← 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 101–200 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 |
|---|---|---|---|
| 48B | Trim Combination,med Emerald | — | Reference |
| 48C | Exterior Color,med Emerald | — | Reference |
| 48D | Trim Combination,med Emerald | — | Reference |
| 48E | Exterior Color,med Emerald | — | Reference |
| 48F | Trim Combination,med Emerald | — | Reference |
| 48H | Exterior Color,med Emerald this code has more than one documented meaning — filter by year | — | Reference |
| 48I | P, CCM, M, INTERIOR TRIM, MED DK CRYSTAL GREEN (97) (SATURN) this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| 48J | Trim Combination,med Emerald | — | Reference |
| 48L | P, CCL, R, SECONDARY COLOR, EXTERIOR, YELLOW GREEN, MICA (99) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 48Q | P, MCI, R, MOLDING COLOR, DK YELLOW GREEN MET (91) | 1990 | GM sourced |
| 48T | Top Color(elk Grain)(blk Emerald) | — | Reference |
| 48U | P, CCU, M, PRIMARY COLOR, EXTERIOR, CAPRICORN GREEN (02) HOLDENS, 20419 E, 8 this code has more than one documented meaning — filter by year | — | GM sourced |
| 492 | TRIM COMBINATION, LEATHER, MIDNIGHT SAGE (2) | — | Provisional |
| 494 | TRIM COMBINATION, LEATHER, MIDNIGHT SAGE (4) | — | Provisional |
| 49A | P, STC, R, STRIPE COLOR, ACCENT, TWO TONE, BLACK/SILVER (93) this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| 49B | Trim Combination,midnight Sage | — | Reference |
| 49C | Exterior Color,midnite Sage | — | Reference |
| 49D | Exterior Color,midnite Sage | — | Reference |
| 49E | Exterior Color,midnite Sage | — | Reference |
| 49H | Exterior Color,midnite Sage | — | Reference |
| 49I | Interior Trim Ebony/saddle Brown | — | Reference |
| 49L | P, CCL, R, SECONDARY COLOR, EXTERIOR, KIWI METALLIC M2 (00) OPEL this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 49P | P, WHC, R, WHEEL COLOR, LT BLUE MET (94) | 1993 | Provisional |
| 49Q | P, MCI, R, MOLDING COLOR, EXTERIOR, LT SANDRIFT MET (96) | 1993 | GM sourced |
| 49S | Stitching Color Indian Summer | — | Reference |
| 49T | P, VRC, R, TOP COLOR, LT SANDRIFT MET (96) | 1993 | GM sourced |
| 49U | P, CCU, M, PRIMARY COLOR, EXTERIOR, LT SANDRIFT MET (02), 20419 E, 3 this code has more than one documented meaning — filter by year | — | GM sourced |
| 4A0 | Interior Trim Jet Black/spice Red | — | Reference |
| 4A4 | Interior Trim Jet Black/dark Pewter | — | Reference |
| 4A5 | Interior Trim Jet Black/shale | — | Reference |
| 4A7 | Interior Trim Urban/ LT Urban | — | Reference |
| 4A8 | Interior Trim Onyx / Light Urban | — | Reference |
| 4A9 | Interior Trim Onyx / Redhot | — | Reference |
| 4AA | Interior Trim Jet Black | — | Reference |
| 4AB | Interior Trim Cocoa | — | Reference |
| 4AC | Interior Trim Cocoa/lt Cashmere | — | Reference |
| 4AF | Interior Trim Brownstone/shale | — | Reference |
| 4AG | Interior Trim Cool | — | Reference |
| 4AH | Interior Trim DK Titanium/lt Titanium | — | Reference |
| 4AI | Interior Trim Jet Black/brownstone | — | Reference |
| 4AJ | Interior Trim Jet Black/dk Titanium | — | Reference |
| 4AL | Interior Trim Ebony/ebony | — | Reference |
| 4AM | Interior Trim Ebony/lt Titanium | — | Reference |
| 4AP | Interior Trim Jet Black/lt Titanium | — | Reference |
| 4AQ | Interior Trim Very DK Pewter | — | Reference |
| 4AR | Interior Trim Ebony/lt Cashmere | — | Reference |
| 4AU | P, CCU, M, PRIMARY COLOR, EXTERIOR, SILVER LIGHTNING , MET 2, 10316 E, 0 0, A | — | GM sourced |
| 4AV | Interior Trim Jet Black/med Titanium | — | Reference |
| 4AW | Interior Trim Jet Black/lt Neutral | — | Reference |
| 4AX | Interior Trim Jet Black/inferno Orange | — | Reference |
| 4AY | Interior Trim Med DK Neutral/lt Neutral | — | Reference |
| 4AZ | Interior Trim Jet Black/ocean | — | Reference |
| 4B2 | Interior Trim Onyx / Turismo Rosso | — | Reference |
| 4B3 | Interior Trim Jet Black/synergy Green | — | Reference |
| 4B4 | Interior Trim Jet Black/ceramic White | — | Reference |
| 4B5 | Interior Trim Jet Black/cutgrass Met | — | Reference |
| 4B6 | Interior Trim Jet Black/dk Titanium/frosted Nickel | — | Reference |
| 4B8 | Interior Trim Cocoa / Shale | — | Reference |
| 4B9 | Interior Trim Jet Black/saddle Brown | — | Reference |
| 4BA | Interior Trim Onyx / Razor | — | Reference |
| 4BB | Interior Trim Onyx | — | Reference |
| 4BC | Interior Trim Two Tone - Very Dark Ash Grey/dark Ash Grey | — | Reference |
| 4BE | Tire Spare Lt235/75r15c WL R/pe ST TL Oor | — | Reference |
| 4BF | Interior Trim Ebony/lt Gray | — | Reference |
| 4BG | Interior Trim MD DK Cashmere/lt Cashmere | — | Reference |
| 4BH | Interior Trim Ebony/tango Red | — | Reference |
| 4BJ | Interior Trim Jet Black/lt Gray | — | Reference |
| 4BK | Interior Trim Jet Black/lt Cashmere | — | Reference |
| 4BL | P, SPT, R, TIRE SPARE, LT265/75R16-120Q RWL R/PE ST TL AT this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 4BM | C, SPT, R, TIRE SPARE, LT245/75R16/E RWL R/PE ST TL AT 120Q this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| 4BN | C, SPT, R, TIRE SPARE, LT245/75R16/C BL R/PE ST TL OOR (SEO), 20308 | — | GM sourced |
| 4BO | Interior Trim Cocoa/light Neutral | — | Reference |
| 4BR | Tire Spare Lt215/85r16/d BW R/pe ST TL Als | — | Reference |
| 4BU | P, CCU, M, PRIMARY COLOR, EXTERIOR, SATURN BLUE, MICA, 10316 E, 0 0, A | — | Provisional |
| 4BW | Interior Trim, Two Tone - Very Dark Ash Grey/shale | — | Reference |
| 4BX | Interior Trim LT Titanium | — | Reference |
| 4BZ | Interior Trim Ebony / Saffron | — | Reference |
| 4C1 | Interior Trim Jet Black / Light Platinum | — | Reference |
| 4C2 | Interior Trim Brownstone/light Platinum | — | Reference |
| 4C5 | Interior Trim Cocoa/dark Adriatic | — | Reference |
| 4C6 | Interior Trim Cocoa/saddle UP | — | Reference |
| 4C7 | Interior Trim Jet Black/saddle UP | — | Reference |
| 4C8 | Interior Trim Med Titanium/jet Black | — | Reference |
| 4C9 | Interior Trim Jet Black/mohave | — | Reference |
| 4CA | Interior Trim Jet Black/med Cashmere | — | Reference |
| 4CC | Interior Trim Jet Black/frosted Nickel | — | Reference |
| 4CE | Tire Spare P205/75r15/n BL R/pe ST TL Als Seo | — | Reference |
| 4CF | P, SPT, R, TIRE SPARE, P205/75R15/N RWL R/PE ST TL ALS (SEO) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| 4CG | Interior Trim Jet Black/light Neutral this code has more than one documented meaning — filter by year | — | Reference |
| 4CH | Interior Trim Urban | — | Reference |
| 4CJ | Interior Trim Urban / Dark Titanium | — | Reference |
| 4CR | Interior Trim Jet Black/morello Red | — | Reference |
| 4CS | Interior Trim Jet Black/dark Galvanized | — | Reference |
| 4CT | Interior Trim Cocoa / Choccocino | — | Reference |
| 4CU | Interior Trim Urban / Light Platinum this code has more than one documented meaning — filter by year | — | Reference |
| 4CW | Interior Trim Jet Black/caramel Tan | — | Reference |
| 4CX | Package CX Option 4 | — | Reference |
| 4CY | Interior Trim DK Urban/cocoa/v LT Platinum | — | Reference |
| 4CZ | Interior Trim Jet Black/lt Wheat | — | Reference |
| 4D1 | Interior Trim Twilight Blue / Jet Black | — | 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.