← All owner tools · Decode your own SPID label with the GM RPO decoder
| 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 401–500 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 |
|---|---|---|---|
| ZL8 | Package,'cameo Pickup' | — | Reference |
| ZL9 | Interior,luxury | — | Reference |
| ZLA | Infotainment Package | 2022 | Provisional |
| ZLB | P, SPT, R, TIRE SPARE, LT285/75R16/C BW ST TL OOR, 20429 | — | GM sourced |
| ZLC | Sales Package Corvette Centennial Edition | — | Reference |
| ZLH | P, SPT, R, TIRE SPARE, LT265/70R17/D BW ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZLI | Tire Spare 225/75r15 BW TL Als Type 'c' | — | Reference |
| ZLJ | P, SPT, R, TIRE SPARE, P235/60R17-100S BW R/PE ST TL AL2, 125 | — | Provisional |
| ZLK | P, SPT, R, TIRE SPARE, P235/60R17-103S WOL R/PE ST TL AL2, 125 | — | Provisional |
| ZLL | P, SPT, R, TIRE SPARE, LT265/70R17/D WOL ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZLN | P, SPT, R, TIRE SPARE, 235/70R15-103H BW TL HWY this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| ZLO | Tire Spare 235/70r15 BW TL Oor | — | Reference |
| ZLP | P, SPT, R, TIRE SPARE, LT245/75R16/E BW R/PE ST TL ALS 120/116S, 1218 | — | GM sourced |
| ZLQ | Fleet Convenience Package this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| ZLS | P, SPT, R, TIRE SPARE, LT245/75R16/E BW R/PE ST TL OOR 120/116S, 1218 | — | GM sourced |
| ZM1 | Enhanced Trailer View | 2026 | GM sourced |
| ZM2 | Special Deluxe Touring Package | — | Reference |
| ZM3 | 'cameo El' Package | — | Reference |
| ZM4 | Package,luggage Carrier/rear Window Deflector | — | Reference |
| ZM5 | P, SALES PACKAGE, UNDERBODY SHIELD this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| ZM6 | P, CHP, R, CHASSIS PACKAGE, "OFF ROAD" SUSPENSION this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZM7 | Package,intermittent Wiper And Tilt Wheel | — | Reference |
| ZM8 | P, SALES PACKAGE, COMBINATION - ELECTRIC TAILGATE RELEASE/RR WINDOW DEFOGGER this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| ZM9 | SLE Heated package this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| ZMB | Tire Spare 10.00-22.5/e 10pr BL Bias TL | — | Reference |
| ZMD | P, SPT, R, TIRE SPARE, P225/75R15/X BW R/PE ST TL OOR 105Q (X/LOAD), 224 | — | GM sourced |
| ZMJ | P, SPT, R, TIRE SPARE, P265/70R16-111S BW R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZMK | P, SPT, R, TIRE SPARE, P265/70R16-111S WOL R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZMO | P, SPT, R, TIRE SPARE, 235/75R15-105S BW R/PE ST TL AT, 224 | — | GM sourced |
| ZMP | P, SPT, R, TIRE SPARE, LT245/75R16/E BW R/PE ST TL ALS 120R, 10612 | — | GM sourced |
| ZMW | Tire Spare P195/75r14/n BL R/pe ST TL Als (9591011) | — | Reference |
| ZN1 | Trailering Package | — | Reference |
| ZN2 | P, CHASSIS, SEQUENCE DELIVERY, WINNEBAGO | 1988 | GM sourced |
| ZN4 | P, IDENTIFICATION, 1998 EXTENDED BUILD this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZN5 | PAINT SPECIAL, TWO TONE SPORT | — | Provisional |
| ZN6 | P, CHASSIS, SEQUENCE DELIVERY, GRUMMEN-OLSON, STURGIS | 1988 | GM sourced |
| ZN7 | P, CHASSIS, SEQUENCE DELIVERY, GRUMMEN-OLSON, TULARE | 1988 | Provisional |
| ZN8 | P, CHASSIS, SEQUENCE DELIVERY, GRUMMEN-OLSON, SHERMAN | 1988 | Provisional |
| ZN9 | P, CHASSIS, SEQUENCE DELIVERY, GRUMMEN-OLSON, MAYFIELD | 1988 | Provisional |
| ZNA | Tire Spare 205/65r15 BW R/pe ST TL Hwy 94h | — | Reference |
| ZNC | P, SPT, R, TIRE SPARE, 245/70R19.5/H 16PR BL TL RAD, 10709 | — | GM sourced |
| ZNE | Tire Spare | — | Reference |
| ZNF | P, SPT, R, TIRE SPARE, P235/75R16-106S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZNG | P, SPT, R, TIRE SPARE, P235/75R16-106S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZNI | P, SPT, R, TIRE SPARE, 225/60R16-98W BW R/PE ST TL HW4, 1130 | — | Provisional |
| ZNK | P, SPT, R, TIRE SPARE, P245/75R16-109S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZNL | P, SPT, R, TIRE SPARE, P245/75R16-109S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZNM | P, SPT, R, TIRE SPARE, P245/70R17-108H BW TL ST ALS, 20405 | — | GM sourced |
| ZNP | Tire Spare 8.00r19.5/d BL R/st ST TL Hwy Michelin (14065888) | — | Reference |
| ZNX | P, SPT, R, TIRE SPARE, P225/60R16-97S BL R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZP0 | P, SAA, M, SEATING ARRANGEMENT, TEMPORARY DRIVER this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZP1 | C, SAA, M, SEATING ARRANGEMENT, DRIVER ONLY. TEMPORARY this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZP2 | P, SAA, M, SEATING ARRANGEMENT, DRIVER & PASS, LOW BACK this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZP3 | P, SAA, M, SEATING ARRANGEMENT, 15 PASS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZP4 | P, SAA, M, SEATING ARRANGEMENT, 4 PASS | 1998 | GM sourced |
| ZP5 | P, SAA, M, SEATING ARRANGEMENT, 5 PASS | 1998 | GM sourced |
| ZP6 | P, SALES PACKAGE, COMBINATION - RR WINDOW WIPER/RR WINDOW DEFOGGER this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| ZP7 | P, SAA, M, SEATING ARRANGEMENT, 7 PASS | 1998 | GM sourced |
| ZP8 | P, SAA, M, SEATING ARRANGEMENT, 8 PASS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZP9 | P, WAR, R, WARRANTY, 100,000 MILES, 5 YEARS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZPB | Tire Spare 7.50-16lt/c BL D/ny TT Hwy (346987) | — | Reference |
| ZPE | Tire Spare 7.50-16lt/d BL D/pe TT Hwy (362157) | — | Reference |
| ZPF | P, SPT, R, TIRE SPARE, 7.50-16LT/D BL D/NY TT HWY this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZPG | P, SPT, R, TIRE SPARE, 7.00-16 8PR BL NY (OVERSEAS) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZPH | P, SPT, R, TIRE SPARE, 7.50-17/D 8PR BW TT HWY | 1993 | GM sourced |
| ZPK | Tire Spare 7.50-16lt/e BL /ny TT Hwy (346991) | — | Reference |
| ZPL | P, SPT, R, TIRE SPARE, 7.50-16 10PR BL TT | 1997 | Provisional |
| ZPN | Warranty 36,000 Mile, 3 Years | — | Reference |
| ZPO | P, SPT, R, TIRE SPARE, P245/70R17-108S WOL TL ST ALS, 20405 | — | GM sourced |
| ZPP | Tire Spare P215/65r15/n Wol R/pe ST TL Al3 95h | — | Reference |
| ZPR | P, SPT, R, TIRE SPARE, P245/70R17-108S BW TL ST ALS, 20405 | — | GM sourced |
| ZPY | Tire Spare 7.50-20/d 8pr BL Bias TT | — | Reference |
| ZQ1 | P, CHP, R, CHASSIS PACKAGE, SMOOTH RIDE this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| ZQ2 | P, SALES PACKAGE, DRIVER CONVENIENCE | 1991 | GM sourced |
| ZQ3 | P, SALES PACKAGE, DRIVER CONVENIENCE II | 1991 | GM sourced |
| ZQ4 | P, CHASSIS, SEQUENCE DELIVERY, FLEETWOOD PENNSYLVANIA | 1989 | GM sourced |
| ZQ5 | P, CHASSIS, SEQUENCE DELIVERY, FLEETWOOD INDIANA | 1989 | GM sourced |
| ZQ6 | P, SALES PACKAGE, DRIVER CONVENIENCE III this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| ZQ7 | P, CHASSIS, SEQUENCE DELIVERY, FLEETWOOD CALIFORNIA | 1989 | GM sourced |
| ZQ8 | P, CHP, R, CHASSIS PACKAGE, SPORT | 1991 | GM sourced |
| ZQ9 | P, APP, R, APPEARANCE PACKAGE, EXTERIOR TRIM, BLACK OUT this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZQB | Chassis Opt Heightened Chassis | — | Reference |
| ZQC | Tire Spare | — | Reference |
| ZQF | Chassis Opt Increased Height Chassis | — | Reference |
| ZQG | P, SPT, R, TIRE SPARE, P235/70R15-102V BW R/PE ST TL AL3 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZQK | P, SPT, R, TIRE SPARE, 8.25R16 14PR BL R/ST TT HWY (OVERSEAS), (DUP WITH ZQM) | 1997 | Provisional |
| ZQL | Tire Spare 8.25-20.0/e 10pr BL Bias TT | — | Reference |
| ZQO | Tire Spare Lt235/80r17/e (120/117r) BW TL Hwy | — | Reference |
| ZQP | P, SPT, R, TIRE SPARE, 8.25R-20/G 14PR BW R/ST TL OOR | 1991 | Provisional |
| ZQQ | P, SPT, R, TIRE SPARE, 8.25R-20 14PR BL R/ST TL HWY (OVERSEAS) | 1997 | Provisional |
| ZQS | Tire Spare 7.50-20/e 10pr BL Bias TT | — | Reference |
| ZQT | Tire Spare 8.00r19.5/e 10pr BL Radial TL | — | Reference |
| ZQX | Tire Spare 8.25r20.0/f 12pr BL Radial TT | — | Reference |
| ZR1 | P, PERFORMANCE PACKAGE, SPECIAL COUPE | 1991 | GM sourced |
| ZR2 | P, CHP, R, CHASSIS PACKAGE, HIGH WIDER PERFORMANCE, 4 X 4 SPORT this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| ZR3 | Livery Package this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| ZR4 | Sales Package Appearance, Exterior, 'lt' | — | Reference |
| ZR5 | P, APP, R, APPEARANCE PACKAGE, SPORT CREW, 10904 | — | GM sourced |
| ZR6 | P, SHOW VEHICLE, ZONE | 1984 | GM sourced |
| ZR7 | P, APP, R, APPEARANCE PACKAGE, GRILLE & BUMPER CHROME this code has more than one documented meaning — filter by year | 1998 | 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.