Y4G | P, PROVISIONS, CHROME WHEELS | 1997 | Provisional |
| Y4H | P, ORNAMENTATION, DASH PLAQUE & KEY FOBS | 1997 | Provisional |
| Y4J | P, COVERING, FLOOR MAT, FRT | 1997 | Provisional |
| Y4K | P, PROTECTOR, VEHICLE, COVER, 20128 P 1 | — | Provisional |
| Y4L | P, PROVISIONS, SPOILER, 1205 P 1 | — | Provisional |
| Y4M | P, PROVISIONS, SPOILER, RR, 10717 E 0 | — | Provisional |
| Y4T | P, SGR, R, MERCHANDISED PKG, LT | 1998 | GM sourced |
| Y4W | Model Conversion Buick GS With Opc Look And Awd | — | Reference |
| Y50 | Sales Package Cadillac, International Performance 002 | — | Reference |
| Y51 | Sales Package Cadillac, International Seating | — | Reference |
| Y52 | Sales Package Cadillac, International Utility | — | Reference |
| Y53 | Sales Package Technology Driver Awareness | — | Reference |
| Y54 | Sales Package Cadillac, Drivers Package | — | Reference |
| Y55 | Comfort Package | 2026 | GM sourced |
| Y56 | P, SGR, R, MERCHANDISED PKG, GRAN TOURING this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| Y57 | Lamp And Indicator Group | — | Reference |
| Y59 | P, SGR, R, MERCHANDISED PKG, PERFORMANCE PACKAGE | 1994 | Provisional |
| Y5A | Body,military 5250 Comm Shelter (type E) | — | Reference |
| Y5B | Body,military Ambulance(type C) | — | Reference |
| Y5C | Body,military Troop & Cargo Carrier(type B) | — | Reference |
| Y5D | Body,military Ambulance(complete Package) | — | Reference |
| Y5E | P, WAR, R, WARRANTY, ENGINE ONLY, 150,000 MILES, 5 YEARS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Y5F | Generator,100 Ampere,dual Delco | — | Reference |
| Y5G | Generator,200 Ampere,dual Delco | — | Reference |
| Y5H | Coast Guard Vehicle Identification | — | Reference |
| Y5J | Radio Provision,special Military | — | Reference |
| Y5K | Foreign Military Vehicle Identification | — | Reference |
| Y5N | P, WAR, R, WARRANTY, ENGINE ONLY, 50,000 MILES, 5 YEARS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Y5P | Military Troop Seats Package | — | Reference |
| Y5Q | P, WAR, R, WARRANTY, 100,000 MILES, 4 YEARS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Y5R | Cab/chassis,military (type D) | — | Reference |
| Y5S | Army Vehicle Identification | — | Reference |
| Y5T | Navy Vehicle Identification | — | Reference |
| Y5U | Marine Vehicle Identification | — | Reference |
| Y5V | Airforce Vehicle Identification | — | Reference |
| Y61 | Provision Front Fog Lamp Delete(export) this code has more than one documented meaning — filter by year | — | Reference |
| Y62 | Gold Wheel Paint | — | Reference |
| Y63 | Sales Package Cadillac, MR Performance | — | Reference |
| Y64 | P, SALES PACKAGE, 2000 MALIBU GOLD, ENHANCEMENT ORNAMENTATION this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| Y65 | Sales Package Cadillac, Ess 1 | — | Reference |
| Y66 | Adaptive Cruise Control, with Forward Automatic Braking, radar based system automatically adjusts speed | 2019 | Reference |
| Y67 | P, DISPLAY, REMINDER PACKAGE this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| Y69 | Economy Package,diesel(350 Diesel) | — | Reference |
| Y6A | P, SPP, R, PACKAGE, TRUCK ISUZU (1) | 1997 | Provisional |
| Y6B | P, SPP, R, PACKAGE, TRUCK ISUZU (2) | 1997 | Provisional |
| Y6C | Winterization Kit(no. 3) | — | Reference |
| Y6D | Winterization Kit(no. 4) | — | Reference |
| Y6E | P, SPP, R, PACKAGE, GMB-BLUE MACAW, FULL VERSION | 1998 | Provisional |
| Y6G | P, SALES PACKAGE, SPECIAL SERIES "WORLD CUP"-GMA | 1997 | Provisional |
| Y6H | P, PARTS PKG, GMB-S10 99 1/2 IMPROVEMENTS | 1998 | Provisional |
| Y6I | P, SPRING, RR, PARABOLIC TWO LEAVES | 1997 | Provisional |
| Y6J | P, SPP, R, PACKAGE, ARG MARKET-CORSA ENTRY LEVEL | 1998 | Provisional |
| Y6K | P, IDENTIFICATION, BREAKING POINT 2000 1/4 M.Y. | 1998 | Provisional |
| Y6L | P, PARTS PKG, CORSA IMPROVEMENTS VAR. 1 | 1998 | Provisional |
| Y6M | P, PARTS PKG, AIR CONDITIONING - ZEXEL | 1998 | Provisional |
| Y6N | P, SPP, R, PACKAGE, TRUCK "14 TON LONG WHEELBASE" AUTO TRANSMISSION | 1998 | Provisional |
| Y6P | P, SPP, R, PACKAGE, TRUCK "16 TON LONG WHEELBASE" AUTO TRANSMISSION | 1998 | Provisional |
| Y6Q | P, SPP, R, PACKAGE, EXPORT MARKET-CORSA WIND | 1998 | Provisional |
| Y6R | P, MODIFICATION, INDIA, REQUIREMENTS | 1998 | Provisional |
| Y6S | P, PARTS PKG, CORSA IMPROVEMENTS VAR. 2 | 1998 | Provisional |
| Y6T | P, PARTS PKG, CONTRAN RESOLUTION | 1998 | Provisional |
| Y6U | P, PARTS PKG, CORSA IMPROVEMENTS VAR. 3 | 1998 | Provisional |
| Y6V | P, CND, R, CONVENIENCE PKG, DELUXE UTILITY GRAND BLAZER | 1998 | Provisional |
| Y6W | P, PARTS PKG, HEAVY DUTY APPLICATION | 1998 | Provisional |
| Y6X | P, TEST, PRE ORDER EVALUATION | 1988 | Provisional |
| Y70 | P, PARTS PKG, HEADLINER - VALUE LEADER | 1991 | GM sourced |
| Y71 | P, PARTS PKG, HEADLINER - SUNROOF | 1993 | GM sourced |
| Y72 | P, PARTS PKG, HEADLINER | 1991 | GM sourced |
| Y73 | P, PARTS PKG, DELUXE HEADLINER this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| Y75 | Parts Package Headliner(export) this code has more than one documented meaning — filter by year | — | Reference |
| Y77 | P, LOCAL, DIV 3 - 227 | 1999 | Provisional |
| Y79 | Provision Options Load Bearing Seat Adj | — | Reference |
| Y7A | P, SPP, R, PACKAGE, SPECIAL SERIES "INTER" | 1998 | Provisional |
| Y7B | P, SPP, R, PACKAGE, SPECIAL SERIES "GREMIO" | 1998 | Provisional |
| Y7C | P, CONVERSION, ACT PROMOTED TO ZERO LEVEL | 1998 | Provisional |
| Y7D | P, SPP, R, PACKAGE, GMA-CORSA SUPER | 1998 | Provisional |
| Y7E | P, MSM, R, MODEL CONVERSION, GL | 1998 | GM sourced |
| Y7F | P, MSM, R, MODEL CONVERSION, GLX | 1998 | Provisional |
| Y7G | P, LOCAL, BRASIL, 10503 P, 5, 5, A | — | Provisional |
| Y7H | P, PARTS PKG, EXPORT TO "AMO" | 1998 | Provisional |
| Y7I | P, PARTS PKG, EXPORT TO "CENTRAL AMERICA" | 1998 | Provisional |
| Y7J | P, PARTS PKG, EXPORT TO "UNITED NATIONS" | 1998 | Provisional |
| Y7K | P, IDENTIFICATION, BREAKING POINT 2000 1/2 M.Y | 1999 | Provisional |
| Y7L | P, PARTS PKG, MISCELLANEOUS PARTS FOR FLEET VEHICLES | 1999 | Provisional |
| Y7M | P, SPP, R, PACKAGE, SPECIAL SERIES "MILLENIUM", 20408 E, 5, 5, A | — | Provisional |
| Y7N | P, PARTS, SHIPPED TO LINDEN (NAO) | 1999 | Provisional |
| Y7O | P, SPP, R, PACKAGE, "ENTRY LEVEL" VERSION, 20605 E, 5, 5, A | — | Provisional |
| Y7P | P, SPP, R, PACKAGE, S10 STD ENHANCED | 1999 | Provisional |
| Y7Q | P, SPP, R, PACKAGE, TRUCK - GMC 8-140 | 1999 | Provisional |
| Y7R | P, SPP, R, PACKAGE, "SPORT" VERSION, 20306 E, 5, 5, A | — | Provisional |
| Y7S | P, SPP, R, PACKAGE, GAMMA IMPROVEMENTS VAR. 3, 10627 E, 5, 5, A | — | Provisional |
| Y7T | P, SPP, R, PACKAGE, ASTRA 500/CDX - SPECIAL SERIES | 1999 | Provisional |
| Y7U | P, SPP, R, PACKAGE, "GSI" VERSION, 20306 E, 5, 5, A | — | Provisional |
| Y7V | P, PARTS PKG, FRONT AXLE SHAFT IMPROVEMENT | 1999 | Provisional |
| Y7W | P, ORNAMENTATION, NAME PLATE "MONZA", 222 E, 5, 5, A | — | Provisional |
| Y7X | P, SPP, R, PACKAGE, SPECIAL SERIES "EXPRESSION", 10604 E, 5, 5, A | — | Provisional |
| Y7Y | P, ORNAMENTATION, EMBLEM GRAND VITARA, 207 E, 5, 5, A | — | Provisional |
| Y7Z | P, ORNAMENTATION, EMBLEM TRACKER, 207 E, 5, 5, A | — | GM sourced |
| Y80 | Model Conversion Flagship | — | Reference |
| Y81 | P, SGR, R, MERCHANDISED PKG, PONTIAC FIREBIRD | 1998 | 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.