GM RPO Code Database

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Search the code list

24,366
codes on file
51,776
documented meanings
1973–2026
model years

Type a code, or describe the option in words. Every entry says where the meaning came from and which years we hold it for, because an RPO code can mean different things in different eras and a list that hides that is worse than no list.

CodeMeaningYearsSourcing
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 671 codes beginning with S. One meaning shown per code — the best-sourced one we hold. Search above for the rest.

CodeMeaningYearsSourcing
S3F P, TTR, R TIRE TREAD REAR, OFF ROAD ROLLING 1986 GM sourced
S3G P, TTR, R TIRE TREAD REAR, ON/OFF ROAD MUD & SNOW this code has more than one documented meaning — filter by year 1986 GM sourced
S3H P, TTR, R TIRE TREAD REAR, HIGHWAY TRACTION this code has more than one documented meaning — filter by year 1986 GM sourced
S3I GMC Illuminated puddle lamp emblem (LPO dealer-installed accessory) 2026 GM sourced
S3J P, TTR, R TIRE TREAD REAR, HIGHWAY TRACTION BLOCK 1986 GM sourced
S3K P, TTR, R TIRE TREAD REAR, ON/OFF ROAD RIB this code has more than one documented meaning — filter by year 1986 GM sourced
S3L P, TTR, R TIRE TREAD REAR, OFF ROAD TRACTION this code has more than one documented meaning — filter by year 1986 GM sourced
S3M P, TTR, R TIRE TREAD REAR, ALL SEASON (ALS) 1989 GM sourced
S3N P, TTR, R TIRE TREAD REAR, PREMIUM HIGHWAY IMPROVED STEERING CONTROL 1993 GM sourced
S3P C, TTR, R TIRE TREAD REAR, HIGHWAY TRACTION-DIRECTIONAL 1992 GM sourced
S3Q P, TTR, R TIRE TREAD REAR, FUEL EFFICIENT 1992 GM sourced
S3R P, TTR, R TIRE TREAD REAR, HIGHWAY TRACTION-HIGH CENTER OF GRAVITY 1997 GM sourced
S3S P, TTR, R TIRE TREAD REAR, HIGHWAY RIB-XRV this code has more than one documented meaning — filter by year 1997 GM sourced
S3T P, TTR, R TIRE TREAD REAR, ON/OFF ROAD TRACTION-DIRECTIONAL 1999 GM sourced
S3U FOG LAMPS - Front mounted, LED 2022 GM sourced
S3V Accessory Lamps, Brush Guard Mounted — Reference
S3W Accessory Lamps, Front Grille Mounted, Off-road — Reference
S3X Accessory Lamps, Front Roof Mounted, Off-road — Reference
S3Y Accessory Lamps, Roof Marker — Reference
S3Z Accessory Liner, Deck Lid — Reference
S40 Accessory Liner - Trunk/cargo Area — Reference
S41 Rear wheelhouse liners (LPO dealer-installed accessory) 2026 GM sourced
S42 Accessory Load Stops - Utility Rack — Reference
S43 Accessory Lock Control Kit, Power Door — Reference
S45 Accessory Lug Nut And Wheel Lock Kit — Reference
S46 Accessory Lug Nut Cap — Reference
S47 Chrome lug nuts (LPO dealer-installed accessory) 2025 GM sourced
S49 Accessory Luggage Rack, Roof Mounted — Reference
S4A P, TBV, R TIRE BRAND REAR, GOODYEAR 1990 GM sourced
S4B P, TBV, R TIRE BRAND REAR, UNIROYAL 1986 GM sourced
S4C Wheel, 18 inch aluminum spare AEV 2026 GM sourced
S4D Wheel, 18 inch 12-spoke High Gloss Black aluminum full size spare wheel with laser etching 2026 GM sourced
S4G P, TBV, R TIRE BRAND REAR, FIRESTONE 1986 GM sourced
S4H P, TBV, R TIRE BRAND REAR, GENERAL 1986 GM sourced
S4K Utility Wall Strap Kit (LPO dealer-installed accessory) 2026 GM sourced
S4L P, TBV, R TIRE BRAND REAR, MICHELIN 1986 GM sourced
S4M P, TBV, R TIRE BRAND REAR, SUPER TIRE ENGINEERING 1986 GM sourced
S4N P, TBV, R TIRE BRAND REAR, BRIDGESTONE 1986 GM sourced
S4P Wheel Spare 17 X 8.0, J, Aluminum, Design 1 — Reference
S4Q Wheel 20 X 7.5, J, Aluminum, Design 2 — Reference
S4R P, TSR, R TIRE SELECT REAR, BRAND PLANT 1990 GM sourced
S4S P, TBV, R TIRE BRAND REAR, SEMPERIT 1988 GM sourced
S4T P, TBV, R TIRE BRAND REAR, YOKOHOMA 1990 GM sourced
S4U Accessory Sun Shades - Rear And Rear Side Windows — Reference
S4W Dark wheel locks and lug nut kit (LPO dealer-installed accessory) 2026 GM sourced
S4X Black mirror caps (LPO dealer-installed accessory) 2026 GM sourced
S4Y Accessory Mirror Kit, Outside Power — Reference
S4Z Accessory Mirrors, Trailer Extension — Reference
S50 Accessory Molded Hood Protector, Chrome — Reference
S51 Accessory Molded Hood Protector, Painted — Reference
S52 Accessory Molded Hood Protector, Smoked — Reference
S53 Accessory Molding - Upper Accent — Reference
S54 Accessory Navigation Disk Upgrade — Reference
S55 Accessory Floor Mats - All Weather - Alt Design — Reference
S5A P, DIRECT SALES, STRASBOURG 1992 GM sourced
S5B P, DIRECT SALES, FLINT POWERTRAIN 1992 GM sourced
S5C P, DIRECT SALES, OPEL 1992 GM sourced
S5D P, DIRECT SALES, ROLLS ROYCE 1992 GM sourced
S5E P, DIRECT SALES, VENEZUELA 1992 GM sourced
S5F P, DIRECT SALES, ISUZU this code has more than one documented meaning — filter by year 1992 GM sourced
S5G P, DIRECT SALES, JAGUAR 1992 GM sourced
S5H P, DIRECT SALES, DAEWOO 1992 GM sourced
S5I P, DIRECT SALES, BRAZIL 1992 GM sourced
S5J P, DIRECT SALES, MEXICO 1992 GM sourced
S5K P, BOX, WORKSHOP, BASIC KIT 1999 Provisional
S5L P, BOX, WORKSHOP, ADVANCED KIT 1999 Provisional
S5M C, LINING, PEGBOARD 1999 Provisional
S5N P, FIN, R, FLEET INCENTIVE, AUTO WHOLESALE/CAR QUEST (TRK ST), 20508 — Provisional
S5Q Accessory Navigation System, Portable — Reference
S5R Accessory Nudge Bar - Molded Styled — Reference
S5S Accessory Nudge Bar, Tubular — Reference
S5U Accessory Organizer, Cd-dvd Holder, Visor Mounted — Reference
S5W Accessory Organizer Panel, Seat Back — Reference
S5X Accessory Park Assist, Rear — Reference
S5Y Accessory Wheel - 21' Aluminum, Design 4 — Reference
S5Z Wheel Spare 17 X 4.5, T, Aluminum, Design 1 — Reference
S6A P, DIRECT SALES, A.O. SMITH this code has more than one documented meaning — filter by year 1989 GM sourced
S6B P, DIRECT SALES, MISH-MAH-CU- PKG this code has more than one documented meaning — filter by year 1989 GM sourced
S6C P, DIRECT SALES, METALSA 1989 GM sourced
S6D P, DIRECT SALES, FISHER PLANT this code has more than one documented meaning — filter by year 1989 GM sourced
S6E P, DIRECT SALES, GM HOLDEN 1997 GM sourced
S6F P, DIRECT SALES, CANADA this code has more than one documented meaning — filter by year 1989 GM sourced
S6G P, DIRECT SALES, GM HOLDENS G.T.O., 20515 — Provisional
S6H P, DIRECT SALES, VIXEN this code has more than one documented meaning — filter by year 1989 GM sourced
S6I P, DIRECT SALES, CPC PARMA 1989 GM sourced
S6J P, DIRECT SALES, NAVISTAR COLUMBUS PLASTIC this code has more than one documented meaning — filter by year 1989 GM sourced
S6K P, DIRECT SALES, TRANSPLASTICS this code has more than one documented meaning — filter by year 1989 GM sourced
S6L Sport Step, Black (LPO dealer-installed accessory) this code has more than one documented meaning — filter by year 2026 GM sourced
S6M P, DIRECT SALES, BUICK MOTOR DIVISION this code has more than one documented meaning — filter by year 1989 GM sourced
S6N TRAILER HITCH INSERT - Black rubber square this code has more than one documented meaning — filter by year 2020 GM sourced
S6P P, DIRECT SALES, CPC PONTIAC this code has more than one documented meaning — filter by year 1989 GM sourced
S6Q P, DIRECT SALES, BOC LANSING this code has more than one documented meaning — filter by year 1989 GM sourced
S6R P, DIRECT SALES, SERVICE PARTS ORGANIZATION 1989 GM sourced
S6S P, DIRECT SALES, CPC this code has more than one documented meaning — filter by year 1989 GM sourced
S6T P, DIRECT SALES, GM TRUCK & BUS 1989 GM sourced
S6U P, DIRECT SALES, SOUTHAVEN RUBBER 1993 GM sourced
S6V P, DIRECT SALES, REAL - TOOL, INC this code has more than one documented meaning — filter by year 1998 GM sourced
S6W P, DIRECT SALES, PROTOTYPE AUTOMOTIVE SERVICES 1989 GM sourced
S6X P, DIRECT SALES, SATURN 1989 GM sourced
S6Y P, DIRECT SALES, AMERICAN EAGLE MARINE this code has more than one documented meaning — filter by year 1990 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.

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