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 201–300 of 746 codes beginning with C. One meaning shown per code — the best-sourced one we hold. Search above for the rest.

CodeMeaningYearsSourcing
C6B P, GVW, M, GVW RATING, 4,785 LBS 1998 GM sourced
C6C GVWR, 7400 lbs. (3357 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C6D P, GVW, M, GVW RATING, 10,100 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6E P, GVW, M, GVW RATING, 9,400 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6F P, GVW, M, GVW RATING, 5,150 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6G GVWR, 7600 lbs. (3447 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C6H P, GVW, M, GVW RATING, 4,350 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6I P, GVW, M, GVW RATING, 4,850 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6J P, GVW, M, GVW RATING, 5,100 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6K P, GVW, M, GVW RATING, 20,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6L P, GVW, M, GVW RATING, 20,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6M P, GVW, M, GVW RATING, 5,950 LBS/2,700 KG this code has more than one documented meaning — filter by year 1999 GM sourced
C6N P, GVW, M, GVW RATING, 8,200 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6P P, GVW, M, GVW RATING, 8,600 LBS/3,900 KG this code has more than one documented meaning — filter by year 1998 GM sourced
C6Q P, GVW, M, GVW RATING, 6,875 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6R P, GVW, M, GVW RATING, 7,720 LBS/3,500 KG 1998 GM sourced
C6S P, GVW, M, GVW RATING, 8,900 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6T P, GVW, M, GVW RATING, 23,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6U P, GVW, M, GVW RATING, 9,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6V P, GVW, M, GVW RATING, 26,000 LBS (11,793 KG), 1207 — GM sourced
C6W P, GVW, M, GVW RATING, 9,200 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6X P, GVW, M, GVW RATING, 5,037 LBS 1999 GM sourced
C6Y P, GVW, M, GVW RATING, 9,600 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C6Z Lamp Tail, Hella Version — Reference
C70 P, HTR, M, HVAC SYSTEM, AIR CONDITIONER HANG-ON this code has more than one documented meaning — filter by year 1988 GM sourced
C71 P, LAMP, INTR, FRT DR, COURTESY 1984 GM sourced
C72 P, LAMP, INTR, ROOF, SINGLE READING this code has more than one documented meaning — filter by year 1999 GM sourced
C73 P, LAMP, TAIL, DARK LENS 1999 Provisional
C74 P, LAMP, INTR, ROOF, DUAL READING 1995 GM sourced
C75 P, LAMP, INTR, FRT HEADER, COURTESY & DUAL READING 1998 GM sourced
C76 P, LAMP, INTR, QTR, COURTESY & DUAL READING 1999 Provisional
C77 Lamp,interior,front Headliner Courtesy — Reference
C78 P, LAMP, INTR, ROOF, RR, COURTESY & SINGLE READING, 809 E, 5 — GM sourced
C79 P, LAMP, INTR, ROOF RAIL, COURTESY & SINGLE READING 1998 GM sourced
C7A Lowered GVWR, 10,000 lbs. (4536 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C7B Hvac System Air Conditioner Frt, Htr Core Not Req'd, Fan Speed Only — Reference
C7C P, GVW, M, GVW RATING, 10,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7D P, GVW, M, GVW RATING, 7500 KG, 209 E, 8 — Provisional
C7E GVWR, 11,000 lbs. (4990 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C7F P, GVW, M, GVW RATING, 14,050 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7G GVWR, 10,500 lbs. (4763 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C7H P, GVW, M, GVW RATING, 6,400 LBS/2,900 KG this code has more than one documented meaning — filter by year 1999 GM sourced
C7I P, GVW, M, GVW RATING, 6,450 LBS/2,925 KG this code has more than one documented meaning — filter by year 1998 GM sourced
C7J P, GVW, M, GVW RATING, 11,800 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7K P, GVW, M, GVW RATING, 6,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7L P, GVW, M, GVW RATING, 12,000 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7M P, GVW, M, GVW RATING, 14,100 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7N P, GVW, M, GVW RATING, 12,300 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7P P, GVW, M, GVW RATING, 16,000 LBS 1998 GM sourced
C7Q P, GVW, M, GVW RATING, 10,200 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7R P, GVW, M, GVW RATING, 16,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7S P, GVW, M, GVW RATING, 14,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7T P, GVW, M, GVW RATING, 22,500 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7U P, GVW, M, GVW RATING, 11,266 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7V GVWR, 11,600 lbs. (5262 kg) this code has more than one documented meaning — filter by year 2026 GM sourced
C7W P, GVW, M, GVW RATING, 11,400 LBS this code has more than one documented meaning — filter by year 1999 GM sourced
C7X P, GVW, M, GVW RATING, 5,850 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7Y P, GVW, M, GVW RATING, 4,700 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C7Z P, GVW, M, GVW RATING, 4,537 LBS this code has more than one documented meaning — filter by year 1998 GM sourced
C80 P, SWITCH, DIRECTIONAL SIGNAL, WIPER, REVERSE MOUNT, STRG WHL, 127 E, 0 this code has more than one documented meaning — filter by year — GM sourced
C81 P, SWITCH, JAMB, RR DR this code has more than one documented meaning — filter by year 1984 GM sourced
C82 P, SWITCH, TRANSMISSION SHIFT, DRIVER SELECTABLE 1994 Provisional
C83 P, SWITCH, SAFETY, ENGINE STARTING 1995 Provisional
C84 P, LAMP, TAIL & STOP, DARK LENS 1998 GM sourced
C85 P, LAMP, FOG, SUPPRESS WHEN HEADLAMPS ON this code has more than one documented meaning — filter by year 1996 GM sourced
C86 P, LAMP, M/TRNS, SHFT IND, TELL-TALE, SUPPRESSION 1997 GM sourced
C87 P, LAMP, INTR, QTR, COURTESY 1987 GM sourced
C88 P, SWITCH, INFL RST I/P MDL MAN SUPPRESSION----DELETE 1999 GM sourced
C89 P, LAMP, INTR, QTR, SINGLE READING 1987 GM sourced
C8A C, SEA, R, SEO COMPONENT 1, SILVER/BLUE, 20408 E, 8 — Provisional
C8B C, SEA, R, SEO COMPONENT 1, PURPLE, 20408 E, 8 — GM sourced
C8C C, SEB, R, SEO COMPONENT 2, WHITE 1989 Provisional
C8D C, SEA, R, SEO COMPONENT 1, GUNMETAL 1989 Provisional
C8E C, SEB, R, SEO COMPONENT 2, BLACK 1989 Provisional
C8F C, SEB, R, SEO COMPONENT 2, GUNMETAL 1989 Provisional
C8G C, SEC, R, SEO COMPONENT 3, WHITE 1989 Provisional
C8H C, SEC, R, SEO COMPONENT 3, BLACK 1989 Provisional
C8I C, SEC, R, SEO COMPONENT 3, GUNMETAL 1989 Provisional
C8J C, SEC, R, SEO COMPONENT 3, ULTRA BLUE 1989 Provisional
C8K P, GVW, M, GVW RATING, 2675 KG, 20823 E, 4 — GM sourced
C8L C, SEA, R, SEO COMPONENT 1, WHITE 1989 Provisional
C8M C, SEA, R, SEO COMPONENT 1, BLACK 1989 Provisional
C8N C, SEA, R, SEO COMPONENT 1, ULTRA BLUE 1989 Provisional
C8P C, SEB, R, SEO COMPONENT 2, ULTRA BLUE 1989 Provisional
C8T P, LAMP, TAIL, CLEAR LENS, 20729 this code has more than one documented meaning — filter by year — GM sourced
C8V P, GVW, M, GVW RATING, 21,500 LBS, 21003 — GM sourced
C8Y Lamp Tail, Dark Lens, Chrome I/s, Ece — Reference
C8Z Lamp Tail, Dark Lens, Chrome I/s, Sae — Reference
C90 P, LAMP, INTR, FRT & RR DRS, COURTESY this code has more than one documented meaning — filter by year 1998 GM sourced
C91 P, LAMP, INTR, ROOF, COURTESY this code has more than one documented meaning — filter by year 1984 GM sourced
C92 P, MODULE, INFL RST SUPPRESSION -- DELETE this code has more than one documented meaning — filter by year 1999 GM sourced
C93 P, LAMP, INTR, AMBIENT, 10525 this code has more than one documented meaning — filter by year — GM sourced
C94 P, LAMP, DOME, DELAYED this code has more than one documented meaning — filter by year 1983 GM sourced
C95 P, LAMP, INTR, ROOF, COURTESY & DUAL READING 1998 Provisional
C96 P, LAMP, INTR, QTR, COURTESY & SINGLE READING 1998 GM sourced
C97 P, LAMP, INTR, ILLUMINATED ENTRY this code has more than one documented meaning — filter by year 1998 GM sourced
C98 P, MODULE, INFL RST SUPPRESSION this code has more than one documented meaning — filter by year 1998 GM sourced
C99 P, SWITCH, INFL RST I/P MDL MAN SUPPRESSION this code has more than one documented meaning — filter by year 1996 GM sourced
C9A P, PAINT SPECIAL, (WHITE) 1989 GM sourced
C9B Lamp Intr, Ambient, Door — 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.

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