← 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 501–600 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 |
|---|---|---|---|
| SH6 | Accessory Charge Cord Set - 220/230v W/ Euro Plug Type 4 | — | Reference |
| SH9 | Accessory Wheel - 20 X 8.0 - J - Aluminum - Design 1 | — | Reference |
| SHA | Accessory Wheel - 20 X 8.0 - J - Aluminum - Design 2 | — | Reference |
| SHC | P, PLT, R PLANT CODE, SHANGHAI, CHINA | 1995 | GM sourced |
| SHD | 22 inch Black Gloss wheels with chrome accents (LPO dealer-installed accessory) | 2019 | Reference |
| SHH | 20 inch high gloss Black aluminum wheels (LPO dealer-installed accessory) | 2026 | GM sourced |
| SHK | Family Code, Shock Absorbers | 1988 | GM dated |
| SHL | Accessory Wheel - 20 X 8.5 - J - Aluminum - Design 2 | — | Reference |
| SHM | Wheel Spare 14 X 4.5, J, Steel, Design 1 | — | Reference |
| SHN | Wheel Spare 14 X 4.0, T, Steel, Design 1 | — | Reference |
| SHQ | Accessory Decal Package - Design 11 | — | Reference |
| SHR | Accessory Decal Package - Design 12 | — | Reference |
| SHT | Stars and Steel Special Edition Graphics (LPO dealer-installed accessory) | 2026 | GM sourced |
| SHU | Accessory Decal Package - Design 15 | — | Reference |
| SHW | Accessory Decal Package - Design 16 | — | Reference |
| SHX | Accessory Tray - Trunk/cargo Area W/divider | — | Reference |
| SHZ | Accessory Display Module - Parking Sensor | — | Reference |
| SIA | Accessory Spoiler Extension - Decklid | — | Reference |
| SID | Accessory Drop Hitch - Bumper Mounted | — | Reference |
| SIE | Accessory Pubx Tiered Storage | — | Reference |
| SIF | Accessory Rse - Portable Media Connectivity Package | — | Reference |
| SIG | Accessory Driveline | — | Reference |
| SII | Wheels, 22 inch x 9 inch polished aluminum | 2026 | GM sourced |
| SIY | Wheels, 22 inch x 9 inch 6-spoke Carbon Flash Metallic aluminum with selective machining | 2026 | GM sourced |
| SJ2 | Wheel Spare 19 X 8.5, J, Aluminum, Design 1 | — | Reference |
| SJ3 | Wheel Spare 19 X 8.5, J, Aluminum, Design 2 | — | Reference |
| SJ5 | Accessory Wheel - 19 X 8.5 - J - Aluminum - Design 5 | — | Reference |
| SJ6 | Accessory Wheel - 19 X 8.5 - J - Aluminum - Design 6 | — | Reference |
| SJ7 | Accessory Wheel - 19 X 8.5 - J - Aluminum - Design 7 | — | Reference |
| SJ8 | Accessory Illumination Package - Interior Ambient | — | Reference |
| SJ9 | Bright Sport mesh grille (LPO dealer-installed accessory) | 2026 | GM sourced |
| SJA | Grille insert with chrome horizontal louver insert (LPO dealer-installed accessory) | 2019 | Reference |
| SJB | Grille, Black mesh with Chrome surround (LPO dealer-installed accessory) | 2026 | GM sourced |
| SJC | P, PLT, R PLANT CODE, SAO JOSE DE CAMPOS, BRAZIL | 1997 | GM sourced |
| SJD | Accessory Molding - Tailgate / Decklid | — | Reference |
| SJG | Accessory Center Cap - Wheel - Design 12 | — | Reference |
| SJI | Accessory Rocker Moldings Alternate Finish 1 | — | Reference |
| SJK | Accessory Wheel - 17 X 7.0 - J - Aluminum - Design 3 | — | Reference |
| SJM | Wheel Spare 18 X 8.0, J, Aluminum, Design 6 | — | Reference |
| SJS | Front Bed Utility Wall Package (LPO dealer-installed accessory) | 2026 | GM sourced |
| SJT | Accessory Decal Package - Interior - Design 3 | — | Reference |
| SJU | Accessory Stripe Package Fender - White | — | Reference |
| SJV | Accessory Stripe Package Fender - Gray | — | Reference |
| SJW | Accessory Stripe Package Fender - Black | — | Reference |
| SJX | Accessory Wheel - 20 X 10 - J - FRT & 20 X 11 - J - RR - Aluminum - D | — | Reference |
| SJZ | Accessory Cargo Net - Seat Cushion | — | Reference |
| SK3 | Dealer calibration to change codes at time of sale | 2022 | GM sourced |
| SK5 | Service calibration to disable Front Park Assist | 2022 | GM sourced |
| SKB | Wheel 20 X 8.0, J, Aluminum, Design 3 | — | Reference |
| SKD | P, VEHICLE, SEMI-KNOCKED DOWN this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| SKL | Wheel 20 X 8.0, J, Aluminum, Design 4 | — | Reference |
| SKP | Sales Package Skid Plate, 'off Road' Spot, (seo) this code has more than one documented meaning — filter by year | — | Reference |
| SKS | Wheel 15 X 6.5, J, Steel, Design 4 | — | Reference |
| SKX | 20 inch Aluminum high gloss Black with machined finish wheels (LPO dealer-installed accessory) | 2026 | GM sourced |
| SLA | P, PLT, R PLANT CODE, SHREVEPORT, LA, USA this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| SLF | Floor Sliding, Load | — | Reference |
| SLL | P, SPC, R SALES PROCESSING, SOLD ORDERS, 10209 | — | GM sourced |
| SLM | P, SPC, R SALES PROCESSING, STOCK ORDERS, 10209 | — | GM sourced |
| SLN | Accessory Strut Tower Brace | — | Reference |
| SLT | P, EQUIPMENT, CHEVROLET 'LT' SALES PKG this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| SLU | Equipment GMC 'slt' Sales Package #2 | — | Reference |
| SM2 | Accessory Badge - Interior Trim, Design 2 | — | Reference |
| SM3 | Accessory Badge - Interior Trim, Design 3 | — | Reference |
| SM4 | Accessory Badge - Interior Trim, Design 4 | — | Reference |
| SM5 | Accessory Badge - Interior Trim, Design 5 | — | Reference |
| SMA | P, SCR, R SPACER, PACK, RH SPRING CAB LEVELING, +10 MM this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| SMB | P, SCR, R SPACER, PACK, RH SPRING CAB LEVELING, + 0 MM this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| SMC | P, SCR, R SPACER, PACK, RH SPRING CAB LEVELING, -10 MM this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| SMD | Wheels, 22 inch 12-Spoke alloy, polished with Dark Android finish this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| SMF | C, SCR, R SPACER, PACK, RH/LH SPRING CAB LEVELING - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| SMI | Wheels, 22 inch x 9 inch ultra-bright machined and painted Midnight Silver | 2026 | GM sourced |
| SMJ | Accessory Tonneau Cover - Insert- Finish 1 | — | Reference |
| SML | Wheels, 22 inch 14-Spoke alloy with Bright Silver finish | 2026 | GM sourced |
| SMM | Wheels, 22 inch 18-Spoke alloy with After Midnight finish | 2026 | GM sourced |
| SMN | Accessory Tonneau Cover - Insert- Finish 2 | — | Reference |
| SMO | Fleet Incentive Bfpe International (w-trk Ckgmlst) | — | Reference |
| SMQ | Accessory Tonneau Cover - Insert- Finish 3 | — | Reference |
| SMR | Wheels, 22 inch 7-spoke ultra-bright machined with bright chrome inserts | 2026 | GM sourced |
| SMU | C, CCU, M PRIMARY COLOR, EXTERIOR, TURQUOISE, ISUZU | 1998 | GM sourced |
| SMV | Accessory Tonneau Cover - Insert- Finish 4 | — | Reference |
| SMW | Accessory Tonneau Cover - Insert- Finish 5 | — | Reference |
| SMX | Accessory Tonneau Cover - Insert- Finish 6 | — | Reference |
| SN3 | Wheel Spare 19 X 8.5, J, Aluminum, Design 3 | — | Reference |
| SNA | Accessory Decal Package - Design 17 | — | Reference |
| SNB | Accessory Decal Package - Design 18 | — | Reference |
| SNC | Accessory Decal Package - Design 19 | — | Reference |
| SNE | Accessory Decal Package - Design 20 | — | Reference |
| SNF | P, WHS, R WHEEL SPARE, FRT this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| SNG | Accessory Decal Package - Design 21 | — | Reference |
| SNH | Accessory Decal Package - Design 22 | — | Reference |
| SNJ | Accessory Decal Package - Design 23 | — | Reference |
| SNK | Accessory Decal Package - Design 24 | — | Reference |
| SNL | C, CCL, R SECONDARY COLOR, EXTERIOR, INCA GOLD, SCHWANS, WE7952 | 1999 | GM sourced |
| SNM | Accessory Decal Package - Design 25 | — | Reference |
| SNO | Hitch Package, Gooseneck ball and chain tiedown kit with case (LPO dealer-installed accessory) | 2026 | GM sourced |
| SNP | Accessory Decal Package - Design 26 | — | Reference |
| SNQ | Accessory Decal Package - Design 27 | — | Reference |
| SNR | Seat, Up-level Rear with Storage Package, 60/40 folding bench this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| SNS | Accessory Decal Package - Design 28 | — | Reference |
| SNT | P, WHS, R WHEEL SPARE, 22.5 X 6 | 1994 | 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.