← 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 501–589 of 589 codes beginning with 5. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| 5W4 | Special Service Package | 2026 | GM sourced |
| 5W5 | C, VEHICLE, SPECIAL SERVICE, 4WD BASE (SEO) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5W6 | C, VEHICLE, SPECIAL SERVICE, 4WD UPLEVEL (SEO) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5W7 | LPO, Performance Air Intake System | 2022 | GM sourced |
| 5W8 | Accessory Ground Effects Package - Alternate Finish | — | Reference |
| 5WC | Accessory Charge Cord Set - 220/230v W/ Euro Plug Type 2 | — | Reference |
| 5WD | Accessory Trailer Hitch - Removable - 2100 Kg's Capacity | — | Reference |
| 5WF | Accessory Battery Protection Package | — | Reference |
| 5WG | Accessory Key - Folding Blade | — | Reference |
| 5WI | Utility Wall Latch Kit (LPO dealer-installed accessory) | 2026 | GM sourced |
| 5WJ | Accessory Wheel - 15' X 5.0 - J - Aluminum - Design 1 | — | Reference |
| 5WK | Accessory Brake Cooling Pkg - Splash Shield Removal | — | Reference |
| 5WO | Accessory Interior Trim - Steering Wheel Inserts | — | Reference |
| 5WP | Accessory Wheel - 18 X 8.0 - J - Aluminum - Design 1 | — | Reference |
| 5WR | Accessory Speaker Kit - Level 2 | — | Reference |
| 5WS | Accessory Speaker Kit - Level 3 | — | Reference |
| 5WT | Accessory Speaker Kit - Level 4 | — | Reference |
| 5WV | Accessory Molded Hood Protector - Clear | — | Reference |
| 5WW | Accessory Auxiliary Cooling Package - Towing | — | Reference |
| 5WX | Accessory Umbrella Holder - Footwell | — | Reference |
| 5WY | Accessory Head Liner - Alternate Finish | — | Reference |
| 5WZ | Accessory Cup Holder Organizer - Small Items | — | Reference |
| 5X0 | C, FLC, R, COVERING FLOOR, CARPET, W/O SEAT MOUNTING HOLES this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| 5X1 | Axle Rear 3.73 Ratio (dup With Gt4) | — | Reference |
| 5X2 | Axle,rear Wide Track Dual,3.73:1 Ratio | — | Reference |
| 5X3 | Axle,rear Wide Track Dual,4.10:1 Ratio | — | Reference |
| 5X4 | Axle,rear Wide Track Dual,4.56:1 Ratio | — | Reference |
| 5X5 | Axle,heavy Duty Dual Rear(3.73:1 Ratio) | — | Reference |
| 5X6 | Axle,heavy Duty Dual Rear(4.56:1 Ratio) | — | Reference |
| 5X7 | C, PROVISIONS, WRECKER EMERGENCY LAMP this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 5X8 | C, IDK, R, CYLINDER UNIT, SIDE CARGO & RR DOOR this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 5X9 | C, PROVISIONS, WRECKER PREP this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| 5XB | Accessory Charge Cord Set - 110/120v - Standard | — | Reference |
| 5XC | Accessory Snorkel - Air Intake | — | Reference |
| 5XD | Accessory Wheel - 19 X 9.0 - J - Aluminum - Design 1 | — | Reference |
| 5XI | Accessory Wheel - 21 X 8.5 - J - Aluminum - Design 1 | — | Reference |
| 5XL | Package Cxl Option 5 | — | Reference |
| 5XO | Accessory Wheel - 21 X 8.5 - J - FRT & 21 X 9.5 - J - RR - Aluminum - | — | Reference |
| 5XQ | Accessory Wheel - 19 X 8.5 - J - Aluminum - Design 3 | — | Reference |
| 5XR | Accessory Grille / Grille Inserts - Alternate Finish - Black Chrome | — | Reference |
| 5XS | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5XT | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5XU | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5XV | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5XW | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5XY | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5XZ | Accessory Wheel - 19 X 8.0 - J - FRT & 19 X 9.0 - J - RR - Aluminum - | — | Reference |
| 5Y0 | C, WIRING PROVISIONS, BODY BUILDER EMERGENCY LAMP (SEO) this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| 5Y1 | front center-seat delete | 2026 | GM sourced |
| 5Y2 | C, CSR, M, CLUSTER, INST, SPEEDO, TACH, AIR PRESS, FUEL, VOLTS, COOL TEMP, OIL this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5Y3 | Accessory Tow Ball - Trailer Hitch | — | Reference |
| 5Y4 | Accessory Cover - Trailer Hitch Tow Ball | — | Reference |
| 5Y5 | Accessory Steering Wheel - Alternate Finish 2 | — | Reference |
| 5Y6 | C, BAT, R, BATTERY, 1125 CCA (THREE) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5Y9 | C, CSR, M, CLUSTER, INST - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5YN | Accessory Badge - Interior Trim | — | Reference |
| 5YO | Accessory Data Recorder Interface - Vehicle Performance | — | Reference |
| 5YQ | Accessory Roof Panel Kit - Carbon Fiber | — | Reference |
| 5YS | P, TIR, M, TIRE ALL, LT215/75R15/C BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| 5YU | Accessory Wheel - 19 X 8.5 - J - FRT & 20 X 10.0 - J - RR - Aluminum | — | Reference |
| 5YV | Accessory Wheel - 19 X 8.5 - J - FRT & 20 X 10.0 - J - RR - Aluminum - Design 2 | — | Reference |
| 5YW | Accessory Wheel - 19 X 8.5 - J - FRT & 20 X 10.0 - J - RR - Aluminum - Design 3 | — | Reference |
| 5YX | Accessory Wheel - 19 X 8.5 - J - FRT & 20 X 10.0 - J - RR - Aluminum - Design 4 | — | Reference |
| 5YZ | Accessory Wheel - 19 X 8.5 - J - FRT & 20 X 10.0 - J - RR - Aluminum - Design 6 | — | Reference |
| 5Z1 | C, CONTAINER, ENG OIL PAN, 5 QUART this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 5Z2 | Accessory Wheel - 19 X 8.5 - J - FRT & 20 X 10.0 - J - RR - Aluminum - Design 7 | — | Reference |
| 5Z3 | Axle Rear Locking Differential | — | Reference |
| 5Z4 | WHEEL, SPARE - Carrier and lock delete this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| 5Z5 | C, HUBCAPS, - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5Z7 | 'baja' Package | — | Reference |
| 5Z9 | C, ANT, M, ANTENNA, RADIO, DELETE this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| 5ZA | Accessory Steering Wheel - Alternate Finish 1 | — | Reference |
| 5ZB | Accessory Center Cap - Wheel - Design 5 | — | Reference |
| 5ZC | Accessory Center Cap - Wheel - Design 6 | — | Reference |
| 5ZD | Accessory Center Cap - Wheel - Design 7 | — | Reference |
| 5ZE | Accessory Center Cap - Wheel - Design 8 | — | Reference |
| 5ZF | Accessory Center Cap - Wheel - Design 9 | — | Reference |
| 5ZG | Accessory Center Cap - Wheel - Design 10 | — | Reference |
| 5ZK | Accessory Window Control Kit - Power - Alternate Design 2 | — | Reference |
| 5ZN | Accessory Pubx - Utility Type - Aluminum | — | Reference |
| 5ZP | Accessory Pubx - Utility Type W/ladder Rack - Steel | — | Reference |
| 5ZS | Accessory Pubx - Utility Type - Steel | — | Reference |
| 5ZT | Accessory Footrest - 2nd Row Seat | — | Reference |
| 5ZU | Accessory Spoiler - Decklid - Design 2 | — | Reference |
| 5ZV | Accessory Spoiler - Decklid - Design 3 | — | Reference |
| 5ZW | Accessory Spoiler - Decklid - Design 4 | — | Reference |
| 5ZX | Accessory Customer Choice Package | — | Reference |
| 5ZY | Accessory Wheel-16 X 6.0 - J - Aluminum - Design 1 | — | Reference |
| 5ZZ | Accessory Spoiler - Decklid - Design 5 | — | 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.