← 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 401–500 of 777 codes beginning with R. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| RGK | RST Capability Package this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| RGL | Illumination Package (LPO dealer-installed accessory) | 2026 | GM sourced |
| RGM | AT4 Premium Package | 2026 | GM sourced |
| RGN | Sun & Power Step Package | 2026 | GM sourced |
| RGP | Tire All 165/60r15 SL 77t BW Hwy | — | Reference |
| RGS | Tire All 235/55r18 XL 104h BW Als | — | Reference |
| RGU | Tire All P245/40zr21 100y XL Hw4 (front) 275/35zr21 103y HW 4 (rear) | — | Reference |
| RGV | Tire All 245/45r18 SL 96w BW Hw4 Var 1 | — | Reference |
| RH6 | Wheel Spare 14 X 5.5, J, Aluminum, Design 1 | — | Reference |
| RHD | P, DRV, M VEHICLE DRIVE, RIGHTHAND DRIVE this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| RHF | Tire, spare LT275/70R18 blackwall Goodyear Wrangler Territory MT | 2026 | GM sourced |
| RHG | Tire All P275/55r20 SL 111t BW AT | — | Reference |
| RHH | Tire All P285/45r22 SL 110h BW AT | — | Reference |
| RHL | P, WHF, M WHEEL FRT, 22.5 X 9.0, RIM DCT this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RHM | Tire, spare LT265/70R17 all-terrain, blackwall | 2026 | GM sourced |
| RHN | Tire All P245/45r17 SL 95v BW Rf3 | — | Reference |
| RHO | Wheels, 20 inch x 9 inch Sterling Silver painted Aluminum | 2026 | GM sourced |
| RHP | Tire All P245/40r18 SL 93v BW Rf3 | — | Reference |
| RHQ | P, WIR, R HARNESS, ASM, TAIL & STOP LAMP this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| RHS | Tire All 255/35r19 XL 96v BW Rf3 | — | Reference |
| RHT | FAMILY CODE, ROOF, HEIGHT, 804 | — | Provisional |
| RHU | Tire Spare 235/50r18 XL 101w BW Hw4 | — | Reference |
| RHV | Tire All 235/50r18 XL 101w BW Hw4 | — | Reference |
| RHX | Tire All 195/65r15 SL 91h BW Hw2 Var. 1 | — | Reference |
| RHZ | Tire Spare 165/65r14 SL 79t BW Spr | — | Reference |
| RI8 | Tires, 265/65R18SL MT 114S blackwall Goodyear Wrangler DuraTrac | 2019 | Reference |
| RIA | All-weather floor liners (LPO dealer-installed accessory) | 2026 | GM sourced |
| RIB | All-weather floor liners (LPO dealer-installed accessory) | 2026 | GM sourced |
| RIK | Black Sierra nameplates (LPO dealer-installed accessory) | 2026 | GM sourced |
| RJ0 | Tire All P235/45r18 SL 94h BW Al3 | — | Reference |
| RJ1 | Tire Spare 155/70r14 SL 77t BW Spr | — | Reference |
| RJ8 | Tire All 245/40r19 XL 98y BW Hwy (front) 275/35r19 XL 100y BW Hw4 (rear) | — | Reference |
| RJA | Tire Spare T135/70r16 SL 100m BW Spr | — | Reference |
| RJB | Tire All 235/50r19-sl 99h BW Hw4 | — | Reference |
| RJC | Tire All P235/50r19 SL 99h BW Al3 | — | Reference |
| RJD | Tire Spare T155/90r16 SL 110m BW Spr | — | Reference |
| RJE | Tire All 235/60r17 Sl102h BW Hw3 | — | Reference |
| RJG | Tire All 235/55r18 SL 100h BW Hw3 | — | Reference |
| RJH | Tire All 235/65r17 SL 104h BW Hw3 | — | Reference |
| RJJ | Wheel 18 X 8.5, J, FRT & 18 X 9.0, J, Rr, Aluminum, Design 2 | — | Reference |
| RJM | Tire All 205/55r16 SL 91v BW Hw3 | — | Reference |
| RJO | Tire All 175/70r13 SL 82t BW Hwy | — | Reference |
| RJP | Tire All 225/35r19 XL 88y BW Rf3 (front) & 225/35r19 XL 91y BW Rf3 (rear) | — | Reference |
| RJQ | Wheel 19 X 8.0, J, FRT & 19 X 9.0, J, Rr, Aluminum, Design 1 | — | Reference |
| RJT | Tire Spare 225/55r17 SL 97v BW Hw4 | — | Reference |
| RJV | Tire All 185/55r15 SL 82t BW Hw3 (front) 195/55r15 SL 85t B W Hw3 (rear) | — | Reference |
| RJW | Wheel 15 X 6.0, J, FRT & 15 X 6.5, J, Rr, Aluminum, Design 1 | — | Reference |
| RJX | Wheel 17 X 6.5, J, Aluminum, Design 2 | — | Reference |
| RJZ | Tire All 245/45r19 SL 98v BW Al3 | — | Reference |
| RK2 | Tire Spare 175/70r13 SL 82t BW Hwy | — | Reference |
| RK3 | Tire Spare P215/60r16 SL 98n BW Al3 | — | Reference |
| RK4 | Tire Spare 205/60r16 SL 98n BW Hw3 | — | Reference |
| RK5 | Tire Spare 215/60r16 SL 98n BW Hw3 | — | Reference |
| RK6 | Tire Spare 205/65r15 SL 98n BW Hw3 | — | Reference |
| RKC | Tire All 285/35zr20 SL 100y BW Hw4 | — | Reference |
| RKG | Tire All 205/50r17 SL 89h BW Hw3 | — | Reference |
| RKH | Tire All 205/55r16 SL 91v BW Hw4 | — | Reference |
| RKJ | Tire All P205/50r17 SL 88h BW Al3 | — | Reference |
| RKK | Tire All 245/40r18 SL 93y BW Rf4 (front) & 275/35r18 SL 95y BW Rf4 (rear) | — | Reference |
| RKN | Tire All 185/65r15 SL 88t BW Hwy Var 2 | — | Reference |
| RKO | Tire All 215/45r18 SL 89h BW Hw3 | — | Reference |
| RKP | Tire All 235/50r18 SL 97w BW Hw4 | — | Reference |
| RKQ | Tire All 245/45r19 SL 98w BW Hw4 | — | Reference |
| RKR | Family Code, Molding Rocker | 1989 | GM dated |
| RKS | Tire Spare 215/70r16 SL 100t BW Hwy | — | Reference |
| RKW | Tire All 225/50r17 SL 94v BW Hw1 | — | Reference |
| RKX | Tires, P265/65R18 all-season, blackwall | 2019 | Reference |
| RKZ | Tire Spare 185/75r14 SL 89h BW Hw1 | — | Reference |
| RL1 | Package Cxl Peg 1 | — | Reference |
| RL2 | Package Cxl Peg 2 | — | Reference |
| RL3 | Package Cxl Peg 3 | — | Reference |
| RL4 | Package Cxl Peg 4 | — | Reference |
| RL5 | Package Cxl Peg 5 | — | Reference |
| RL6 | Package Cxl Peg 6 | — | Reference |
| RL7 | Tire Spare 195/65r15 SL 91h BW Hw2 | — | Reference |
| RL8 | Tire Spare 195/65r15 SL 91h BW Hw3 | — | Reference |
| RLD | Tire All 235/55r18 SL 100h BW Al3 | — | Reference |
| RLE | P, WHF, M WHEEL FRT, 22.5 X 7.5, 10 HOLE, 11.25 BC BS DCT BAL, (FI-27403) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RLF | P, WHR, M WHEEL RR, 22.5 X 7.5, 10 HOLE, 11.25 BC BS DCT BAL, (FI-27403) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RLH | Family Code, Component RR LH | 1988 | GM dated |
| RLJ | Wheel Spare 15 X 4.0, B, Steel, Design 1 | — | Reference |
| RLX | Appearance Package Luxury Interior | — | Reference |
| RM7 | Wheel, 17 inch x 8 inch full-size, steel spare | 2026 | GM sourced |
| RMA | P, MDR, R MOLDING ROOF, HYDROGRAPHIC, CARBON FIBER, 20731 | — | Provisional |
| RMB | P, MDR, R MOLDING ROOF, HYDROGRAPHIC, LEOPARD PRINT, 20731 | — | Provisional |
| RMC | P, MDR, R MOLDING ROOF, HYDROGRAPHIC, BLUE BUBBLE, 20731 | — | Provisional |
| RME | P, MDR, R MOLDING ROOF, HYDROGRAPHIC, BRUSHED ALUMINUM, 20731 | — | Provisional |
| RMF | P, MDR, R MOLDING ROOF, HYDROGRAPHIC, CRACKED GLASS, 20731 | — | Provisional |
| RMG | Molding Decklid Chrome | — | Reference |
| RML | Molding Rear Chrome | — | Reference |
| RMW | Matching spare wheel and tire with programmable tire pressure monitor | 2026 | GM sourced |
| RN2 | Illuminated front Red GMC emblem (LPO dealer-installed accessory) | 2026 | GM sourced |
| RN6 | Wheels, 22 inch Transit steel, painted Black | 2026 | GM sourced |
| RN9 | Model Conversion Cadillac Cts Luxury | — | Reference |
| RNB | C, WHF, M WHEEL FRT, 24.5 X 8.25, 10 HOLE, 285.75MM BC, PILOTED HUB, ALUMINUM (ACCURIDE 29137) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RNC | P, WHF, M WHEEL FRT, 20 X 7.5, 10 STUD, 11.25 BC, BS, 5 DEG (ACCURIDE 27945) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RND | P, WHR, M WHEEL RR, 20 X 7.5, 10 STUD, 11.25 BC, BS, 5 DEG (ACCURIDE 27945) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RNE | P, WHF, M WHEEL FRT, 22.5 X 8.25, 10 HOLE, 285.75MM BC PILOTED HUB, ALUMINUM (ACCURIDE 29105) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RNF | P, WHR, M WHEEL RR, 22.5 X 8.25, 10 HOLE, 285.75MM BC PILOTED HUB, ALUMINUM (ACCURIDE 29105) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| RNH | P, WHF, M WHEEL FRT, 22.5 X 8.25, 10 HOLE, 285.75MM BC PILOTED HUB, ALUMINUM (AKW RA29555) this code has more than one documented meaning — filter by year | 1999 | 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.