← 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 1–100 of 427 codes beginning with H. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| H01 | AXLE REAR, 3.07 RATIO | — | Provisional |
| H04 | P, RAX, M, AXLE REAR, 4.11 RATIO, SINGLE SPEED this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| H05 | AXLE REAR, 3.73 RATIO | — | Provisional |
| H06 | P, RAX, M, AXLE REAR, 4.63 RATIO, SINGLE-SPEED, 10,000 LBS | 1995 | Provisional |
| H08 | P, RAX, M, AXLE REAR, 15,000 LB (6,804 KG), DANA S150-S, SINGLE SPEED, 607 | — | GM sourced |
| H09 | P, RAX, M, AXLE REAR, 15,000 LB, DANA J175S, SINGLE SPEED | 1998 | GM sourced |
| H0K | Interior Trim Config Leather, Level 3, Cocoa/dune | — | Reference |
| H0T | Interior Trim Config Suede, Level 1, Jet Black/brownstone | — | Reference |
| H0U | Interior Trim Config Cloth, Level 2, Jet Black | — | Reference |
| H0V | Interior Trim Config Suede, Level 1, Jet Black/dk Titanium | — | Reference |
| H0W | Interior Trim Config Suede, Level 1, Jet Black | — | Reference |
| H0X | Interior Trim Config Cloth, Level 2, Jet Black/dk Titanium | — | Reference |
| H0Y | Interior Trim Config Leather, Level 1, Jet Black | — | Reference |
| H0Z | Interior Trim Config Cloth, Level 1, Jet Black/dk Titanium | — | Reference |
| H10 | P, RAX, M, AXLE REAR, 15,000 LB, EATON 15040S, SINGLE SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H11 | P, RAX, M, AXLE REAR, 19,000 LB, EATON 19050S, SINGLE SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H12 | P, RAX, M, AXLE REAR, 21,000 LB, EATON 21065S, SINGLE SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H13 | P, RAX, M, AXLE REAR, 23,000 LB, EATON 23070S, SINGLE SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H14 | P, RAX, M, AXLE REAR, 23,000 LB, ROCKWELL R-160, SINGLE SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H15 | P, RAX, M, AXLE REAR, 21,000 LB (9,526 KG), EATON 21060T, TWO SPEED, 607 | — | GM sourced |
| H16 | P, RAX, M, AXLE REAR, 15,000 LB, EATON 15040T, TWO SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H17 | P, RAX, M, AXLE REAR, 19,000 LB, EATON 19050T, TWO SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H18 | P, RAX, M, AXLE REAR, 21,000 LB, EATON 21065T, TWO SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H19 | P, RAX, M AXLE REAR, 23,000 LB, EATON 23070T, TWO SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H1K | P, HDL, R HEADLAMPS, DIM/DIP - DELETE | 1998 | GM sourced |
| H1M | P, HDL, R HEADLAMPS, TRAPEZOIDAL | 1987 | GM sourced |
| H1N | P, LOCAL, 0010058 | 1992 | GM sourced |
| H1O | P, LOCAL, 0010059 | 1992 | GM sourced |
| H1P | Interior Trim Config Leather, Level 1, Jet Black/mojave | — | Reference |
| H1Q | Interior Trim Config Leather, Level 1, Jet Black/dk Titanium | — | Reference |
| H1R | Interior Trim Config Leather, Level 1, Cocoa/choccachino | — | Reference |
| H1S | Interior Trim Config Leather, Level 2, Cocoa/choccachino | — | Reference |
| H1T | Jet Black Cloth | 2026 | GM sourced |
| H1U | Interior Trim Config Cloth, Level 1, Cocoa/lt Neutral | — | Reference |
| H1V | Interior Trim Config Leather, Level 1, Cocoa/lt Neutral | — | Reference |
| H1W | Interior Trim Config Leather, Level 2, Cocoa/lt Neutral | — | Reference |
| H1X | Interior Trim Config Leather, Level 2, Jet Black/sangria | — | Reference |
| H1Y | Interior Trim Config Leather, Level 2, Jet Black | — | Reference |
| H20 | P, RAX, M AXLE REAR, 23,000 LB, EATON 23080T, TWO SPEED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| H21 | P, RAX, M AXLE REAR, 12,000 LB, EATON 23060TR, TWO SPEED | 1998 | Provisional |
| H22 | P, RAX, M AXLE REAR, 14,000 LB, EATON 23060TR, TWO SPEED | 1998 | GM sourced |
| H23 | P, RAX, M AXLE REAR, 16,000 LB, EATON 23080TR, TWO SPEED | 1998 | GM sourced |
| H24 | P, RAX, M AXLE REAR, 23,000 LB, EATON 23060SR, SINGLE SPEED | 1998 | Provisional |
| H25 | P, RAX, M AXLE REAR, 23,000 LB (10,430 KG), EATON 23082T, TWO SPEED, 607 | — | GM sourced |
| H2B | Interior Trim Config Leather, Level 2, Twilight Blue/jet Black | — | Reference |
| H2C | Interior Trim Config Vinyl, Level 1, Jet Black/med. Titanium | — | Reference |
| H2D | Interior Trim Config Leather, Level 1, Jet Black/lt Platinum | — | Reference |
| H2E | Interior Trim Config Leather, Level 1, Jet Black/morello Red | — | Reference |
| H2F | Interior Trim Config Leather, Level 2, Brownstone/lt Platinum | — | Reference |
| H2G | Jet Black Vinyl | 2023 | GM sourced |
| H2H | Interior Trim Config Vinyl, Level 1, Jet Black/caramel Tan | — | Reference |
| H2J | P, STP, R STRIPE, BODY SIDE -GRADUATION DESIGN 'FLAMING' | 1998 | GM sourced |
| H2K | P, STP, R STRIPE, BODY SIDE -GRADUATION DESIGN 'HOT WAVE' | 1998 | GM sourced |
| H2L | P, STP, R STRIPE, BODY SIDE -GRADUATION DESIGN 'COOL WAVE' | 1998 | GM sourced |
| H2N | Interior Trim Config Leather, Level 2, Jet Black/caramel Tan | — | Reference |
| H2P | Interior Trim Config Leather, Level 2, Jet Black/lt Platinum | — | Reference |
| H2Q | Interior Trim Config Vinyl, Level 1, Jet Black /dk Ash | — | Reference |
| H2R | Interior Trim Config Cloth, Level 1, Jet Black/dk Ash | — | Reference |
| H2S | Interior Trim Config Cloth, Level 2, Jet Black/dk Ash | — | Reference |
| H2T | Interior Trim Config Cloth, Level 2, Cocoa/dune | — | Reference |
| H2U | Interior Trim Config Leather, Level 3, Jet Black | — | Reference |
| H2V | Interior Trim Config Leather, Level 3, Jet Black/dk Ash | — | Reference |
| H2W | Interior Trim Config Leather, Level 3, Jet Black/spice Red | — | Reference |
| H2X | Interior Trim Config Leather, Level 4, Jet Black | — | Reference |
| H2Y | Interior Trim Config Leather, Level 4, Cocoa/dune | — | Reference |
| H2Z | Interior Trim Config Cloth, Level 2, Var1, Jet Black | — | Reference |
| H30 | Headlamps Color Clear, Inside Chrome | — | Reference |
| H31 | Headlamps Color Clear, Inside Black | — | Reference |
| H33 | Headlamp Color Bezel, Cyber Gray | — | Reference |
| H34 | Headlamp Color Bezel, Blade Silver | — | Reference |
| H35 | Headlamp Color Bezel, Black | — | Reference |
| H37 | Headlamp Color Bezel, Techno Gray | — | Reference |
| H38 | Headlamp Color Clear, Inside Blade Black Chrome | — | Reference |
| H3A | Interior Trim Config Leather Var 1, Level 3, Cocoa/dune | — | Reference |
| H3B | Interior Trim Config Leather Var 1, Level 3, Jet Black | — | Reference |
| H3C | Interior Trim Config Leather Var 1, Level 3, Jet Black/dk Ash | — | Reference |
| H3M | P, STP, R STRIPE, BODY SIDE - TYPE 'A' | 1998 | GM sourced |
| H3N | P, STP, R STRIPE, BODY SIDE - TYPE 'B' | 1998 | GM sourced |
| H3P | P, STP, R STRIPE, BODY SIDE - TYPE 'C' | 1998 | GM sourced |
| H3Q | P, STP, R STRIPE, BODY SIDE - TYPE 'D' | 1998 | GM sourced |
| H3R | P, STP, R STRIPE, BODY SIDE -GRADUATION DESIGN 'HEDGEHOG' | 1998 | GM sourced |
| H3T | P, STP, R STRIPE, BODY SIDE -GRADUATION DESIGN 'HOT LIGHTNING' | 1998 | GM sourced |
| H3U | P, STP, R STRIPE, BODY SIDE -GRADUATION DESIGN 'COOL LIGHTNING' | 1998 | GM sourced |
| H40 | Headlamp Color Clear, Inside Blade Chrome | — | Reference |
| H45 | Appearance Package 45th Anniversary | — | Reference |
| H4D | Emissions Control,6-cylinder Spring Operated Efe,8-cylinder Cast Iron Exhaust Manifold | — | Reference |
| H4L | P, CCC, R COLOR COMBINATION, EXTERIOR, ALPINE WHITE/KAIZEN SILVER MET this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| H4M | P, CCC, R COLOR COMBINATION, EXTERIOR, RADIANT RED/KAIZEN SILVER MET | 1999 | GM sourced |
| H4N | P, CCC, R COLOR COMBINATION, EXTERIOR, ASTRAL SILVER/KAIZEN SILVER MET this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| H4P | P, CCC, R COLOR COMBINATION, EXTERIOR, TRITON BLUE/KAIZEN SILVER MET this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| H4Q | P, CCC, R COLOR COMBINATION, EXTERIOR, MARINA BLUE/KAIZEN SILVER MET this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| H4R | P, CCC, R COLOR COMBINATION, EXTERIOR, RANGER GREEN/KAIZEN SILVER MET this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| H4S | Interior Trim Config Leather, Level 3, Mink | — | Reference |
| H4T | P, SGR, R MERCHANDISED PKG, THUNDER SPECIAL EDITION | 1999 | GM sourced |
| H4U | P, SGR, R MERCHANDISED PKG, SPORT LUXURY | 1998 | GM sourced |
| H4V | Equipment Performance & Handling | — | Reference |
| H4W | Interior Trim Config Leather, Level 4, Cocoa / Dark Atmosphere | — | Reference |
| H4X | Interior Trim Config Leather, Level 4, Cocoa / Saddle Brown | — | Reference |
| H4Y | Interior Trim Config Leather, Level 4, Cocoa / Shale | — | Reference |
| H5D | Emissions Control,6-cylinder Vacuum Operated Efe,8-cylinder Stainless Steel Exhaust | — | 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.