← 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 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 |
|---|---|---|---|
| 5II | Color Special Paint #9 | — | Reference |
| 5IJ | Color Special Paint #10 | — | Reference |
| 5IK | Color Special Paint #11 | — | Reference |
| 5IL | Color Special Paint #12 | — | Reference |
| 5IM | Color Special Paint #13 | — | Reference |
| 5IN | Color Special Paint #14 | — | Reference |
| 5IO | Color Special Paint #15 | — | Reference |
| 5IP | Color Special Paint #16 | — | Reference |
| 5IQ | Color Special Paint #17 | — | Reference |
| 5IR | Color Special Paint #18 | — | Reference |
| 5IS | Color Special Paint #19 | — | Reference |
| 5IT | Color Special Paint #20 | — | Reference |
| 5IU | Color Special Paint #21 | — | Reference |
| 5IV | Color Special Paint #22 | — | Reference |
| 5IW | Color Special Paint #23 | — | Reference |
| 5IX | Color Special Paint #24 | — | Reference |
| 5IY | Color Special Paint #25 | — | Reference |
| 5IZ | Color Special Paint #26 | — | Reference |
| 5J0 | C, EQUIPMENT, R-134A A/C SYS W/O PRECHARGE FLEETWOOD, IN this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5J1 | Calibration with keyless remote panic button exterior and lights/horn disable this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| 5J2 | C, GEN, M, GENERATOR, DELETE this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 5J3 | Calibration and surveillance mode interior and exterior lighting | 2026 | GM sourced |
| 5J4 | C, EQUIPMENT, GERMAN POSTAL VEHICLE (SEO) this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 5J5 | C, EQUIPMENT, R-12 A/C SYS FLEETWOOD, IN this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5J6 | C, PROVISIONS, NATURAL GAS (SEO) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5J7 | C, WHS, R, WHEEL SPARE, 16 X 6.0 (SEO) | 1993 | GM sourced |
| 5J8 | C, BRF, R, BUMPER FRT, SPECIAL PAINT W/MARKER LAMP & TIE DOWN PROVISIONS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5J9 | Calibration for taillamp flasher Red/White this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| 5JA | Color Special Paint #37 | — | Reference |
| 5JB | Color Special Paint #38 | — | Reference |
| 5JC | Color Special Paint #39 | — | Reference |
| 5JD | Color Special Paint #40 | — | Reference |
| 5JK | Tire All-p225/70hr 15/n BL P/pe ST TL Hwy (9591090) | — | Reference |
| 5JL | Front 6-Piston Brembo Brake Upgrade with Color Matched Rear Calipers (LPO dealer-installed accessory) | 2026 | GM sourced |
| 5JY | TONNEAU COVER, SOFT | 2026 | GM sourced |
| 5K0 | C, BRF, R, BUMPER FRT, CHROME (SEO) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5K1 | C, PROVISIONS, DAYTIME RUNNING LAMPS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5K2 | C, EQUIPMENT, SCHOOL BUS, HEAVY DUTY this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5K3 | C, CRUISE CONTROL, AUTOMATIC, ELECTRONIC (SEO) this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| 5K4 | Black bedside decal with reflective Bowtie (LPO dealer-installed accessory) this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| 5K5 | C, EQUIPMENT, FRITO-LAY PACKAGE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5K6 | C, BRF, R, BUMPER FRT, EXTRA WIDE, BLACK this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 5K7 | C, INSULATION PKG, BODY, ALUMINUM this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5K8 | C, INSULATION PKG, BODY, STEEL this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| 5K9 | Wheels, 20 inch Polished, 12-spoke | 2025 | GM sourced |
| 5KA | Accessory Decal Package - Bodyside - Design 4 | — | Reference |
| 5KB | Accessory Decal Package - Bodyside - Design 5 | — | Reference |
| 5KC | Accessory Decal Package - Bodyside - Design 6 | — | Reference |
| 5KE | Accessory Molding Kit - Exterior | — | Reference |
| 5KG | Accessory Valve Stem Cap - Extension - Design 2 | — | Reference |
| 5KH | Accessory Valve Stem Cap - Extension - Design 3 | — | Reference |
| 5KI | Accessory Cradle - Navigation System - Design 2 | — | Reference |
| 5KJ | Accessory Cradle - Navigation System - Design 3 | — | Reference |
| 5KK | Accessory Cradle - Navigation System - Design 4 | — | Reference |
| 5KU | Primary Color Exterior,shanghai Red (holdens 02) | — | Reference |
| 5KV | Accessory Mirror Covers - Alternate Finish 3 | — | Reference |
| 5KW | Accessory Exterior Appearance Package 2 | — | Reference |
| 5KX | Accessory Exterior Appearance Package 3 | — | Reference |
| 5KY | Accessory Exterior Appearance Package 4 | — | Reference |
| 5KZ | Accessory Protection Package | — | Reference |
| 5L0 | C, WHC, R, WHEEL COLOR, LUSTERLESS GREEN (SE0) | 1996 | GM sourced |
| 5L1 | C, LOCK CONTROL, REMOTE, KEYLESS ENTRY, PASSIVE (SEO) | 1998 | GM sourced |
| 5L2 | C, COMPRESSOR, AIR CONDITIONING, W/SUPPORTS ONLY this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| 5L3 | C, PANEL, TRIM, INTERIOR this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| 5L4 | C, PROVISIONS, ELECTRICAL-HIGH MOUNTED S/LPS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5L5 | THEFT DETERRENT SYSTEM FLEET IMMOBILIZER - In the absence of master key, reduces roadside key relearn process this code has more than one documented meaning — filter by year | 2022 | GM sourced |
| 5L6 | C, EQUIPMENT, PACKAGE, SPECIAL FLEET this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5L7 | C, VEM, R, MARKING, REFLECTIVE BLACK, U.S. MARINE CORPS VEH this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5L8 | C, PROVISIONS, LH FUEL FILL SYSTEM this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5L9 | C, VEHICLE PREPARATION, MISC PARTS REQ FROM GM T&B FOR MAGNA INT'L this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5LE | Garage door opener (LPO dealer-installed accessory) | 2025 | GM sourced |
| 5LG | Accessory Decal Package - Bodyside - Design 8 | — | Reference |
| 5LL | Realtree graphics on hood, bedside and tailgate, (dealer-installed) (LPO dealer-installed accessory) | 2026 | GM sourced |
| 5LM | Accessory Decal Package - Bodyside - Design 11 | — | Reference |
| 5LN | Accessory Decal Package - Bodyside - Design 12 | — | Reference |
| 5LO | Calibration for taillamp flasher Red/Red | 2026 | GM sourced |
| 5LP | Accessory Decal Package - Bodyside - Design 13 | — | Reference |
| 5LQ | Accessory Brake Upgrade Pkg 2 - Complete | — | Reference |
| 5LT | Package LT Option 5 | — | Reference |
| 5LZ | Package LZ Option 5 | — | Reference |
| 5M1 | C, MIR, M, MIRROR O/S, LH & RH, REMOTE CONTROL, ELECTRIC, COLOR (SEO) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5M2 | C, SALES INCENTIVE, PRICE LEADER (SEO) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5M3 | C, BDS, M, BODY EQUIPMENT, ONE PIECE LIFT GATE WITH LIFT GLASS (SEO), 10606 | — | GM sourced |
| 5M5 | C, EQUIPMENT, TRANSMISSION, MANUAL | 1998 | GM sourced |
| 5M7 | C, PROVISIONS, SPEEDOMETER CALIBRATION this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5M9 | C, LAMP, STOP, HIGH LEVEL - DELETE (SEO), 1018 | — | GM sourced |
| 5MB | Panel Trim, RR Compt, Side | — | Reference |
| 5MC | Panel Trim, Load Compt, Side | — | Reference |
| 5N0 | C, LEVER, PARKING BRAKE (HAND APPLY) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5N1 | C, DRS, R, DOOR RR, 38 IN, W/GLASS this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 5N2 | C, DRS, R, DOOR RR, 74 IN, W/GLASS this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 5N3 | C, DRS, R, DOOR RR, OVERHEAD, W/GLASS AND MAXIMUM SECURITY LOCK this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5N4 | C, PROVISIONS, HOMOLOGATED MOTOR HOME CHASSIS this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| 5N5 | Rear Camera Kit this code has more than one documented meaning — filter by year | 2022–2023 | GM sourced |
| 5N6 | C, PROVISIONS, FOR SHUTTLE BUS CHASSIS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 5N7 | C, CABLE, BATTERY POSITIVE (EXTENDED LENGTH) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 5N8 | Radio Provisions For Export Radio | — | Reference |
| 5N9 | P, PROVISIONS, CHASSIS, EXPORT | 1993 | GM sourced |
| 5P0 | C, PROVISIONS, ENGINE SHUTDOWN | 1997 | GM sourced |
| 5P1 | C, INTERIOR PACKAGE, PARCEL SERVICE, FEDERAL EXPRESS/CROWN BODY this code has more than one documented meaning — filter by year | 1991 | 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.