← 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 975 codes beginning with Q. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| Q40 | Tire All P235/55 R17 Al3 FRT & P255/50/r17 Al3 RR | — | Reference |
| Q41 | Tire All P235/50 R18 Al3 FRT & P255/45 R18 Al3 RR | — | Reference |
| Q42 | Tire All 255/40r19 FRT & 285/35r19 RR | — | Reference |
| Q43 | Wheel 17.0 X 8.0 FRT & 17.0 X 8.5 RR Aluminum, Painted, Flanged | — | Reference |
| Q44 | Wheel 18 X 9.5 FRT & 19 X 12 Rr, Aluminum, Painted Flangeless | — | Reference |
| Q45 | Wheel 18 X 8, J, Aluminum, 14 Spokes (turbine Design) | — | Reference |
| Q46 | Wheel 19 X 8.5, J, Aluminum, 11 Spokes (turbine Design) | — | Reference |
| Q48 | Wheel 18 X 8, Aluminum, Design 19 | — | Reference |
| Q4A | P, FIN, R, FLEET INCENTIVE, EST SERVICE (N/W-TRK GMLST), 20731 | — | Provisional |
| Q4B | P, GVW, M, GVW RATING, 6,200 LBS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Q4C | P, FIN, R, FLEET INCENTIVE, ALABAMA EDUCATION ASSOCIATION (H/W), 20918 | — | Provisional |
| Q4D | P, FIN, R, FLEET INCENTIVE, FIRST PIONEER FARM CREDIT (C/H/J/N/S/U/W), 21023 | — | Provisional |
| Q4E | P, FIN, R, FLEET INCENTIVE, WESTERN FIRE CHIEF'S ASSOCIATION (J/W-TRK CKGMLST), 20918 | — | Provisional |
| Q4F | P, FIN, R, FLEET INCENTIVE, EXECUTIVE CAR LEASING COMPANY (D/K-TRK CKGMLST), 21009 | — | Provisional |
| Q4G | P, FIN, R, FLEET INCENTIVE, BROWN SHOE (W), 20918 | — | Provisional |
| Q4H | P, FIN, R, FLEET INCENTIVE, CAN CABLE (TRK ML), 20918 | — | Provisional |
| Q4I | P, FIN, R, FLEET INCENTIVE, CENTURY BUSINESS SERVICES (TRK G), 20918 | — | Provisional |
| Q4J | P, FIN, R, FLEET INCENTIVE, CENTERLINE CAR RENTAL (J/U), 20923 | — | Provisional |
| Q4K | P, FIN, R, FLEET INCENTIVE, FERRERO U.S.A. (H/J/N/U/W), 20923 | — | Provisional |
| Q4L | P, FIN, R, FLEET INCENTIVE, RICOH CORPORATION (N/W), 20923 | — | Provisional |
| Q4M | P, FIN, R, FLEET INCENTIVE, ANDERSON NEWS COMPANY (TRK CKG), 20925 | — | Provisional |
| Q4N | P, FIN, R, FLEET INCENTIVE, SKANSKA, USA (C/D/H/J/K/N/U/W-TRK CKGMLST), 21001 | — | Provisional |
| Q4Q | P, FIN, R, FLEET INCENTIVE, PROGRASS (TRK CKST), 21001 | — | Provisional |
| Q4R | P, FIN, R, FLEET INCENTIVE, EMMIS COMMUNICATIONS (H/J/U/W-TRK CKGJMLST), 21001 | — | Provisional |
| Q4S | P, FIN, R, FLEET INCENTIVE, NEWSPAPER AGENCY CORPORATION (TRK CKG), 21009 | — | Provisional |
| Q4T | P, FIN, R, FLEET INCENTIVE, SUMNER GROUP INC. (H/N/U/W-TRK GMLST), 20926 | — | Provisional |
| Q4U | P, FIN, R, FLEET INCENTIVE, TOTALFINAELF (B/D/S/U/W-TRK CKGST), 21001 | — | Provisional |
| Q4V | P, FIN, R, FLEET INCENTIVE, SUNOCO, INC. (W-TRK CKGST), 20926 | — | Provisional |
| Q4W | P, FIN, R, FLEET INCENTIVE, NUI ELIZABETHTOWN GAS (C/J/N/U/W-TRK CKGST), 21001 | — | Provisional |
| Q4X | P, FIN, R, FLEET INCENTIVE, NIXON POWER SERVICES, CO. (TRK CKG), 20926 | — | Provisional |
| Q4Y | P, FIN, R, FLEET INCENTIVE, FESSENDEN HALL, INC. (B/S/U/V/W-TRK CKGST), 20927 | — | Provisional |
| Q4Z | P, FIN, R, FLEET INCENTIVE, YAMAS CONTROL GROUP, INC. (N/W-TRK CKGMLST), 20927 | — | Provisional |
| Q50 | Wheel 18 X 7.5, Steel | — | Reference |
| Q52 | Wheel 18 X 8, Aluminum, Design 33 | — | Reference |
| Q54 | Wheel 17 X 7, J, Aluminum, Styled, 5 Flat Spokes | — | Reference |
| Q56 | Wheel 18 X 8, Aluminum, Design 4 | — | Reference |
| Q58 | Wheel 18 X 8, J, Aluminum, 5 Double Spokes,(turbine Design) | — | Reference |
| Q59 | Wheel 18 X 8, Aluminum, Design 47 | — | Reference |
| Q5A | P, FIN, R, FLEET INCENTIVE, WESLEYAN UNIVERSITY (TRK CKGMLST), 20916 | — | Provisional |
| Q5B | P, FIN, R, FLEET INCENTIVE, HARRIS RANCH, INC. (TRK CKST), 20916 | — | Provisional |
| Q5C | P, FIN, R, FLEET INCENTIVE, WORTHINGTON INDUSTRIES (G/H/W), 20916 | — | Provisional |
| Q5D | P, FIN, R, FLEET INCENTIVE, H.D. FOWLER COMPANY (TRK CKST), 20916 | — | Provisional |
| Q5E | P, FIN, R, FLEET INCENTIVE, GROCERY WORKS (TRK G), 20916 | — | Provisional |
| Q5G | Fleet Incentive Blount International (c/h/w-trk Ckmlst) | — | Reference |
| Q5I | Tire All 205/50r17 SL 89v BW Hw3 | — | Reference |
| Q5Q | Tire All 225/45r17 SL 91v BW Hw3 | — | Reference |
| Q5S | Wheel 17 X 6, J, Aluminum, 15 Holes | — | Reference |
| Q5U | WHEELS - 17 inch x 8 inch | 2026 | GM sourced |
| Q5V | Wheel 19 X 10.0, J, FRT & 20 X 12.0, J, Rr, Aluminum, Design 3 | — | Reference |
| Q5W | Wheel 17 X 8.0, J, Aluminum, Design 1 | — | Reference |
| Q60 | Wheel 18 X 8, Aluminum, 7 Twin Spokes | — | Reference |
| Q61 | P, WHR, M, WHEEL RR, 20 X 7.5, DEMOUNTABLE RIMS this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| Q62 | Wheel 20 X 8, Aluminum, Flangeless | — | Reference |
| Q63 | Tire All 235/60r18 FRT & 255/55r18 RR | — | Reference |
| Q67 | Wheel 19 X 8.5, J, Aluminum, Styled, 6 Spokes (trapezodial) | — | Reference |
| Q68 | Wheel 19 X 8.5, Aluminum, Design 20 | — | Reference |
| Q6A | Wheel 19 X 10 FRT & 20 X 12 Rr, Aluminum, Cast, Painted | — | Reference |
| Q6B | Wheel 19 X 10 FRT & 20 X 12 Rr, Aluminum, Cast, Chrome | — | Reference |
| Q6D | Wheel 18 X 7, Aluminum, Machined | — | Reference |
| Q6J | Wheel 19 X 10 FRT & 20 X 12 Rr, Aluminum, Cast, Painted Var 1 | — | Reference |
| Q6K | Tire All 195/65r15 SL 91h BW Hw3 | — | Reference |
| Q6L | Tire All 205/55r16 SL 91h BW Hw4 | — | Reference |
| Q6M | Wheel 19 X 8.5, J, Aluminum, Design 2 | — | Reference |
| Q6P | Wheel 19 X 9.0, J, FRT & 19 X 9.5, J, Rr, Aluminum, Design 2 | — | Reference |
| Q6U | Wheel 19 X 10.0, J, FRT & 20 X 12.0, J, Rr, Aluminum, Design 7 | — | Reference |
| Q6X | Wheel 18 X 8.0, J, Aluminum, Design 6 | — | Reference |
| Q70 | Wheel 19 X 8.5, Aluminum, Design 34 | — | Reference |
| Q71 | P, WHF, M, WHEEL FRT, 20 X 7.5, 10 HOLE, 335.0MM BC, HUB PILOTED, 165.0MM, OFFSET 5 DEGREES | 1998 | Provisional |
| Q72 | P, WHF, M, WHEEL FRT, 22.5 X 8.25, 10 HOLE, 335.0MM BC, DCT, HUB PILOTED168.0MM OFFSET | 1998 | Provisional |
| Q73 | P, WHR, M, WHEEL RR, 20 X 7.5, 10 HOLE, 335.0MM BC, HUB PILOTED 165.0MMOFFSET 5 DEGREES | 1998 | Provisional |
| Q74 | P, WHR, M, WHEEL RR, 22.5 X 8.25, 10 HOLE 335.0MM BC, DCT, HUB PILOTED 168.0 MM OFFSET | 1998 | Provisional |
| Q76 | Wheel 18 X 9.5 FRT & 19 X 12 Rr, Chrome | — | Reference |
| Q7B | Wheel 18 X 8.0, J, Aluminum, Design 10 | — | Reference |
| Q7E | Wheel 19 X 8.5, J, FRT & 20 X 10.0, J, Rr, Aluminum, Design 3 | — | Reference |
| Q7F | Wheels, 20 inch Ultra-bright machined wheels with bright chrome inserts | 2026 | GM sourced |
| Q7H | Wheels, 20 inch Ultra-bright machined aluminum wheels with gloss black inserts | 2026 | GM sourced |
| Q7J | Wheels, 20 inch Bright face wheels with dark painted pockets | 2026 | GM sourced |
| Q7L | Wheels, 22 inch x 9 inch aluminum | 2019 | Reference |
| Q7M | Wheel 22 X 9.0, J, Aluminum, Design 3 | — | Reference |
| Q7N | Wheels, 20 inch High Gloss black aluminum wheels, 8 spokes | 2026 | GM sourced |
| Q7P | Wheel 19 X 8.5, J, Aluminum, Design 11 | — | Reference |
| Q7Q | Wheels, 20 inch transit aluminum wheels for LPO 20 inch wheels and tires | 2026 | GM sourced |
| Q7R | Wheel 20 X 8.5, J, Aluminum, Design 13 | — | Reference |
| Q7S | Wheel 19 X 8.5, J, FRT & 20 X 10.0, J, Rr, Aluminum, Design 1 | — | Reference |
| Q7T | Wheel 19 X 8.5, J, FRT & 20 X 10.0, J, Rr, Aluminum, Design 2 | — | Reference |
| Q7U | Wheel 21 X 8.5, J, FRT & 21 X 9.5, J, Rr, Aluminum, Design 1 | — | Reference |
| Q7V | Wheel 19 X 8.5, J, Aluminum, Design 5 | — | Reference |
| Q7Z | Wheel 18 X 9.5, J, FRT & 19 X 12.0, J, Rr, Aluminum, Design 9 | — | Reference |
| Q80 | P, WHF, M, WHEEL FRT, 22.5 X 6.75, 8 HOLE, 275MM BC FN this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Q81 | Wheels, 18 inch x 8.5 inch Gloss Black AEV this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| Q82 | P, WHF, M, WHEEL FRT, 19.5 X 6.75, 8 HOLE, 275MM BC FN, 5.66 OFFSET this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| Q83 | P, WHR, M, WHEEL RR, 19.5 X 6.75, 8 HOLE, 275MM BC FN, 5.66 OFFSET this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| Q84 | P, WHF, M, WHEEL FRT, 20 X 6.5, 8 HOLE, 275MM BC FN this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Q85 | P, WHR, M, WHEEL RR, 20 X 6.5, 8 HOLE, 275MM BC FN this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Q86 | Wheels, 20 inch machined aluminum with Grazen Metallic painted accents, 10-spoke this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| Q87 | C, WHR, M, WHEEL RR, 22.5 X 8.25, 10 HOLE, 285.75MM BC, PILOTED HUB, (ACCURIDE 28408) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Q88 | P, WHF, M, WHEEL FRT, 22.5 X 7.5, 8 HOLE, 275MM BC FN this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Q89 | Wheels, 18 inch x 8.5 inch 12-spoke High Gloss Black aluminum wheels with laser etching this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| Q8A | Wheel 18 X 9.5 FRT & 19 X 12 Rr, Chrome, Var 1 | — | Reference |
| Q8B | Wheel 18 X 8.5, J, FRT & 19 X 10.0, J, Rr, Aluminum, Design 6 | — | 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.