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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 1–100 of 640 codes beginning with Z. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| Z01 | COMFORT AND CONVIENCE GROUP | — | Provisional |
| Z02 | P, PERFORMANCE PACKAGE, TURBO | 1991 | GM sourced |
| Z03 | P, APP, R, APPEARANCE PACKAGE, ANNIVERSARY, 229 E 1, 1, A this code has more than one documented meaning — filter by year | — | GM sourced |
| Z04 | P, SALES PACKAGE, RALLY, 20813 E 1, 1, A this code has more than one documented meaning — filter by year | — | GM sourced |
| Z05 | P, CND, R, CONVENIENCE PKG this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| Z06 | P, PERFORMANCE PACKAGE, HARD TOP SPORT COUPE | 1998 | GM sourced |
| Z07 | P, PERFORMANCE PACKAGE, AGGRESSIVE SPORT this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| Z08 | MODEL CONVERSION, CONVERTIBLE | — | Provisional |
| Z09 | Caprice Classic(merchandising Option)(1bl19 & Z09 = 1bn19) this code has more than one documented meaning — filter by year | — | Reference |
| Z0B | P, EQC, R, EQUIPMENT ADDITIONAL, IRELAND (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0C | P, EQC, R, EQUIPMENT ADDITIONAL, POLAND (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0D | P, EQC, R, EQUIPMENT ADDITIONAL, BELGIUM (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0E | P, EQC, R, EQUIPMENT ADDITIONAL, AUSTRIA (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0F | P, EQC, R, EQUIPMENT ADDITIONAL, GERMANY (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0G | P, EQC, R, EQUIPMENT ADDITIONAL, NETHERLANDS (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0H | P, EQC, R, EQUIPMENT ADDITIONAL, ITALY (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0I | P, EQC, R, EQUIPMENT ADDITIONAL, DENMARK (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0J | P, MSM, R, MODEL CONVERSION, COMFORT | 1999 | Provisional |
| Z0K | P, SGR, R, MERCHANDISED PKG, SPORT VERSION, 216 E 0 | — | GM sourced |
| Z0L | P, MSM, R, MODEL CONVERSION, ELEGANCE | 1999 | Provisional |
| Z0M | P, MSM, R, MODEL CONVERSION, PRESTIGE | 1999 | Provisional |
| Z0N | P, MSM, R, MODEL CONVERSION, EXECUTIVE, 104 E 0, 0, A | — | Provisional |
| Z0P | P, CTY, R, COUNTRY, TURKEY (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0Q | P, CND, R, CONVENIENCE PKG, EDITION 'TURBO', 522 E 0, 0, A | — | Provisional |
| Z0R | P, EQC, R, EQUIPMENT ADDITIONAL, PORTUGAL (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0S | P, EQUIPMENT, COMMERCIAL - DELETE | 1998 | Provisional |
| Z0T | P, EQC, R, EQUIPMENT ADDITIONAL, SPAIN (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0U | P, EQC, R, EQUIPMENT ADDITIONAL, NORWAY (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0V | P, EQC, R, EQUIPMENT ADDITIONAL, FINLAND (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0W | P, EQC, R, EQUIPMENT ADDITIONAL, FRANCE (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0X | P, EQC, R, EQUIPMENT ADDITIONAL, SWEDEN (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0Y | P, EQC, R, EQUIPMENT ADDITIONAL, SWITZERLAND (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z0Z | P, EQC, R, EQUIPMENT ADDITIONAL, TAIWAN (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z10 | P, SGR, R, MERCHANDISED PKG, CARGO VAN | 1995 | GM sourced |
| Z11 | ALUMINUM NOSED 430HP 427 IMPALA | — | Provisional |
| Z12 | Package,functional And Appearance(merchandising Option) | — | Reference |
| Z13 | Model Conversion Buick Regal Gran Sport | — | Reference |
| Z14 | P, SGR, R, MERCHANDISED PKG, CX, 10718 E 1 | — | Provisional |
| Z15 | P, APP, R, APPEARANCE PACKAGE, COMMEMORATIVE EDITION, 20920 E 1, 1, A this code has more than one documented meaning — filter by year | — | GM sourced |
| Z16 | Appearance Package,grand Sport Edition this code has more than one documented meaning — filter by year | — | Reference |
| Z17 | P, SGR, R, MERCHANDISED PKG, BUICK CXL, 621 M 1, 1, A | — | Provisional |
| Z18 | P, APP, R, APPEARANCE PACKAGE, EUROPEAN COMMEMORATIVE EDITION, 20920 E 1, 1, A | — | GM sourced |
| Z19 | P, PERFORMANCE PACKAGE, COUPE | 1996 | GM sourced |
| Z1A | P, FAN, 2 SPEED | 1997 | Provisional |
| Z1B | P, WASHER, NOZZLES, HEATED, WINDSHIELD (USE XA7) | 1997 | Provisional |
| Z1C | P, LAMP, INTR, ROOF, DUAL READING (USE C74) | 1997 | Provisional |
| Z1D | P, COMPARTMENT, STOWAGE, OVER CAB | 1997 | Provisional |
| Z1E | P, SEAT CUSHION, HD | 1997 | Provisional |
| Z1F | P, IDENTIFICATION, SPEEDOMETER KILOMETER | 1999 | GM sourced |
| Z1G | P, IDENTIFICATION, SPEEDOMETER MILES | 1999 | GM sourced |
| Z1H | P, CND, R, CONVENIENCE PKG, CAMPAIGN 01/1 | 1999 | Provisional |
| Z1J | P, EQC, R, EQUIPMENT ADDITIONAL, ICELAND (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z1K | P, EQC, R, EQUIPMENT ADDITIONAL, TURKEY (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z1L | P, SBR, R, ADJUSTER, SEAT, 4 WAY, POWER VERT, MANUAL HORIZ, DRIVER | 1999 | Provisional |
| Z1M | P, EQUIPMENT, MEMORY SEAT ADJ, 3 POS (USE ADJ OPT) | 1997 | Provisional |
| Z1N | P, EQC, R, EQUIPMENT ADDITIONAL, INDONESIA (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z1O | P, EQC, R, EQUIPMENT ADDITIONAL, HUNGARY (FOR OPEL USE ONLY), 927 E 0, 0, A | — | Provisional |
| Z1P | P, EQC, R, EQUIPMENT ADDITIONAL, BRAZIL (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z1Q | P, NPC, M, CONVERSION NAME PLT, EMBLEM "EXECUTIVE" | 1999 | Provisional |
| Z1R | P, APM, R, ADJUSTER PASS ST, SEAT, 4 WAY, POWER VERT, MANUAL HORIZ, PASSENGER | 1999 | Provisional |
| Z1S | P, EQC, R, EQUIPMENT ADDITIONAL, EGYPT (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z1T | P, EQC, R, EQUIPMENT ADDITIONAL, MALAYSIA (FOR OPEL USE ONLY) | 1999 | Provisional |
| Z1U | P, SALES PACKAGE, CAMPAIGN-2000 | 1999 | Provisional |
| Z1V | P, EQUIPMENT, ADDITIONAL KEY | 1997 | GM sourced |
| Z1X | P, CCT, R, PAINT, ONE COAT, BASE COAT | 1998 | GM sourced |
| Z1Y | P, CCT, R, PAINT, TWO COAT, BASE COAT & CLEAR COAT | 1998 | GM sourced |
| Z20 | MONTE CARLO SS 454 | — | Provisional |
| Z21 | Beretta 'gt'(1lv37 + Z21 = 1lw37) this code has more than one documented meaning — filter by year | — | Reference |
| Z22 | Roadmaster Itt Lmtd(merchandising Option)(4bn69 & Z22 = 4bt69) | — | Reference |
| Z23 | INTERIOR DECOR PACKAGE | — | Provisional |
| Z24 | Sport Coupe | — | Reference |
| Z25 | P, APP, R, APPEARANCE PACKAGE, 50TH ANNIVERSARY (LIMITED EDITION) this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| Z26 | Merchandising Pkg,opel Conversion(export) | — | Reference |
| Z27 | Heritage 427 Package Stripes this code has more than one documented meaning — filter by year | — | Reference |
| Z28 | P, SGR, R, MERCHANDISED PKG, SPECIAL PERFORMANCE this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| Z29 | P, SALES PACKAGE, DALE EARNHARDT EDITION, 10419 E 1 | — | GM sourced |
| Z2A | P, CND, R, CONVENIENCE PKG, CAMPAIGN 99/1 | 1997 | Provisional |
| Z2B | P, CND, R, CONVENIENCE PKG, CAMPAIGN 00/1 | 1998 | Provisional |
| Z2C | P, CND, R, CONVENIENCE PKG, CAMPAIGN 98/1 | 1997 | Provisional |
| Z2D | P, CND, R, CONVENIENCE PKG, CAMPAIGN 98/2 | 1997 | Provisional |
| Z2E | P, CND, R, CONVENIENCE PKG, CAMPAIGN 98/3 | 1997 | Provisional |
| Z2F | P, CND, R, CONVENIENCE PKG, CAMPAIGN 98/4 | 1997 | Provisional |
| Z2G | P, CND, R, CONVENIENCE PKG, EDITION STAR SILVER | 1998 | Provisional |
| Z2H | P, SALES INCENTIVE, CAMPAIGN 'OPEL 100 YEARS CAR MANUFACTURING' | 1998 | Provisional |
| Z2J | P, SALES INCENTIVE, NORTH GATE | 1999 | Provisional |
| Z2K | P, SALES INCENTIVE, CAMPAIGN 94/1 | 1997 | Provisional |
| Z2R | P, CND, R, CONVENIENCE PKG, CAMPAIGN 97/3 | 1997 | Provisional |
| Z2S | P, SALES INCENTIVE, CAMPAIGN 99/2 | 1997 | Provisional |
| Z2T | P, NPC, M, CONVERSION NAME PLT, EMBLEM-100 YEARS OPEL | 1998 | Provisional |
| Z2U | P, CND, R, CONVENIENCE PKG, CAMPAIGN 96/1 | 1997 | Provisional |
| Z2V | P, SALES INCENTIVE, CAMPAIGN 96/2 | 1997 | Provisional |
| Z2Y | P, VEHICLE, IRMSCHER UPFIT, WORLD CUP | 1998 | Provisional |
| Z30 | Performance Package 60th Anniversary Stripes | — | Reference |
| Z31 | P, IDENTIFICATION, PRICE SHEET ADVANCE | 1998 | Provisional |
| Z32 | Canadian Parisienne(pontiac) | — | Reference |
| Z33 | Appearance Package, Special Edition Z06 | — | Reference |
| Z34 | Chevrolet Lumina Z34(merchandising Option)(1wm27 + Z34 = 1wp27) | — | Reference |
| Z35 | Sales Package Z - Series | — | Reference |
| Z36 | Package,pontiac Conversion(canadian) | — | Reference |
| Z3A | P, ORNAMENTATION, LETTERING "16 V" | 1998 | Provisional |
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.