GM RPO Code Database

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By FullSizeChevy.com Updated

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

CodeMeaningYearsSourcing
C3C P, GVW, M, GVW RATING, 2600 KG, 10208 E, 1 — GM sourced
C3D P, GVW, M, GVW RATING, 14,800 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3E P, GVW, M, GVW RATING, 5,126 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3F GVWR, 7700 lbs. (3493 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C3G P, GVW, M, GVW RATING, 4,450 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3H P, GVW, M, GVW RATING, 5,300 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3J GVWR, 6700 lbs. (3039 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C3K P, GVW, M, GVW RATING, 5,137 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3L P, GVW, M, GVW RATING, 5,357 LBS/2,430 KG, 20206 E, 1 — GM sourced
C3M P, GVW, M, GVW RATING, 5,170 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3N P, GVW, M, GVW RATING, 6,175 LBS/2,800 KG 1998 GM sourced
C3O Decal Stripe, Black — Reference
C3P P, GVW, M, GVW RATING, 4,500 LBS 1998 GM sourced
C3Q Sill plates, bright 2026 GM sourced
C3R P, GVW, M, GVW RATING, 7,800 LBS 1999 GM sourced
C3S P, GVW, M, GVW RATING, 6,835 LBS/3,100 KG 1998 Provisional
C3T P, GVW, M, GVW RATING, 5,350 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C3U Sunroof, power 2026 GM sourced
C3V Ornamentation Intr, Door Trim Middle, Leather — Reference
C3W P, GVW, M, GVW RATING, 2430 KG, 829 E 1 — Provisional
C3X P, GVW, M, GVW RATING, 2470 KG, 829 E 1 — Provisional
C3Y P, RDC, R, ROOF, SUN, GLASS, SLIDING, PANELS, ELEC, 10828 E 1 — GM sourced
C3Z Defogger RR Window, Electric, W/o Timer — Reference
C40 P, HTR, M, HVAC SYSTEM, HEATER, OUTSIDE AIR, WITH FAN, ELECTRONIC CONT this code has more than one documented meaning — filter by year 1997 GM sourced
C41 P, HTR, M, HVAC SYSTEM, HEATER, OUTSIDE AIR, WITH FAN this code has more than one documented meaning — filter by year 1997 GM sourced
C42 P, HTR, M, HVAC SYSTEM, HEATER, OUTSIDE AIR, DELUXE this code has more than one documented meaning — filter by year 1997 GM sourced
C43 P, DEFLECTOR, AIR this code has more than one documented meaning — filter by year 1992 GM sourced
C44 P, DEFLECTOR, AIR, INTERIOR 1997 GM sourced
C45 P, DEF, R, DEFOGGER, WINDOW, RR S/D 1990 Provisional
C46 P, HTR, M, HVAC SYSTEM, HEATER, HIGH CAPACITY this code has more than one documented meaning — filter by year 1996 GM sourced
C47 P, DEF, R, DEFOGGER, RR WINDOW - DELETE this code has more than one documented meaning — filter by year 1998 GM sourced
C48 P, HEATER, RADIATOR, COOLANT this code has more than one documented meaning — filter by year 1997 GM sourced
C49 rear-window defogger 2026 GM sourced
C4A P, SGR, R, MERCHANDISED PKG, SAVER 1 1998 Provisional
C4B P, PERFORMANCE PACKAGE, ENGINE UPGRADE 1999 GM sourced
C4C P, PANEL, TRIM, RR SIDE - NOT INSTALLED, 112 E 0 — Provisional
C4D P, GVW, M, GVW RATING, 5,550 LBS, 1010 — Provisional
C4E P, CTY, R, COUNTRY, EUROPE this code has more than one documented meaning — filter by year 1999 GM sourced
C4F P, GVW, M, GVW RATING, 5,900 LBS, 10404 — Provisional
C4G P, GVW, M, GVW RATING, 4,935 LBS 1998 GM sourced
C4H P, GVW, M, GVW RATING, 5,050 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C4I P, GVW, M, GVW RATING, 22,000 LB (9979 KG), 1207 — GM sourced
C4J P, GVW, M, GVW RATING, 4,950 LBS 1998 GM sourced
C4K P, GVW, M, GVW RATING, 5,247 LBS, 10927 this code has more than one documented meaning — filter by year — GM sourced
C4L P, GVW, M, GVW RATING, 5,645 LBS (2,560 KG), 20118 — Provisional
C4M GVWR, 9900 lbs. (4490 kg) 2019 Reference
C4O GVW Rating 2395 KG — Reference
C4P Air conditioning, single-zone manual 2022 Provisional
C4Q GVW Rating 2300 KG (5070 Lbs) — Reference
C4R GVW Rating 6,008 Lbs — Reference
C4V Fleet Incentive Taro Pharmaceuticals Usa, Inc. (u/w-trk Ckgmlst) this code has more than one documented meaning — filter by year — Reference
C4X GVW Rating 2320 KG (5115 Lbs) — Reference
C4Z P, SGR, R, MERCHANDISED PKG, SAVER DISCOUNT 1998 Provisional
C50 P, DEFROSTER, HEATED, WINDSHIELD 1986 GM sourced
C51 P, DEFLECTOR, RR WINDOW, AIR this code has more than one documented meaning — filter by year 1984 GM sourced
C52 P, DEFLECTOR, WATER, S/D 1992 GM sourced
C53 P, VENTILATION SYSTEM, OUTSIDE AIR, WITH FAN, ENGINE OFF 1998 Provisional
C54 P, RDC, R, ROOF, HATCH, NON-REMOVABLE, VENTILATING 1992 GM sourced
C55 P, VENT, ROOF this code has more than one documented meaning — filter by year 1983 GM sourced
C56 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER FRT, MAN CONTROLS, INCREASED CAPACITY 1998 GM sourced
C57 P, VENT, FORCED AIR this code has more than one documented meaning — filter by year 1983 GM sourced
C58 P, VENT, INST PNL LOCATION 1984 Provisional
C59 Air vents, rear this code has more than one documented meaning — filter by year 2026 GM sourced
C5A P, GVW, M, GVW RATING, 4,900 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5B P, GVW, M, GVW RATING, 15,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5C P, GVW, M, GVW RATING, 5,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5D P, GVW, M, GVW RATING, 4,600 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5E P, GVW, M, GVW RATING, 5,400 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5F P, GVW, M, GVW RATING, 8,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5G P, GVW, M, GVW RATING, 5,600 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5H GVWR, 6900 lbs. (3130 kg) 2026 GM sourced
C5I P, GVW, M, GVW RATING, 8,050 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5J P, GVW, M, GVW RATING, 6,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5K P, GVW, M, GVW RATING, 6,015 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5L P, GVW, M, GVW RATING, 6,061 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5M P, GVW, M, GVW RATING, 6,100 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5N P, GVW, M, GVW RATING, 5,750 LBS this code has more than one documented meaning — filter by year 1999 GM sourced
C5O GVW Rating 2197 KG — Reference
C5P P, GVW, M, GVW RATING, 6,250 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5Q P, GVW, M, GVW RATING, 6,300 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5R P, GVW, M, GVW RATING, 5,800 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5S P, GVW, M, GVW RATING, 6,600 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5T P, GVW, M, GVW RATING, 4,200 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5U GVWR, 6800 lbs. (3084 kg) 2026 GM sourced
C5V P, GVW, M, GVW RATING, 6,850 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5W GVWR, 7000 lbs. (3175 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C5X P, GVW, M, GVW RATING, 4,650 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C5Y GVWR, 7100 lbs. (3221 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C5Z GVWR, 7200 lbs. (3266 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C60 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER FRT, MAN CONTROLS this code has more than one documented meaning — filter by year 1998 GM sourced
C61 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER FRT, AUTO CONTROLS this code has more than one documented meaning — filter by year 1997 GM sourced
C62 P, HVAC PROVISIONS, INCREASED CAPACITY 1996 Provisional
C63 P, HVAC PROVISIONS, A/C REFRIGERANT - DELETE this code has more than one documented meaning — filter by year 1998 GM sourced
C64 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER HANG-ON TYPE 1988 GM sourced
C65 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER FRT, MAN CONTROLS, W/O HTR CORE 1997 GM sourced
C66 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER PROVISION FOR DEALER INSTALLATION this code has more than one documented meaning — filter by year 1998 GM sourced
C67 Air conditioning, single-zone manual 2026 GM sourced
C68 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER FRT, AUTO, ELECTRONIC CONTROLS this code has more than one documented meaning — filter by year 1998 GM sourced
C69 Air conditioning, rear this code has more than one documented meaning — filter by year 2026 GM sourced
C6A GVWR, 7300 lbs. (3311 kg) this code has more than one documented meaning — filter by year 2026 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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