← 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 501–588 of 588 codes beginning with P. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| PW4 | P, WHL, M, WHEEL, 15 X 7, ALUMINUM, 5 FLAT SPOKES | 1996 | Provisional |
| PW5 | P, WHL, M, WHEEL, 15 X 5.5, STEEL, 6 SPOKES | 1993 | Provisional |
| PW6 | P, WHL, M, WHEEL, 15 X 5.5, ALUMINUM, 8 SPOKES (LMA) | 1997 | Provisional |
| PW7 | P, WHL, M, WHEEL, 16 X 8, ALUMINUM, STYLED | 1985 | GM sourced |
| PW8 | P, WHL, M, WHEEL, 15 X 6, ALUMINUM, STYLED | 1985 | GM sourced |
| PW9 | P, WHL, M WHEEL, 15 X 7, ALUMINUM, 5 DOUBLE SPOKES | 1996 | GM sourced |
| PWG | Wheel 18 X 7.5 Aluminum, Chrome Clad | — | Reference |
| PWH | Wheel 17 X 7.0, J, Aluminum, Design 12 | — | Reference |
| PWL | Wheel 15 X 6.5, Steel, Design1 Tbd Global Delta | — | Reference |
| PWM | Wheel 16 X 6.5, Steel, Design2 | — | Reference |
| PWO | Family Code, Power Option | 1988 | GM dated |
| PWP | Wheel 17 X 7, Steel, Design3 Tbd Global Delta | — | Reference |
| PWT | Wheel 17 X 7, Steel, Design5 Tbd Global Delta | — | Reference |
| PWX | Wheel 17 X 7, Aluminium, Design8 Tbd Global Delta | — | Reference |
| PX0 | P, WHL, M WHEEL, 16 X 7, ALUMINUM, STYLED | 1987 | GM sourced |
| PX1 | P, WHL, M WHEEL, 13 X 5.5, ALUMINUM | 1984 | GM sourced |
| PX2 | P, WHL, M WHEEL, 16 X 7, ALUMINUM, CHROME, STYLED | 1992 | GM sourced |
| PX3 | P, WHL, M WHEEL, 14 X 5.5, ALUMINUM FABRICATED (LMA) | 1997 | Provisional |
| PX4 | P, WHL, M WHEEL, 13 X 4.5, 16 ROUND HOLES | 1983 | GM sourced |
| PX5 | P, WHL, M WHEEL, 13 X 5, 18 ROUND HOLES | 1983 | GM sourced |
| PX6 | P, WHL, M WHEEL, 13 X 5.5, 16 ROUND HOLES | 1983 | GM sourced |
| PX7 | P, WHL, M WHEEL, 14 X 5.5, TRIANGULAR HOLES | 1983 | GM sourced |
| PX8 | P, WHL, M WHEEL, 17 X 9.5 FRT & 18 X 10.5 RR, ALUMINUM, PAINTED, 20816 E, 1 | — | Provisional |
| PX9 | P, WHL, M WHEEL, 13 X 5.5, 8 OBLONG HOLES, HEAVY DUTY | 1995 | Provisional |
| PXD | Wheels, 18 inch machined aluminum wheel with Dark Grey metallic accents | 2026 | GM sourced |
| PXJ | Wheel 18 X 7.5, J, Aluminum, Design 7 | — | Reference |
| PXR | Wheel 18 X 8.0, J, Aluminum, Design 15 | — | Reference |
| PXS | Wheel 17 X 7.0, J, Aluminum, Design 11 | — | Reference |
| PXT | Wheels, 20 inch x 9 inch | 2026 | GM sourced |
| PXW | Wheel 18 X 8.0, J, Aluminum, Design 4 | — | Reference |
| PXX | Wheel 19 X 8.5, J, Aluminum, Design 3 | — | Reference |
| PY0 | P, WHL, M WHEEL, 16 X 6.5, ALUMINUM this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| PY1 | P, WHL, M WHEEL, 16 X 6.5, ALUMINUM, CHROME | 1995 | GM sourced |
| PY2 | P, WHL, M WHEEL, 16 X 6.5, CHROME APPEARANCE this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| PY3 | P, WHL, M WHEEL, 16 X 6.5, STEEL, STYLED | 1997 | GM sourced |
| PY4 | P, WHL, M WHEEL, 14 X 5.5, ALUMINUM (LMA) (USE PC6) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| PY5 | P, WHL, M WHEEL, 13 X 4.5, STEEL | 1996 | GM sourced |
| PY6 | P, WHL, M WHEEL, 16 X 6.5, 18 ROUND HOLES, 20308 E, 0 | — | GM sourced |
| PY7 | P, WHL, M WHEEL, 14 X 4.5, ALUMINUM | 1983 | GM sourced |
| PY8 | P, WHL, M WHEEL, 14 X 5.5, STEEL. this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| PY9 | P, WHL, M WHEEL, 17 X 7.5, CHROME APPEARANCE, 20320 | — | GM sourced |
| PYB | Wheel 18 X 7.0 Aluminum, Painted | — | Reference |
| PYC | Wheel 18 X 9.5 FRT & 19 X 12 Rr, Alum, Painted, Var 2 | — | Reference |
| PYD | Wheel 18 X 9.5 FRT & 19 X 12 Rr, Alum, Painted, Var 3 | — | Reference |
| PYE | Wheel 18 X 9.5 FRT & 19 X 12 Rr, Chrome, Var 2 | — | Reference |
| PYL | Family Code, Payload | 1988 | GM dated |
| PYN | Wheels, 17 inch painted steel, Silver | 2026 | GM sourced |
| PYP | Wheel 17 X 7.5, Chrome Appearance, HD 8 Lug | — | Reference |
| PYQ | Wheels, 17 inch machined aluminum | 2026 | GM sourced |
| PYR | Wheel 18 X 8.0, Forged Aluminum, Premium | — | Reference |
| PYS | Wheel 20 X 8.5, Forged Aluminum, Polished | — | Reference |
| PYT | Wheels, 18 inch painted steel | 2026 | GM sourced |
| PYV | Wheels, 18 inch machined aluminum with Silver painted accents, 6-spoke | 2026 | GM sourced |
| PYW | Wheels, 17 inch painted steel | 2026 | GM sourced |
| PYX | Wheel 17 X 7, Steel, Var 1 | — | Reference |
| PYY | Wheel 18 X 7, Aluminum 5 Spoke | — | Reference |
| PYZ | Wheel Spare 18 X 4.0, J, Aluminum, Design 1 | — | Reference |
| PZ0 | P, WHL, M WHEEL, 15 X 6, STEEL, 4 HOLES, 10126 E, 5 | — | Provisional |
| PZ1 | P, WHL, M WHEEL, 16 X 6, ALUMINUM, STYLED, 4 HOLES, 10126 E, 5 | — | Provisional |
| PZ2 | P, WHL, M WHEEL, 14 X 4.5, STEEL | 1998 | Provisional |
| PZ3 | P, WHL, M WHEEL, 18 X 7.5 ALUMINUM, PAINTED, 1109 E, 3 | — | GM sourced |
| PZ4 | P, WHL, M WHEEL, 18 X 7.5 ALUMINUM, POLISHED, 1109 E, 3 | — | GM sourced |
| PZ5 | P, WHL, M WHEEL, 19 X 8 ALUMINUM, PAINTED, 1109 E, 3 | — | GM sourced |
| PZ6 | P, WHL, M WHEEL, 19 X 8 ALUMINUM, POLISHED, 1109 E, 3 | — | GM sourced |
| PZ7 | P, WHL, M WHEEL, 19X8 (FRT) & 20X10 (RR) PAINTED ALUM, 10228 this code has more than one documented meaning — filter by year | — | GM sourced |
| PZ8 | Hitch View | 2026 | GM sourced |
| PZ9 | Fuel Tank Skid Plate, AEV this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| PZB | P, TNK, M FUEL TANK, 132L, 35 GAL, LH, RECT, 25 X 15, INCLUDES STEP this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| PZC | Wheel 13 X 5.0, Steel | — | Reference |
| PZD | Wheel 16 X 6.5, Aluminum | — | Reference |
| PZE | Wheel 17 X 6.5, Aluminum, Chrome, Var 1 | — | Reference |
| PZF | C, STP, R STRIPE, NOT DESIRED | 1991 | GM sourced |
| PZG | Front Skid Plate, AEV | 2026 | GM sourced |
| PZH | Wheel 13 X 4.5, Alloy | — | Reference |
| PZJ | Wheel 18 X 8, Aluminium, Design 12 | — | Reference |
| PZK | Wheel 18 X 8, Aluminium, Design 13 | — | Reference |
| PZL | Rear Differential Skid Plate, AEV | 2026 | GM sourced |
| PZN | Transfer Case Skid Plate, AEV | 2026 | GM sourced |
| PZO | Wheel 16 X 6.5j, Aluminium, Design24 | — | Reference |
| PZP | P, TNK, M FUEL TANK, 227L, 60 GAL, LH, RECT, 12.5 X 17.5 this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| PZS | Wheel 19 X 8, Aluminium, Design12 | — | Reference |
| PZT | Wheel 19 X 8.0, J, Aluminum, Design 7 | — | Reference |
| PZU | Wheel 19 X 8.0, J, Aluminum, Design 8 | — | Reference |
| PZV | Wheel 18 X 7, 5, Aluminum, Design15 | — | Reference |
| PZW | Wheel 18 X 7, 5, Aluminum, Design16 | — | Reference |
| PZX | 18 inch Bright Silver painted aluminum wheels | 2023 | GM sourced |
| PZY | Plate Skid FRT & Rear | — | Reference |
| PZZ | Underbody Skid Plate, AEV this code has more than one documented meaning — filter by year | 2026 | 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.