← 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 302 codes beginning with 4. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| 4D2 | Wheel Spare 17 X 4.0, B, Aluminum, Design 1 | — | Reference |
| 4D3 | Tire Spare P225/55r17 SL 97w BW Hw4 Var 2 | — | Reference |
| 4D6 | Interior Trim Jet Black/vy DK Neutral | — | Reference |
| 4D7 | Interior Trim Jet Black/dk Ash | — | Reference |
| 4DA | Interior Trim Med Titanium/ Synergy Green | — | Reference |
| 4DF | Interior Trim Jet Black / Mojave | — | Reference |
| 4DG | Interior Trim Jet Black/dk Ash Grey | — | Reference |
| 4DL | Interior Trim Med Titanium / Torch Red | — | Reference |
| 4DM | Interior Trim Mojave / Berlin Blue | — | Reference |
| 4DP | Interior Trim Cocoa / Dune | — | Reference |
| 4DU | P, CCU, M, PRIMARY COLOR, EXTERIOR, ROYAL BLUE, 10330 E, 0 0, A | — | Provisional |
| 4DV | Interior Trim Jet Black/gold Sand | — | Reference |
| 4EB | Tire Spare this code has more than one documented meaning — filter by year | — | Reference |
| 4EC | C, SPT, R, TIRE SPARE, LT215/85R16/E BL R/ST ST TL HWY, 425 | — | GM sourced |
| 4ED | P, SPT, R, TIRE SPARE, LT215/85R16/E BL R/ST ST TL ALS this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| 4EE | Interior Trim Jet Black/dk Galvanized With Iced Blue Accent | — | Reference |
| 4EF | C, SPT, R, TIRE SPARE, LT215/85R16/E BW R/PE ST TL OOR (SEO), 425 | — | Provisional |
| 4EH | Interior Trim Urban/med Urban | — | Reference |
| 4EM | Interior Trim Jet Black / Twilight Blue | — | Reference |
| 4EN | Interior Trim Jet Black / Red Curry | — | Reference |
| 4EO | Interior Trim Mocha Natural / Jet Black | — | Reference |
| 4EP | Interior Trim Jet Black / Sangria | — | Reference |
| 4EQ | Interior Trim Medium Cashmere / Very Light Cashmere | — | Reference |
| 4ER | Interior Trim Jet Black / Vecchio | — | Reference |
| 4ES | Tire Spare P235/75r15 | — | Reference |
| 4ET | Interior Trim Jet Black/mojave/mojave | — | Reference |
| 4EU | P, CCU, M, PRIMARY COLOR, EXTERIOR, COLMAR BLUE, 10517 E, 0 0, A | — | Provisional |
| 4EV | Interior Trim Ebony / Twilight Blue | — | Reference |
| 4EX | Interior Trim Mink | — | Reference |
| 4EY | Interior Trim Cocoa / Saddle Brown | — | Reference |
| 4EZ | Interior Trim Cocoa / Dark Atmosphere | — | Reference |
| 4FB | P, SPT, R, TIRE SPARE, LT235/75R15/C BL R/PE ST TL ALS (SEO) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 4FC | Interior Trim Very DK Moon Rock/dk Moon Rock | — | Reference |
| 4FE | Interior Trim Dark Sport | — | Reference |
| 4FG | Interior Trim Light Luxury | — | Reference |
| 4FL | Package FL Option 4 this code has more than one documented meaning — filter by year | — | Reference |
| 4FM | Interior Trim Medium Cashmere / Light Neutral this code has more than one documented meaning — filter by year | — | Reference |
| 4FO | Interior Trim Black / Torch Red | — | Reference |
| 4FP | Interior Trim Platinum Jet Black | — | Reference |
| 4FQ | Interior Trim Choccachino | — | Reference |
| 4FU | P, CCU, M, PRIMARY COLOR, EXTERIOR, LEMANS GREEN, MICA, 10517 E, 0 0, A | — | Provisional |
| 4FY | Interior Trim Jet Black/indian Summer | — | Reference |
| 4G2 | Interior Trim Jet Black / Adrenaline Red | — | Reference |
| 4G4 | Interior Trim Mojave | — | Reference |
| 4G7 | Wheel Spare 17 X 4.0, B, Steel, Design 1 | — | Reference |
| 4GA | C, SPT, R, TIRE SPARE, P245/75R16-109S BW R/PE ST TL AT (SEO) | 1997 | GM sourced |
| 4GB | Interior Trim Jet Black/ Cobalt Red | — | Reference |
| 4GK | Tire Spare Lt245/75r16/e BW R/pe ST TL Oor 120q (seo) | — | Reference |
| 4GM | Tire Spare Lt265/70r18/e 124r BW At(seo) | — | Reference |
| 4GU | P, CCU, M, PRIMARY COLOR, EXTERIOR, CAPRI YELLOW, MICA, 10517 E, 0 0, A | — | Provisional |
| 4HA | C, SPT, R, TIRE SPARE, P235/75R15/X BL R/PE ST TL ALS (SEO) | 1997 | GM sourced |
| 4HF | Tire Spare Lt225/75r16/e BL R/pe ST Als (seo) | — | Reference |
| 4HH | C, SPT, R, TIRE SPARE, LT245/75R16/E BW R/PE ST TL ALS 120Q (SEO) this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 4HI | C, SPT, R, TIRE SPARE, LT225/75R16/E BW R/ST ST HWY this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 4HP | Tire Spare Lt225/75r16/d BL R/pe ST TL Als | — | Reference |
| 4HS | P, SPT, R, TIRE SPARE, LT225/75R16/D BW R/PE ST TL HWY | 1992 | GM sourced |
| 4HU | P, CCU, M, PRIMARY COLOR, EXTERIOR, YELLOW, (OPEL), 10607 E, 0 0, A | — | Provisional |
| 4HY | Package Hybrid Option (4) | — | Reference |
| 4IU | P, CCU, M, PRIMARY COLOR, EXTERIOR, TIZIAN RED (02) (OPEL), 10613 E, 0 0, A | — | Provisional |
| 4JP | Tire Spare P265/70r17-113s BW R/pe ST TL Oor (se0) | — | Reference |
| 4JQ | Tire Spare P265/70r17 SL 113 S BW AT (se0) | — | Reference |
| 4JU | P, CCU, M, PRIMARY COLOR, EXTERIOR, CHINESE BLUE, MET3, 20806 E, 0 0, A | — | Provisional |
| 4KU | P, CCU, M, PRIMARY COLOR, EXTERIOR, AZTEC GOLD II, MET2 (03), 10801 E, 0 0, A | — | Provisional |
| 4LS | Package LS Option 4 | — | Reference |
| 4LT | Package LT Option 4 | — | Reference |
| 4LU | P, CCU, M, PRIMARY COLOR, EXTERIOR, BRILLIANT YELLOW, 11017 E, 0 0, A | — | Provisional |
| 4LZ | Package LZ Option 4 | — | Reference |
| 4MU | P, CCU, M, PRIMARY COLOR, EXTERIOR, AIR BLUE, MICA, 20123 E, 0 0, A | — | Provisional |
| 4NU | P, CCU, M, PRIMARY COLOR, EXTERIOR, AMETHYST, MICA, 20123 E, 0 0, A | — | Provisional |
| 4OU | P, CCU, M, PRIMARY COLOR, EXTERIOR, LILAC, MET 2, 20123 E, 0 0, A | — | Provisional |
| 4PU | P, CCU, M, PRIMARY COLOR, EXTERIOR, PAPYRUS MICA, 20124 E, 0 0, A | — | Provisional |
| 4QU | P, CCU, M, PRIMARY COLOR, EXTERIOR, DIGITAL GREEN, MET 2, 20123 E, 0 0, A | — | Provisional |
| 4QY | Tire Spare 8.00r19.5/e BW R/st TL Hwy | — | Reference |
| 4RU | P, CCU, M, PRIMARY COLOR, EXTERIOR, SWITCH MICA, MICA, 21022 E, 0 0, A | — | Provisional |
| 4SA | Package Slt Option 1 | — | Reference |
| 4SB | Package Slt Option 2 | — | Reference |
| 4SC | Package Slt Option 3 | — | Reference |
| 4SD | Package Slt Option 4 | — | Reference |
| 4SE | Package Slt Option 5 | — | Reference |
| 4SF | Package Slt Option 6 | — | Reference |
| 4SS | Package SS Option 4 | — | Reference |
| 4TA | C, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST TL OOR (SEO) this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 4TD | C, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST TL ALS (SEO) | 1994 | GM sourced |
| 4TJ | C, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST ST TL OOR (SEO) | 1991 | GM sourced |
| 4TN | C, SPT, R, TIRE SPARE, 225/70R19.5/F BW R/ST ST TL HWY (SEO) this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| 4TU | P, SPT, R, TIRE SPARE, 8.00R19.5/F BW R/PE ST TL HWY (MICHELIN XZA) this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| 4TW | C, SPT, R, TIRE SPARE, 8.00R19.5/F BL R/PE ST TL OOR (GOODYEAR G133), (SEO) this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| 4TX | C, SPT, R, TIRE SPARE, 8.00R19.5/F BW R/PE ST TL HWY (SEO) | 1997 | GM sourced |
| 4UU | P, CCU, M, PRIMARY COLOR, EXTERIOR, PANORAMA BLUE, MICA, 20624 E, 0 0, A | — | Provisional |
| 4VH | Tire Spare P225/75r15 Ws2/gold R/pe ST TL Als | — | Reference |
| 4VK | C, SPT, R, TIRE SPARE, LT225/75R16/C BL R/PE ST TL ALS (SEO) | 1999 | GM sourced |
| 4VL | Package VL Option 4 | — | Reference |
| 4VU | Primary Color Exterior, Laser Red | — | Reference |
| 4WT | Package WT Option 4 | — | Reference |
| 4X8 | Instrument Panel,deluxe | — | Reference |
| 4XL | Package Cxl Option 4 | — | Reference |
| 4XS | Package Cxs Option 4 | — | Reference |
| 4YS | P, SPT, R, TIRE SPARE, LT215/75R15/C BW R/PE ST TL ALS | 1999 | GM sourced |
| 4YT | Tire Lt235/85r16-e, Steel Belted OR Radial B/w | — | Reference |
| 4Z1 | P, WHS, R, WHEEL SPARE, STORAGE NO TIRE | 1991 | 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.