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| 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 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 |
|---|---|---|---|
| SDO | Accessory Warmer/cooler Package, Food And Beverage | — | Reference |
| SDQ | Accessory Weather Deflectors, Side Window, Painted | — | Reference |
| SDS | Accessory Weather Deflectors, Side Window, Smoked | — | Reference |
| SDT | Hitch holder attachment (LPO dealer-installed accessory) | 2026 | GM sourced |
| SDU | Accessory Weather Deflectors, Sunroof, Smoked | — | Reference |
| SDV | Accessory Wheel, 15', Alloy, Design 1 | — | Reference |
| SDW | Accessory Wheel - 15' - Aluminum - Design 1 | — | Reference |
| SDX | Accessory Wheel, 16', Aluminum, Design 1 | — | Reference |
| SDZ | Accessory Wheel - 17' - Alloy - Design 1 | — | Reference |
| SE0 | Accessory Wheel, 17', Aluminum, Design 1 | — | Reference |
| SE1 | Accessory Wheel, 17', Aluminum, Design 2 | — | Reference |
| SE2 | Accessory Wheel, 17', Aluminum, Design 3 | — | Reference |
| SE3 | Accessory Wheel, 17', Aluminum, Design 4 | — | Reference |
| SE4 | Accessory Wheel, 18', Aluminum, Design 1 | — | Reference |
| SE5 | Accessory Wheel, 18', Aluminum, Design 2 | — | Reference |
| SE6 | Accessory Wheel, 18', Aluminum, Design 3 | — | Reference |
| SE7 | Accessory Wheel, 18', Aluminum, Design 4 | — | Reference |
| SE8 | Accessory Wheel, 18', Aluminum, Design 5 | — | Reference |
| SEA | Family Code, (seo) Component 1 | 1998 | GM dated |
| SEB | Family Code, (seo) Component 2 | 1998 | GM dated |
| SEC | Family Code, (seo) Component 3 | 1998 | GM dated |
| SED | Accessory Wheel, 19', Aluminum, Design 1 | — | Reference |
| SEF | Accessory Wheel, 19', Aluminum, Design 2 | — | Reference |
| SEH | Accessory Wheel, 20', Aluminum, Design 1 | — | Reference |
| SEJ | Accessory Wheel - 20' - Aluminum - Design 2 | — | Reference |
| SEK | Accessory Wheel - 20' - Aluminum - Design 3 | — | Reference |
| SEL | Accessory Wheel - 20' - Aluminum - Design 4 | — | Reference |
| SEM | Accessory Wheel - 20' - Aluminum - Design 5 | — | Reference |
| SEO | Accessory Wheel, 20', Aluminum, Design 6 | — | Reference |
| SEP | Accessory Wheel - 21' - Aluminum - Design 1 | — | Reference |
| SEQ | Accessory Wheel - 21' - Aluminum - Design 2 | — | Reference |
| SER | Accessory Wheel, 21', Aluminum, Design 3 | — | Reference |
| SES | Accessory Wheel - 22 X 9.0 - J - Aluminum - Design 1 | — | Reference |
| SET | 22 inch 12-Spoke Chrome alloy wheels (LPO dealer-installed accessory) | 2026 | GM sourced |
| SEU | LPO 22 inch Polished aluminum (LPO dealer-installed accessory) | 2026 | GM sourced |
| SEV | 22 inch 6-spoke Low Gloss Black wheels with machined accents (LPO dealer-installed accessory) | 2026 | GM sourced |
| SEW | 22 inch 5-Spoke Dark Silver Aluminum Wheel (LPO dealer-installed accessory) | 2019 | Reference |
| SEY | Accessory Wheel - 22 X 9.0 - J - Aluminum - Design 5 | — | Reference |
| SEZ | 22 inch Carbon flash metallic wheels (LPO dealer-installed accessory) | 2026 | GM sourced |
| SF0 | 22 inch 6-spoke premium Bright Silver machined wheels (LPO dealer-installed accessory) | 2019 | Reference |
| SF1 | 22 inch Bright Chrome wheels (LPO dealer-installed accessory) | 2025 | GM sourced |
| SF2 | 22 inch Multi-spoke Chrome wheels (LPO dealer-installed accessory) | 2025 | GM sourced |
| SF3 | Accessory Wheel Covers, Chrome | — | Reference |
| SF4 | Accessory Wheel Covers - Alternate Design 1 | — | Reference |
| SF6 | Body color wheel arch moldings (LPO dealer-installed accessory) | 2026 | GM sourced |
| SF8 | Accessory Decal Package - Design 3 | — | Reference |
| SF9 | Accessory Decal Package - Design 4 | — | Reference |
| SFA | Accessory Decal Package - Design 5 | — | Reference |
| SFC | Accessory Decal Package - Design 6 | — | Reference |
| SFD | Accessory Decal Package - Design 7 | — | Reference |
| SFE | WHEEL LOCKS | 2026 | GM sourced |
| SFF | Accessory Divider Bar - Flexible Organizer, RR Compt | — | Reference |
| SFG | Family Code, Gear | 1988 | GM dated |
| SFI | Accessory Window Control Kit, Power | — | Reference |
| SFJ | Reflective Window Shade (LPO dealer-installed accessory) | 2026 | GM sourced |
| SFK | Accessory Winter Wheel Package - 14' - Steel | — | Reference |
| SFL | Accessory Winter Wheel Package - 15' - Steel | — | Reference |
| SFM | Accessory Winter Wheel Package - 15' - Aluminum | — | Reference |
| SFN | Accessory Winter Wheel Package - 16' - Aluminum | — | Reference |
| SFO | Accessory Winter Wheel Package, 16' Steel | — | Reference |
| SFP | Accessory Winter Wheel Package, 17' Aluminum | — | Reference |
| SFQ | Accessory Winter Wheel Package - 18' - Aluminum - Design 1 | — | Reference |
| SFR | Accessory XM Radio | — | Reference |
| SFS | Accessory Sun Shades - Rear Window | — | Reference |
| SFT | FAMILY CODE, SPOILER, FRT, 822 | — | Provisional |
| SFU | 22 inch Bright split-spoke wheels (LPO dealer-installed accessory) | 2026 | GM sourced |
| SFV | Accessory Wireless Network Interface Module | — | Reference |
| SFW | REAR BACKUP ALARM CALIBRATION - Allows installation of an aftermarket back-up alarm | 2026 | GM sourced |
| SFY | Accessory Cargo Area Load Floor - Sliding | — | Reference |
| SFZ | Black GMC emblems (LPO dealer-installed accessory) | 2026 | GM sourced |
| SG3 | Accessory Springs - Sport Suspension | — | Reference |
| SG4 | Accessory Wheel - 18/19' Alloy, Design 4 | — | Reference |
| SG7 | Accessory Power Steering Package | — | Reference |
| SG8 | Wheel Spare 18 X 8.0, J, Steel, Design 1 | — | Reference |
| SG9 | Tire Spare P245/70r17 SL 108t BW Als | — | Reference |
| SGA | P, WHEEL ADDITIONAL, RR, SPARE this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| SGB | P, FORM, ADVANCED BROADCAST DOCUMENT | 1995 | GM sourced |
| SGC | C, EQUIPMENT, SPRING SPACER PACK (WHEELCHAIR SPECIAL) this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| SGE | Wheel 18 X 7.5, J, Aluminum, Design 8 | — | Reference |
| SGF | Wheels, 22 inch x 9 inch | 2026 | GM sourced |
| SGG | Wheels, 22 inch 10-Spoke alloy, Polished with Dark Android finish and Laser Etching | 2026 | GM sourced |
| SGH | P, PLT, R PLANT CODE, SZENTGOTTHARD, HUNGARY | 1995 | Provisional |
| SGI | Accessory Sill Plates - Aluminium | — | Reference |
| SGJ | P, PLT, R PLANT CODE, ESZTERGOM, HUNGARY | 1998 | Provisional |
| SGM | 22 inch High Gloss Black wheels (LPO dealer-installed accessory) | 2026 | GM sourced |
| SGQ | Accessory Differential - Mechanical Full Locking - RR Axle | — | Reference |
| SGR | Family Code, Merchandised Pkg | 1988 | GM dated |
| SGS | Family Code, (seo) Vehicle | 1998 | GM dated |
| SGT | Calibration Speed Limiting (130mph) | — | Reference |
| SGU | Accessory Wheel - 19 X 8.5 - J - Aluminum - Design 1 | — | Reference |
| SGV | Accessory Wheel - 19 X 8.0 - J - Aluminum - Design 1 | — | Reference |
| SGW | Accessory Wheel - 19 X 9.0-j-frt & 19 X 9.5-j-rr-aluminum | — | Reference |
| SGX | Accessory Wheel - 19 X 9.0-j-frt & 19 X 10.0-j-rr-aluminum | — | Reference |
| SGY | Accessory Remote Start - Two Way Advanced - W/ Smartphone Connectivity | — | Reference |
| SGZ | Accessory Wheel - 19 X 8.5 - J - Aluminum - Design 2 | — | Reference |
| SH0 | Wheels, 22 inch x 9 inch | 2026 | GM sourced |
| SH1 | Accessory Armrest - Design 2 | — | Reference |
| SH2 | Accessory Armrest - Design 3 | — | Reference |
| SH4 | Accessory Illuminated Cupholders And Foot Wells | — | Reference |
| SH5 | Accessory Charge Cord Set - 220/230v W/ Euro Plug Type 3 | — | 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.