← 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 671 codes beginning with S. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| S01 | Accessory Headlamps, Alternate Finish | — | Reference |
| S02 | Accessory Headphones, Noise Canceling | — | Reference |
| S03 | Accessory Headrest | — | Reference |
| S04 | Accessory Wheel - 19' - Aluminum - Design 6 | — | Reference |
| S05 | Accessory Heater - Battery | — | Reference |
| S07 | Accessory Heater Kit, Parking | — | Reference |
| S08 | Highway Safety Kit (LPO dealer-installed accessory) | 2025 | GM sourced |
| S09 | Accessory Hitch Mount Assembly | — | Reference |
| S0A | Accessory Holder, License Plate | — | Reference |
| S0B | Accessory Holder - Sun Glass | — | Reference |
| S0E | Accessory Hood Handles, Alternate Finish, Painted | — | Reference |
| S0F | Accessory Hood Latch, Alternate Finish | — | Reference |
| S0I | Accessory Hood Louver, Alternate Finish, Chrome | — | Reference |
| S0J | Accessory Hood Louver - Alternate Finish - Painted | — | Reference |
| S0L | Accessory Illuminated Cup Holders | — | Reference |
| S0M | Illuminated front and rear door sill plates (LPO dealer-installed accessory) | 2026 | GM sourced |
| S0O | Accessory Illuminated Foot Wells | — | Reference |
| S0P | Console insert, hanging tote (LPO dealer-installed accessory) | 2019 | Reference |
| S0Q | Accessory Interior Trim Kit, Hydrographic | — | Reference |
| S0R | Accessory Interior Trim Kit, In-mold Film | — | Reference |
| S0S | Accessory Adapter - Trailer Harness - 12s | — | Reference |
| S0T | Realtree trim accents on interior door panels, (dealer-installed) (LPO dealer-installed accessory) | 2026 | GM sourced |
| S0W | Accessory Cargo Hooks - Trunk/rr Compt | — | Reference |
| S0Y | Accessory Lamps - Cargo Area | — | Reference |
| S0Z | Accessory Protector - Seatback | — | Reference |
| S10 | Package Trim Level 10 | — | Reference |
| S12 | Package Trim Level 12 | — | Reference |
| S13 | Package Trim Level 13 | — | Reference |
| S14 | Package Trim Level 14 | — | Reference |
| S15 | Package Trim Level 15 | — | Reference |
| S16 | Package Trim Level 16 | — | Reference |
| S17 | Package Trim Level 17 | — | Reference |
| S18 | Package Trim Level 18 | — | Reference |
| S19 | Package Trim Level 19 | — | Reference |
| S1A | P, FIN, R FLEET INCENTIVE, SNOWDEN RIVER CORP. DBA TRULAND SYSTEMS, (TRK CKGML), 11023 | — | Provisional |
| S1B | P, FIN, R FLEET INCENTIVE, SWEDISH MATCH NORTH AMERICA, INC (B/C/D/H/N/U/W TRK GMLST), 20812 | — | Provisional |
| S1C | P, FIN, R FLEET INCENTIVE, SPRINT/UNITED TELEPHONE (H/J/N/U/W-TRK CKGMLPST) | 1998 | GM sourced |
| S1D | P, FIN, R FLEET INCENTIVE, BLACK & DECKER (C/G/H/K/N/U/W-TRK CKGMLST), 1201 | — | Provisional |
| S1E | P, FIN, R FLEET INCENTIVE, MCCORMICK & COMPANY (C/H/K/L/N/U/W-TRK CKGML), 21023 | — | Provisional |
| S1F | P, FIN, R FLEET INCENTIVE, ADVANTAGE RENT-A-CAR (C/F/H/J/K/M/N/S/U/W-TRK, CKGMLST), 208 | — | Provisional |
| S1G | Wheel Spare 17 X 4.5, T, Steel, Design 1 | — | Reference |
| S1H | Off-Road Recovery Kit (LPO dealer-installed accessory) | 2026 | GM sourced |
| S1J | P, FIN, R FLEET INCENTIVE, SUPER STAR RENT-A-CAR (D/H/J/K/M/N/S/U/W-TRK, CKGMST) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| S1K | P, FIN, R FLEET INCENTIVE, TRYNE/DOLLAR DENVER RENT-A-CAR (A/C/D/H/J/K/M/N/S/U/W- TRK CKGMST) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| S1L | Wheel Spare 19 X 8.0, J, Aluminum, Design 1 | — | Reference |
| S1M | Accessory Container - Lockable Storage - Cargo Area - Design 1 | — | Reference |
| S1N | P, FIN, R FLEET INCENTIVE, HANNABERY, INC (-TRK GST), 20328 | — | Provisional |
| S1O | Console Mounted Safe - Dealer Installed. Requires (A50) Front Bucket Seats | 2026 | GM sourced |
| S1P | P, FIN, R FLEET INCENTIVE, ESTEE LAUDER COMPANIES (G/H/K/U/W-TRK ST) | 1998 | GM sourced |
| S1Q | Accessory Voltage Provider - Trailer Harness | — | Reference |
| S1R | Accessory Wheel - 20 X 8.0 - J - Aluminum - Design 3 this code has more than one documented meaning — filter by year | — | Reference |
| S1S | Accessory Wheel - 20 X 8.0 - J - Aluminum - Design 4 T) this code has more than one documented meaning — filter by year | — | Reference |
| S1T | P, FIN, R FLEET INCENTIVE, B & V CONSTRUCTION (TRK-CKST), 816 | — | Provisional |
| S1U | Wheel, 18 inch x 8.5 inch | 2026 | GM sourced |
| S1V | Accessory Headphones - Rse | — | Reference |
| S1W | Wheel, 18 inch aluminum spare | 2026 | GM sourced |
| S1X | Accessory Tonneau Cover - Hard Shell W/sport Bar - Design 1 | — | Reference |
| S1Y | Accessory Tonneau Cover - Hard Shell W/sport Bar - Design 2 | — | Reference |
| S1Z | Wheel Spare 16 X 7.0, J, Aluminum, Design 2 | — | Reference |
| S20 | Package Trim Level 20 | — | Reference |
| S21 | P, FIN, R FLEET INCENTIVE, ACRT, INC. (TRK CKST), 11130 | — | Provisional |
| S22 | P, FIN, R FLEET INCENTIVE, RED BULL (B-TRK CKGST), 21101 | — | Provisional |
| S23 | P, FIN, R FLEET INCENTIVE, FARMER BROTHERS COMPANY (TRK CKGML), 11130 | — | Provisional |
| S24 | P, FIN, R FLEET INCENTIVE, DHL AIRWAYS (H/J/K/W-TRK CKGHST), 20430 | — | GM sourced |
| S25 | P, FIN, R FLEET INCENTIVE, JMC ENTERPRISE LLC (TRK ST), 20404 | — | GM sourced |
| S26 | P, FIN, R FLEET INCENTIVE, LUCKY CAB & LIMOUSINE (U/W-TRK MLST), 20417 | — | GM sourced |
| S27 | P, FIN, R FLEET INCENTIVE, ED CRAMER & SONS (TRK CKST), 20408 | — | Provisional |
| S2A | P, FIN, R FLEET INCENTIVE, AIR LIQUIDE AMERICA CORP (W/U-TRK CKGMLPST) | 1998 | GM sourced |
| S2B | Wheel, 17 inch x 8 inch full-size, aluminum spare | 2026 | GM sourced |
| S2C | P, FIN, R FLEET INCENTIVE, MOORE BUSINESS FORMS, INC (H/W) this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| S2D | P, FIN, R FLEET INCENTIVE, ARMSTRONG COMPANIES (N/W-TRK CKGML), 11128 | — | Provisional |
| S2E | Wheel, 18 inch aluminum spare | 2026 | GM sourced |
| S2F | Wheel Spare 18 X 8.0, J, Aluminum, Design 1 | — | Reference |
| S2G | Wheel Spare 18 X 8.0, J, Aluminum, Design 2 | — | Reference |
| S2H | Accessory Pubx Rigid Canopy this code has more than one documented meaning — filter by year | — | Reference |
| S2I | P, FIN, R FLEET INCENTIVE, MASTEC, INC (W-TRK CKGMLST), 10119 | — | Provisional |
| S2J | Wheel Spare 18 X 8.0, J, Aluminum, Design 3 | — | Reference |
| S2K | P, FIN, R FLEET INCENTIVE, ACCENT RENT A CAR, INC (B/J/N/U/W-TRK CKGMLST), 20812 | — | Provisional |
| S2L | Accessory Luggage Set | — | Reference |
| S2M | P, DIRECT SALES, IBC | 1999 | Provisional |
| S2N | P, FIN, R FLEET INCENTIVE, RUMPKE CONSOLIDATED WASTE CO. (TRK CKGMLST), 11101 | — | Provisional |
| S2O | Accessory Decal Package - Interior - Design 1 | — | Reference |
| S2P | P, FIN, R FLEET INCENTIVE, HUGHES SUPPLY, INC (C/H/N/U/W-TRK CKGMLST) | 1999 | GM sourced |
| S2Q | P, FIN, R FLEET INCENTIVE, NATIONAL SEMICONDUCTOR (H/U/W-TRK CKST), 20612 this code has more than one documented meaning — filter by year | — | GM sourced |
| S2R | P, FIN, R FLEET INCENTIVE, APL LIMITED (C/W-TRK CKGMLST), 20912 | — | Provisional |
| S2S | P, FIN, R FLEET INCENTIVE, THE CLEVELAND INDIANS BASEBALL CLUB (H/W), 11212 | — | Provisional |
| S2T | P, FIN, R FLEET INCENTIVE, DICK'S SPORTING GOODS (W-TRK CK), 11114 | — | Provisional |
| S2U | P, FIN, R FLEET INCENTIVE, WIN FIRST (TRK CKGST), 10201 | — | Provisional |
| S2V | Accessory Decal Package - Interior - Design 2 this code has more than one documented meaning — filter by year | — | Reference |
| S2W | P, FIN, R FLEET INCENTIVE, ROBERT BOSCH CORP(B/C/D/G/H/J/K/N/S/U/V/W, -TRK CGJKMLST), 20926 | — | Provisional |
| S2X | P, FIN, R FLEET INCENTIVE, KENNY INDUSTRIAL SERVICES (TRK CKG), 11205 | — | Provisional |
| S2Y | P, FIN, R FLEET INCENTIVE, CCC GROUP, INC. (TRK CK), 20128 this code has more than one documented meaning — filter by year | — | GM sourced |
| S2Z | P, FIN, R FLEET INCENTIVE, RPM, INC. (B/D/H/K/U/W CKST), 21016 | — | Provisional |
| S31 | Wheel Spare 17 X 7.0, J, Aluminum, Design 4 | — | Reference |
| S33 | Wheel 17 X 7.0, J, Aluminum, Design 20 | — | Reference |
| S3A | P, TTR, R TIRE TREAD REAR, HIGHWAY | 1986 | GM sourced |
| S3B | P, TTR, R TIRE TREAD REAR, EXTRA STRENGTH HIGHWAY | 1986 | GM sourced |
| S3C | P, TTR, R TIRE TREAD REAR, PREMIUM HIGHWAY | 1986 | GM sourced |
| S3D | P, TTR, R TIRE TREAD REAR, HIGHWAY PREMIUM TRACTION | 1986 | GM sourced |
| S3E | P, TTR, R TIRE TREAD REAR, HIGHWAY ON/OFF ROAD TRACTION this code has more than one documented meaning — filter by year | 1986 | 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.