← 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 201–300 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 |
|---|---|---|---|
| Z86 | Package Recreational Suburban Slx | — | Reference |
| Z87 | P, CHP, R, CHASSIS PACKAGE, LOW RIDER PERFORMANCE, 307 | — | GM sourced |
| Z88 | P, MAR, M, MARKET BRAND, GMC, 10507 | — | GM sourced |
| Z89 | Conversion Name Plt Isuzu | — | Reference |
| Z8I | CAMPER PROVISIONS, SPECIAL | — | Provisional |
| Z90 | Diesel Package | — | Reference |
| Z94 | Converter System,canadian Oxidizing(export) | — | Reference |
| Z95 | Suspension, Magnetic Ride Control | 2026 | GM sourced |
| Z98 | Conversion,canadian Pontiac(canadian) | — | Reference |
| ZA1 | P, PROVISIONS, MISC EQUIP IRAQ | 1990 | Provisional |
| ZA6 | P, SPP, R, PACKAGE, PRICE LEADER | 1998 | Provisional |
| ZA7 | P, SPP, R, PACKAGE, VALUE LEADER-CANADIAN | 1998 | GM sourced |
| ZA9 | P, EQUIPMENT, MISC EQUIP FOR COLOMBIA (G.M. PLATFORM CONTROLLED) | 1998 | GM sourced |
| ZAA | P, SPT, R, TIRE SPARE, COMPACT this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| ZAB | P, SPT, R, TIRE SPARE, COMPACT 17", 20911 | — | GM sourced |
| ZAC | Tire Spare Compact 16' | — | Reference |
| ZAD | Tire Spare T115/70r16 SL 92m BW Spr | — | Reference |
| ZAE | Tire, spare | 2026 | GM sourced |
| ZAF | Tire Spare Spare, Compact Size, 15' | — | Reference |
| ZAG | Wheel Spare, Compact Size, 15x4, 5 Lugs' | — | Reference |
| ZAH | Wheel Spare, Compact Size, 16x4 | — | Reference |
| ZAI | Tire Spare Compact, T125/70d15 95m | — | Reference |
| ZAJ | Tire Spare P205/70r16 96h BW Al2 | — | Reference |
| ZAK | 2009 Oem Engine Physical ID Zak & Production Number 12602086 this code has more than one documented meaning — filter by year | — | Reference |
| ZAL | Tire Spare T105/70d14 SL 84m BW Spr | — | Reference |
| ZAN | Tire Spare P265/70r17-113s BW R/pe ST TL Al2 | — | Reference |
| ZAP | P, SPT, R, TIRE SPARE, 7.50R-16/F 12PR BL R/ST TT HWY | 1997 | Provisional |
| ZAQ | P, SPT, R, TIRE SPARE, P265/70R17-113H BW R/PE ST TL AL2, 10131 | — | GM sourced |
| ZAR | Tire Spare P195/75r15/n BL R/pe ST TL Als | — | Reference |
| ZAS | P, SPT, R, TIRE SPARE, P265/70R17-113S WOL R/PE ST TL AL2 this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZAX | Tire Spare P265/75r16 SL 114t BW AT | — | Reference |
| ZAY | Tire Spare 205/70r16 97h BW Hw3 | — | Reference |
| ZAZ | Plant Code Zaporozhye, Ukraine | — | Reference |
| ZB8 | P, EQUIPMENT, MISC EQUIP FOR COLOMBIA (COLOMBIA CONTROLLED) | 1998 | Provisional |
| ZB9 | P, PARTS, NORTH AMERICAN PARTS SOURCED IN COLOMBIA (COLOMBIACONTROLLED) | 1998 | Provisional |
| ZBB | Tire Spare P235/70r15 Wol R/pe ST TL Oor 102s | — | Reference |
| ZBD | Tire Spare Lt225/75r17/e BW TL Hwy 113q | — | Reference |
| ZBE | Tire Spare Compact, T125/70r17 98m | — | Reference |
| ZBF | P, SPT, R, TIRE SPARE, P235/70R15-102S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZBG | P, SPT, R, TIRE SPARE, P235/70R15-102S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZBI | Tire Spare Compact, T155/90d16 110m | — | Reference |
| ZBK | Tire Spare Lt245/75r16/c BL R/pe ST Tbl Als (9591407) | — | Reference |
| ZBL | P, SPT, R, TIRE SPARE, P265/70R17-113H BW TL ST OOR, 20405 | — | GM sourced |
| ZBM | 2010 Oem Engine Physical ID Zbm & Production Number 12613712 | — | Reference |
| ZBN | P, SPT, R, TIRE SPARE, LT245/75R16/C BL R/PE ST TL OOR, 20308 | — | GM sourced |
| ZBO | P, SPT, R, TIRE SPARE, 215/80R16 6PR BL TL RADIAL | 1997 | Provisional |
| ZBX | P, SPT, R, TIRE SPARE, LT245/75R16/C WOL R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZBY | P, SPT, R, TIRE SPARE, LT245/75R16/D BW R/PE ST TL A/T 114S | 1997 | Provisional |
| ZBZ | Tire Spare P255/70r17 SL 110h BW Als | — | Reference |
| ZCA | P, SPT, R, TIRE SPARE, P205/75R15-97S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZCC | P, SPT, R, TIRE SPARE, P255/70R16 BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| ZCD | Tire Spare T135/70r18 SL 104m BW Spr | — | Reference |
| ZCE | P, SPT, R, TIRE SPARE, P205/75R15/N BL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZCF | Tire Spare | — | Reference |
| ZCG | Tire Spare | — | Reference |
| ZCJ | P, SPT, R, TIRE SPARE, P255/70R16 WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| ZCM | Tire Spare P215/75r15 Wol R/pe ST TL Als 100s | — | Reference |
| ZCP | P, SPT, R, TIRE SPARE, P255/70R16-109H BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ZCU | P, SPT, R, TIRE SPARE, P215/75R15/N BL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZCV | Tire Spare P215/75r15/n Xnw R/pe ST TL Als (9591059) | — | Reference |
| ZCW | Tire Spare P215/75r15/n Rwl R/pe ST TL Als | — | Reference |
| ZCY | Tire Spare Compact, T155/90d17 SL 112m BW Spr | — | Reference |
| ZCZ | Tire Spare T155/70r18 SL 112m BW | — | Reference |
| ZD8 | P, BONUS VALUE, PACKAGE "A" | 1985 | Provisional |
| ZD9 | P, BONUS VALUE, PACKAGE "B" | 1985 | Provisional |
| ZDC | Tire Spare Compact, T125/70r16 | — | Reference |
| ZDE | P, SPT, R, TIRE SPARE, 7.50-16LT/D BL D/NY TL HWY this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZDF | P, SPT, R, TIRE SPARE, P255/45R17-95V BW R/PE ST TL AL3, 20305 | — | Provisional |
| ZDG | P, SPT, R, TIRE SPARE, P235/50R18-97W BW R/PE ST TL AL3, 20305 | — | Provisional |
| ZDL | Tire Spare | — | Reference |
| ZDM | Tire Spare | — | Reference |
| ZDP | P, SPT, R, TIRE SPARE, 12.00R20 18PR BL R/ST OOR | 1997 | Provisional |
| ZDQ | P, SPT, R, TIRE SPARE, 10.00R20/H 16PR BL RADIAL TT | 1988 | GM sourced |
| ZDS | P, SPT, R, TIRE SPARE, P225/65R17-100S WOL PE/ST TL ALS, 328 | — | Provisional |
| ZDT | P, SPT, R, TIRE SPARE, P225/65R17-100S BW PE/ST TL ALS, 612 | — | Provisional |
| ZE1 | Stripe,body Side Lower(canadian) | — | Reference |
| ZE3 | Cameo Decor Package | — | Reference |
| ZE4 | Acadian Decor,exterior | — | Reference |
| ZE5 | P, IDENTIFICATION, TRIM LEVEL BASE | 1998 | GM sourced |
| ZE6 | P, SALES PROCESSING OPT, #22 | 1987 | Provisional |
| ZE7 | Restraint,seat Belt And Shoulder Harness(canadian) | — | Reference |
| ZE9 | Stripe,body Side Lower(canadian) | — | Reference |
| ZEA | Tire Spare 7.50-16lt/d BL D/pe TL Hwy | — | Reference |
| ZEB | P, SPT, R, TIRE SPARE, P235/75R15/N WOL R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1988 | GM sourced |
| ZEC | P, SPT, R, TIRE SPARE, LT215/85R16/E BW R/ST ST TL HWY this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| ZED | Tire Spare 8.00r19.5/e BW R/st TL Bridgestone | — | Reference |
| ZEF | P, SPT, R, TIRE SPARE, LT215/85R16/E BW R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZEJ | P, SPT, R, TIRE SPARE, 215/45R17-91V TL R/ST, 20827 E 5 | — | Provisional |
| ZEK | P, SPT, R, TIRE SPARE, 7.50-16LT 12PR BL D/NY TT HWY 7000KG GVM, (OVERSEAS) | 1998 | Provisional |
| ZEN | P, SPT, R, TIRE SPARE, P235/75R16-109S BW R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZEO | P, SPT, R, TIRE SPARE, P235/75R16-109S WS R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZEP | P, SPT, R, TIRE SPARE, P235/75R16-109S WOL R/PE ST TL ALS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZER | P, SPT, R, TIRE SPARE, LT265/75R16/E BW R/PE ST TL OOR (123/120Q), 20308 | — | GM sourced |
| ZES | P, SPT, R, TIRE SPARE, P235/75R15-105S BW R/PE ST TL OOR this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| ZET | P, SPT, R, TIRE SPARE, P225/75R15 BW R/PE ST TL ALS, 11108 this code has more than one documented meaning — filter by year | — | GM sourced |
| ZEU | Tire Spare P225/75r15/n Xnw R/pe ST TL Als | — | Reference |
| ZEV | Tire Spare,p225/75r15 (steel Belted) Als Radial Rwl | — | Reference |
| ZEW | P, SPT, R, TIRE SPARE, 7.00R16/E 10PR BL R/ST TT (GVM 5200KG) | 1997 | Provisional |
| ZF2 | Cavalier Sport Package(canadian) | — | Reference |
| ZF3 | Sport Package(canadian) | — | 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.