← 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 501–600 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 |
|---|---|---|---|
| ZR8 | P, WAR, R, WARRANTY, ENGINE ONLY, 100,000 MILES, 3 YEARS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZR9 | C, APP, R, APPEARANCE PACKAGE, "SYCLONE" PICKUP this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| ZRB | P, SPT, R, TIRE SPARE, 9.00-20/G 14PR BW BIAS TT | 1998 | Provisional |
| ZRD | P, SPT, R, TIRE SPARE, P215/70R16-99S BW PE/ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZRH | P, SPT, R, TIRE SPARE, 215/85R16/E BW TL (R187 TREAD), 229 | — | Provisional |
| ZRL | P, SPT, R, TIRE SPARE, 235/80R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZRM | Tire Spare 255/70r22.5/g 14pr BL Radial TL | — | Reference |
| ZRN | P, SPT, R, TIRE SPARE, 295/75R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| ZRP | P, SPT, R, TIRE SPARE, 11.00R20/H 16PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| ZRQ | Tire Spare 8.00x16.5/c BL D/pe TL Hwy (378525) | — | Reference |
| ZRR | P, SPT, R, TIRE SPARE, 11.00R20/G 14PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZRS | Tire Spare P265/70r17-113s | — | Reference |
| ZRT | Tire Spare 255/60r17-106h BW ST TL Hwy | — | Reference |
| ZRU | Tire Spare 8.75r-16.5-d (polyester-steel Belted) Hwy Radial B/wall | — | Reference |
| ZRV | P, SPT, R, TIRE SPARE, 285/75R24.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| ZRX | Suspension, Off-Road with 2 inch factory installed lift and Multimatic DSSV dampers | 2026 | GM sourced |
| ZS0 | P, SGS, R, SEO VEHICLE, AMBULANCE (ONE STRETCHER), 911 E 5, 5, A | — | Provisional |
| ZSA | P, SPT, R, TIRE SPARE, 245/50R18-100V BW TL AL3, 21009 | — | Provisional |
| ZSB | P, SPT, R, TIRE SPARE, 255/80R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| ZSH | P, SPT, R, TIRE SPARE, 275/80R22.5/G 14PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| ZSJ | P, SPT, R, TIRE SPARE, 275/80R24.5/G 14PR BL TL RADIAL | 1997 | GM sourced |
| ZSK | P, SPT, R, TIRE SPARE, 295/80R22.5/H 16PR BL TL RADIAL | 1989 | GM sourced |
| ZSL | P, SPT, R, TIRE SPARE, 275/80R22.5/H 16PR BL TL RADIAL | 1994 | GM sourced |
| ZSM | P, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST TL ALS | 1998 | GM sourced |
| ZSP | P, SPT, R, TIRE SPARE, 385/65R22.5/J 18PR BW TL RADIAL | 1992 | GM sourced |
| ZSR | Tire Spare P235/75r16-106s BW TL Oor | — | Reference |
| ZSS | P, SPT, R, TIRE SPARE, P275/55R20-111S BW TL ST AL2, 20405 | — | Provisional |
| ZSW | P, SPT, R, TIRE SPARE, 8.25-20 12PR BL D/NY TT HWY (OVERSEAS) | 1997 | GM sourced |
| ZT2 | P, SPP, R, PACKAGE, MONZA, CLASSIC, FUEL INJECTION | 1998 | Provisional |
| ZTA | P, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST TL OOR this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZTB | P, SPT, R, TIRE SPARE, 255/70R22.5/H 16PR BL TL RADIAL this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZTC | Tire Spare 265/70r19.5/g 14pr BL TL Rad | — | Reference |
| ZTE | Tire Spare P245/65r17-105s BW Pe/st TL Oor | — | Reference |
| ZTF | Tire Spare | — | Reference |
| ZTH | Tire Spare 8.75-16.5lt/e BL D/ny TH Hwy (3927095) | — | Reference |
| ZTI | P, SPT, R, TIRE SPARE, 245/70R19.5/F 12PR BL TL RAD this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| ZTJ | Tire Spare 225/70r19.5/f BW R/st ST TL Oor | — | Reference |
| ZTM | Tire Spare P245/65r17-105s BW Pe/st TL Als | — | Reference |
| ZTN | P, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST ST TL HWY this code has more than one documented meaning — filter by year | 1990 | GM sourced |
| ZTP | P, SPT, R, TIRE SPARE, 215/70R16-100T BW PE/ST TL HWY (BFS), 20812 | — | Provisional |
| ZTQ | P, SPT, R, TIRE SPARE, 245/75R22.5/G BL TL RAD this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZTU | P, SPT, R, TIRE SPARE, 265/75R22.5/G BL TL RAD this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZTV | P, SPT, R, TIRE SPARE, 8.00R19.5/E BW TL HWY ST GOODYEAR WRANGLER this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZTW | P, SPT, R, TIRE SPARE, 8.00R19.5/F BW R/PE ST TL HWY this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| ZTX | P, SPT, R, TIRE SPARE, 8.00R19.5/F 12PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZTY | P, SPT, R, TIRE SPARE, 245/70R19.5/G 14PR BL TL RAD this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| ZU1 | P, SPP, R, PACKAGE, PICK-UP BOX "DELUXE", 427 E 5, 5, A | — | Provisional |
| ZU4 | P, SPP, R, PACKAGE, CHEVETTE, BASE MODEL | 1998 | Provisional |
| ZUE | P, SPT, R, TIRE SPARE, 9.00R22.5/F 12PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZUH | P, SPT, R, TIRE SPARE, 9.00R22.5/G 14PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZUI | P, SPT, R, TIRE SPARE, 10.00-20/F 12PR BL BIAS TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZUJ | P, SPT, R, TIRE SPARE, 10.00-20/G 14PR BL BIAS TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZUK | Tire Spare 9.00-20.0/e 10pr BL Bias TT | — | Reference |
| ZUM | Tire Spare 9.00-22.5/e 10pr BL Bias TL | — | Reference |
| ZUN | P, SPT, R, TIRE SPARE, 9.00R20.0/F 12PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZUQ | P, SPT, R, TIRE SPARE, 10.00-20/H 16PR BL BIAS TT | 1997 | Provisional |
| ZUR | Tire Spare 10.00-22.5/f 12pr BL Bias TL | — | Reference |
| ZUV | P, SPT, R, TIRE SPARE, 9.00R20.0/G 14PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZUX | P, SPT, R, TIRE SPARE, 195/65R15-91H BW TL R/ST | 1999 | GM sourced |
| ZUZ | Tire Spare 31x10.50r15lt/b Wol R/pe ST TL Oor (9591094) | — | Reference |
| ZV1 | P, STATEMENT OF ORIGIN, MANUFACTURE | 1984 | GM sourced |
| ZV2 | P, STATEMENT OF ORIGIN, MANUFACTURES NOMINAL TON RATING | 1986 | GM sourced |
| ZV3 | P, STATEMENT OF ORIGIN, MANUFACTURES GROSS VEHICLE WEIGHT | 1986 | GM sourced |
| ZV4 | P, STATEMENT OF ORIGIN, MANUFACTURES DRY CHASSIS WEIGHT | 1986 | GM sourced |
| ZV5 | Trim,wrangler Package 'a' | — | Reference |
| ZV6 | Modification RR Shock Damping, European Requirement | — | Reference |
| ZV8 | Eurosport Package(merchandising Option) this code has more than one documented meaning — filter by year | — | Reference |
| ZVA | P, SPT, R, TIRE SPARE, P235/60R18-102V BW TL AL3, 11120 | — | Provisional |
| ZVB | P, SPT, R, TIRE SPARE, P255/55R18-104V BW TL AL3, 11120 | — | Provisional |
| ZVD | Tire Spare 8.75r16.5/e BL R/pe ST TL Hwy (9590755) | — | Reference |
| ZVE | P, SPT, R, TIRE SPARE, 8.00R16.5/E BL R/PE ST TL OOR GDY (SEO) | 1998 | GM sourced |
| ZVI | Tire Spare 10.00/90r20/f 12pr BL Radial TT | — | Reference |
| ZVK | P, SPT, R, TIRE SPARE, 8.25-16ZZ 14PR BL RADIAL TT HWY (OVERSEAS) | 1997 | Provisional |
| ZVL | P, SPT, R, TIRE SPARE, P265/70R17-113S BW R/PE ST TL ALS, 1106 | — | GM sourced |
| ZVM | P, SPT, R, TIRE SPARE, P265/70R17-113S WOL R/PE ST TL ALS, 1106 | — | Provisional |
| ZVQ | Tire Spare 8.00-19.5/d 8pr BL Bias TL | — | Reference |
| ZVT | Tire Spare P265/60r17-108h BW TL Al3 Police | — | Reference |
| ZW2 | P, GPK, R, WINDOW PKG, RR DRS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZW3 | P, GPK, R, WINDOW PKG, RR DRS, SIDE RR DR this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZW4 | P, GPK, R, WINDOW PKG, RH SIDE, RR DRS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZW5 | P, WAR, R, WARRANTY, 150,000 MILES, 4 YEARS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ZW6 | P, GPK, R, WINDOW PKG, COMPLETE BODY this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| ZW7 | Suspension, Premium Smooth Ride this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| ZW9 | Pickup bed, delete this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| ZWA | P, SPT, R, TIRE SPARE, 13.00/80R20/J 18PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZWC | P, SPT, R, TIRE SPARE, 11.00-20.0/G 14PR BL BIAS TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWD | Tire Spare 11.00-22.5/f 12pr BL Bias TL | — | Reference |
| ZWE | Tire Spare 11.00-22.5/g 14pr BL Bias TL | — | Reference |
| ZWF | Tire Spare Lt265/70r18/e 124s BW TL Als | — | Reference |
| ZWG | P, SPT, R, TIRE SPARE, 7.50R16/D BW R/ST ST TL HWY this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| ZWH | P, SPT, R, TIRE SPARE, 10.00R20/G 14PR BL RADIAL TT this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWJ | P, SPT, R, TIRE SPARE, 10.00R22.5/F 12PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWK | P, SPT, R, TIRE SPARE, 10.00R22.5/G 14PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWL | P, SPT, R, TIRE SPARE, 11.00R22.5/G 14PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWM | P, SPT, R, TIRE SPARE, 11.00R22.5/H 16PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWN | P, SPT, R, TIRE SPARE, 315/80R22.5/J 18PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| ZWP | P, SPT, R, TIRE SPARE, 12.00R22.5/H 16PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| ZWR | P, SPT, R, TIRE SPARE, 315/80R22.5/L 20PR BL RADIAL TL this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| ZWU | Tire Spare P265/75r15-112s BW TL Oor | — | Reference |
| ZWX | P, SPT, R, TIRE SPARE, 7.50R16/D BL R/PE ST TL OOR | 1988 | 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.