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 1–100 of 625 codes beginning with L. One meaning shown per code — the best-sourced one we hold. Search above for the rest.

CodeMeaningYearsSourcing
L01 P, ENG, M, ENGINE, GAS, 4 CYL, 1.6L, MFI, OHC 1988 GM sourced
L02 P, ENG, M, ENGINE, DIESEL, 6 CYL, 8.2L, DI, L6, OHC, 129KW, ISUZU, 124 E, 8 — GM sourced
L03 5.0-liter V8 electronic-fuel-injection engine 1990 GM sourced
L04 P, ENG, M, ENGINE, DIESEL, 6 CYL, 8.2L, DI, L6, OHC, 159KW, 1SUZU, 124 E, 8 — GM sourced
L05 5.7-liter V8 electronic-fuel-injection engine 1990 GM sourced
L06 P, ENG, M, ENGINE, GAS, 4 CYL, 2.2L, MFI, SOHC, BRA 1996 GM sourced
L07 P, ENG, M, ENGINE, DIESEL, 4 CYL, 1.9L, L4, RENAULT 1997 Provisional
L08 P, ENG, M, ENGINE, DIESEL, 4 CYL, 1.9L, L4, HO, RENAULT this code has more than one documented meaning — filter by year 1999 GM sourced
L09 P, ENG, M, ENGINE, GAS, 6 CYL, 2.5L, FI this code has more than one documented meaning — filter by year 1999 GM sourced
L0A Engine Gas, 4 Cyl, 2.0l, L4 Nissan — Reference
L10 P, ENG, M, ENGINE, ALCOHOL, 4 CYL, 1.0L, MFI, L4, OHC, BRA 1998 Provisional
L11 P, ENG, M, ENGINE, GAS, 4 CYL, 1.0L, MFI, OHC 1994 GM sourced
L12 P, ENG, M, ENGINE, DIESEL, 8 CYL, 6.5L, DI, OHC, TURBO, GM 1998 GM sourced
L13 P, ENG, M, ENGINE, DIESEL, 6 CYL, 2.5L, CRI, V6, TURBO, DOHC, ISUZU 1998 GM sourced
L14 Engine,4 Cylinder,1.4l,dohc,mpi,gmdtac this code has more than one documented meaning — filter by year — Reference
L15 P, ENG, M, ENGINE, DIESEL, 4 CYL, 4.3L, L4 1996 Provisional
L16 P, ENG, M, ENGINE, GAS, 6 CYL, 2.8L, DI, DOHC, ALUM, GM, 10522 — Provisional
L17 P, ENG, M, ENGINE, GAS, 4 CYL, 1.6L, 2BBL 1984 GM sourced
L18 8.1-liter V8 gasoline engine 2007 GM sourced
L19 7.4-liter V8 electronic-fuel-injection engine 1990 GM sourced
L20 Engine,flexible Fuel,(gas/ethanol E85),8 Cyl,4.8l,sfi Iron, GM — Reference
L21 Engine Gas, 8 Cyl, 7.4l (7.4b), Mfi, Performance — Reference
L22 P, ENG, M, ENGINE, GAS, 6 CYL, 4.1L, 1BBL this code has more than one documented meaning — filter by year 1992 GM sourced
L23 P, ENG, M, ENGINE, DIESEL, 4 CYL, 3.0L, L4, TURBO 1996 Provisional
L24 P, ENG, M, ENGINE, GAS, 4 CYL, 1.9L, MFI, OHC this code has more than one documented meaning — filter by year 1992 GM sourced
L25 P, ENG, M, ENGINE, GAS, 6 CYL, 4.8L, 1BBL 1984 GM sourced
L26 P, ENG, M, ENGINE, GAS, 6 CYL, 3.8L, SFI, V6, GM, 10411 this code has more than one documented meaning — filter by year — GM sourced
L27 P, ENG, M, ENGINE, GAS, 6 CYL, 3.8L, MFI, V6, (3800 SERIES) 1994 GM sourced
L28 P, ENG, M, ENGINE, DIESEL, 6 CYL, 7.1L, MFI 1991 Provisional
L29 Engine,gas,8 Cyl,7.4l,mfi — Reference
L2B Engine Gas, 4 Cyl, 1.5l, Mfi, L4, Dohc, Afm, Vvt, Gen 2 Fam, E85 Max — Reference
L2C Engine Gas, 4 Cyl, 1.5l, Mfi, L4, Dohc, Afm, Gen 2, Fam A /b, 77 Kw, Gmap — Reference
L2D Engine Gas, 4 Cyl, 1.5l,mfi,l4,dohc,afm,rwd,gen 2 Fam,a/b,74.5 Kw,gmap — Reference
L2N Engine Gas, 4 Cyl, 1.4l, Mfi, L4, Dohc, Fam O, 74 KW — Reference
L2W Engine Gas, 4 Cyl, 1.6l, Mfi, L4, Dohc, Fam 1, Gen S200 80 Kw, E20 Max — Reference
L30 P, ENG, M, ENGINE, GAS, 8 CYL, 5.0L, CPI 1991 GM sourced
L31 P, ENG, M, ENGINE, GAS, 8 CYL, 5.7L, CPI this code has more than one documented meaning — filter by year 1991 GM sourced
L32 P, ENG, M, ENGINE, GAS, 6 CYL, 3.8L, SFI, V6, SUPERCHARGED, GM, 10411 this code has more than one documented meaning — filter by year — GM sourced
L33 high-output 5.3-liter aluminum-block V8 gasoline engine 2007 GM sourced
L34 P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, MFI, DOHC this code has more than one documented meaning — filter by year 1990 GM sourced
L35 P, ENG, M, ENGINE, GAS, 6 CYL, 4.3L, CPI, V6, 90 DEG, HO 1992 GM sourced
L36 P, ENG, M, ENGINE, GAS, 6 CYL, 3.8L, MFI, V6, HO (ERV6 SERIES) 1992 GM sourced
L37 P, ENG, M, ENGINE, GAS, 8 CYL, 4.6L, MFI, V8, HO, DOHC 1998 GM sourced
L38 P, ENG, M, ENGINE, GAS, 4 CYL, 2.5L, 1 TBI, HO this code has more than one documented meaning — filter by year 1988 GM sourced
L39 P, ENG, M, ENGINE, GAS, 8 CYL, 4.XL, MFI, V8, DOHC, GM this code has more than one documented meaning — filter by year 1999 GM sourced
L3B Engine, TurboMax 2026 GM sourced
L3C P, ENG, M, ENGINE, GAS, 4 CYL, 1.0L, 1BBL, OHC, SUZUKI 1992 GM sourced
L40 P, ENG, M, ENGINE, DIESEL, 4 CYL, 1.9L, L4, CRI, HO, 1129 E, 0 this code has more than one documented meaning — filter by year — GM sourced
L41 P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, MFI, DOHC, RENAULT 1999 GM sourced
L42 P, ENG, M, ENGINE, FLEXIBLE FUEL, 2.2L, (GAS/CNG), MFI, DOHC, ALUM,, 10820 — GM sourced
L43 P, ENG, M, ENGINE, FLEXIBLE FUEL, (GAS/ALC), 4 CYL, 2.2L, MFI this code has more than one documented meaning — filter by year 1997 GM sourced
L44 P, ENG, M, ENGINE, ALCOHOL, 6 CYL, 4.0L, MFI, L6, DOHC, ALUM, GM this code has more than one documented meaning — filter by year 1999 GM sourced
L45 P, ENG, M, ENGINE, GAS, 4 CYL, 1.0L, MFI, DOHC 1994 Provisional
L46 Engine,3.0l,sfi,v6,60deg,china(export Only)(nao Design) — Reference
L47 P, ENG, M, ENGINE, GAS, 8 CYL, 4.0L, MFI, DOHC 1995 GM sourced
L48 P, ENG, M, ENGINE, GAS, 4 CYL, 1.4L, MFI, SOHC 1998 GM sourced
L49 P, ENG, M, ENGINE, DIESEL, 8 CYL, 6.5L 1989 GM sourced
L4A P, ENG, M, ENGINE, DIESEL, 4 CYL, 4.0L, L4, PERKINS 1996 GM sourced
L4C P, ENG, M, ENGINE, DIESEL, 4 CYL, 3.1L, L4, TURBO, ISUZU 1999 GM sourced
L4D P, ENG, M, ENGINE, DIESEL, 4 CYL, 4.0L, L4, TURBO, PERKINS 1996 GM sourced
L4I P, ENG, M, ENGINE, DIESEL, 4 CYL, 1.3L, L4, DI, DOHC, TURBO-HIGH, 10302 E, 0 — Provisional
L4L P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, DI, ALUM, DOHC, PT-JV, 10621 E, 0 — Provisional
L4M P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, DI, ALUM, DOHC, TURBO-HIGH,PT-JV, 10621 E, 0 — Provisional
L4N P, ENG, M, ENGINE, GAS, 4 CYL, 1.9L, DI, ALUM, DOHC, PT-JV, 10621 E, 0 — Provisional
L4Z P, ENG, M, ENGINE, DIESEL, 4 CYL, 2.5L, L4, TURBO, OHC, 74KW,, INTERCOOLER, ISUZU, 10302 — Provisional
L50 P, ENG, M, ENGINE, DIESEL, 4 CYL, 2.2L, L4, TURBO DI, HO, SOHC, GM 1999 GM sourced
L51 P, ENG, M, ENGINE, DIESEL, 4 CYL, 2.2L, CRI, L4, TURBO DI, DOHC, REN 1999 Provisional
L52 P, ENG, M, ENGINE, GAS, 5 CYL, 3.5L, MFI, L5, ALUM, DOHC, GM this code has more than one documented meaning — filter by year 1998 GM sourced
L53 P, ENG, M, ENGINE, DIESEL, 4 CYL, 1.9L, L4, DI, DOHC, ISUZU 1999 Provisional
L54 P, ENG, M, ENGINE, DIESEL, 4 CYL, 4.6L, DI, L4, ISUZU 1999 GM sourced
L55 P, ENG, M, ENGINE, GAS, 4 CYL, 1.6L, MFI, SOHC 1998 GM sourced
L56 P, ENG, M, ENGINE, DIESEL, 8 CYL, 6.5L, TURBO 1989 GM sourced
L57 P, ENG, M, ENGINE, DIESEL, 8 CYL, 6.5L, HO this code has more than one documented meaning — filter by year 1998 GM sourced
L58 P, ENG, M, ENGINE, DIESEL, 4 CYL, 3.0L, DI, L4, TURBO, DOHC, ISUZU this code has more than one documented meaning — filter by year 1998 GM sourced
L59 5.3-liter flex-fuel V8 engine 2007 GM sourced
L5P Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel compatible 2026 GM sourced
L5Q MOLDING COLOR, MED GRAY MET (91) — Provisional
L60 P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, MFI, ALUM, OHC, OPEL 1998 Provisional
L61 P, ENG, M, ENGINE, GAS, 4 CYL, 2.2L, MFI, ALUM, DOHC 1998 GM sourced
L62 Engine,368 C.i.d.(368-9),v8 — Reference
L63 P, ENG, M, ENGINE, GAS, 6 CYL, 3.0L, SFI, V6, OHC, OPEL 1999 GM sourced
L64 P, ENG, M, ENGINE, FLEXIBLE FUEL, (GAS/ALC), 6 CYL, 3.1L, MFI, V6 1999 GM sourced
L65 P, ENG, M, ENGINE, DIESEL, 8 CYL, 6.5L, TURBO, HO 1998 GM sourced
L66 P, ENG, M, ENGINE, GAS, 6 CYL, 3.5L, MFI, V6, ALUM, HONDA, 128 — GM sourced
L67 P, ENG, M, ENGINE, GAS, 6 CYL, 3.8L, MFI, V6, SUPERCHARGED 1989 GM sourced
L68 Engine,2.5l(2.5u),l4,tbi — Reference
L69 ENGINE, GAS, 8 CYL, 5.0L, 4BBL, HO — Provisional
L6Y P, ENG, M, ENGINE, DIESEL, 6 CYL, 14.3L, SFI, L6, OHC, 287KW, ISUZU, 10302 — Provisional
L70 P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, MFI, TURBO, DOHC 1998 GM sourced
L71 P, ENG, M, ENGINE, GAS, 4 CYL, 1.2L, TBI 1998 Provisional
L72 P, ENG, M, ENGINE, GAS, 6 CYL, 3.8L, SFI, V6, HO, SUPERCHARGED, GM, 10412 — GM sourced
L73 P, ENG, M, ENGINE, GAS, 4 CYL, 1.6L, TBI this code has more than one documented meaning — filter by year 1997 GM sourced
L74 P, ENG, M, ENGINE, GAS, 4 CYL, 1.6L, TBI, SOHC 1998 GM sourced
L75 P, ENG, M, ENGINE, GAS, 4 CYL, 2.0L, TBI 1997 GM sourced
L76 6.0-liter V8 engine with Active Fuel Management 2007–2011 GM sourced
L77 P, ENG, M, ENGINE, DIESEL, 4 CYL, 1.7L, L4, CRI, DOHC, ISU this code has more than one documented meaning — filter by year 1999 GM sourced
L78 P, ENG, M, ENGINE, ALCOHOL, 4 CYL, 2.0L, MFI, L4, OHC, BRA 1998 GM sourced
L79 P, ENG, M, ENGINE, GAS, 4 CYL, 1.8L, MFI, DOHC 1997 GM sourced
L80 P, ENG, M, ENGINE, GAS, 6 CYL, 2.5L, MFI, DOHC 1997 GM sourced
L81 P, ENG, M, ENGINE, GAS, 6 CYL, 3.0L, MFI, DOHC, OPEL, 128 E, 0 — 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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