← 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 353 codes beginning with J. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| JC8 | P, BRK, M, BRAKE, POWER, DISC/DISC, 20,000 LBS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| JC9 | P, BRK, M, BRAKE, HYDRAULIC POWER, 17" DISC/DISC, W/VSES, 7700 LBS, 20417 | — | Provisional |
| JCA | Merchandised Pkg Chevrolet Aveo 'ls' this code has more than one documented meaning — filter by year | — | Reference |
| JCB | Merchandised Pkg Pontiac Wave 'lt' | — | Reference |
| JCC | Merchandised Pkg Chevrolet Optra 'ls' | — | Reference |
| JCD | Merchandised Pkg Chevrolet Epica 'ls' | — | Reference |
| JCE | Merchandised Pkg Chevrolet Epica 'lt' | — | Reference |
| JD1 | P, BRK, M, BRAKE, VAC POWER, 17" DISC/DISC, W/4WAL, 6800 LBS, 20205 | — | Provisional |
| JD2 | P, BRK, M, BRAKE, VAC POWER, 17" DISC/DISC, W/RWAL, 7700 LBS, 20205 | — | Provisional |
| JD3 | P, BRK, M, BRAKE, VAC POWER, 17" DISC/DISC, W/4WAL, 7700 LBS, 20205 | — | GM sourced |
| JD4 | P, BRK, M, BRAKE, ELECTRO HYDRAULIC APPLY, 17" DISC/DISC, W/VSES, 6800 LBS, 20205 | — | Provisional |
| JD5 | P, BRK, M, BRAKE, DUAL POWER, DISC/DRUM, 6,400 LBS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| JD6 | P, BRK, M, BRAKE, HYD POWER, DISC/DRUM, 7,200 LBS | 1998 | GM sourced |
| JD7 | P, BRK, M, BRAKE, HYD POWER, DISC/DRUM, 8,400 LBS | 1998 | GM sourced |
| JD8 | P, BRK, M, BRAKE, VAC POWER, 17" DISC/DISC, W/VSES, 6800 LBS, 20416 | — | Provisional |
| JD9 | Brakes, 4-wheel antilock, 4-wheel disc, VAC power with Brake Assist | 2019 | Reference |
| JDE | P, APP, R, APPEARANCE PACKAGE, JIMMY "DIAMOND EDITION" this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| JE0 | P, BRK, M, BRAKE, ELECTRO HYDRAULIC APPLY FRT & RR ELECTRIC WITH BLENDED REGENERATIVE BRAKING | 1995 | GM sourced |
| JE1 | P, BKS, M, BRAKE SYSTEM, EUROPE this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| JE2 | P, BRAKE LINING, PERFORMANCE DRIVING, 1121 E, 4 | — | GM sourced |
| JE3 | P, BRK, M, BRAKE, HYD this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| JE4 | P, BRK, M, BRAKE, AIR this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| JE5 | P, BKS, M, BRAKE SYSTEM, PWR, ANTILOCK, FRT & RR WHL | 1992 | GM sourced |
| JE6 | P, BRK, M, BRAKE, AIR OVER HYDRAULIC | 1994 | GM sourced |
| JE7 | P, BRK, M, BRAKE, HYDRAULIC POWER, 17' DISC/DISC, W/4WAL, 6800 LBS, 20212 | — | Provisional |
| JE8 | P, BRK, M, BRAKE, HYDRAULIC POWER, 17' DISC/DISC, W/4WAL, 7700 LBS, 20212 | — | Provisional |
| JE9 | P, BRK, M, BRAKE, HYDRAULIC POWER, 17' DISC/DISC, W/VSES, 6800 LBS, 20417 | — | Provisional |
| JF0 | Pedals Additional Brake | — | Reference |
| JF1 | P, BRK, M, BRAKE, ELECTRO HYDRAULIC, 20219 | — | Provisional |
| JF2 | P, BRK, M, BRAKE, DISC, VENTILATED, 20219 | — | GM sourced |
| JF3 | vacuum-assisted ABS front-disc/rear-drum brakes for 7,000-lb class | 2007 | GM sourced |
| JF4 | PEDALS - Power-adjustable for accelerator and brake | 2020 | GM sourced |
| JF5 | P, PEDALS, SPORTY, ALLOY, 1106 E, 0 | — | GM sourced |
| JF6 | Pedals Additional Brake & Clutch | — | Reference |
| JF7 | P, BRK, M, BRAKE, VAC POWER, 17" DISC/DRUM, W/ABS, 6,400 LBS, 20927 | — | GM sourced |
| JF8 | P, BRK, M, BRAKE, VAC POWER, 4 WHL DISC this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| JF9 | P, BRK, M, BRAKE, HYD POWER, 4 WHL DISC this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| JFA | Brake Parking,foot Apply | — | Reference |
| JFF | GVW Rating 10,100 Lbs | — | Reference |
| JFG | GVWR, 10,200 lbs. (4627 kg) | 2026 | GM sourced |
| JFH | GVWR, 10,300 lbs. (4672 kg) | 2026 | GM sourced |
| JFI | GVW Rating 10, 400 Lbs | — | Reference |
| JFJ | GVWR, 10,600 lbs. (4808 kg) | 2026 | GM sourced |
| JFK | GVWR, 10,700 lbs. (4854 kg) | 2026 | GM sourced |
| JFL | GVWR, 10,800 lbs. (4899 kg) | 2026 | GM sourced |
| JFM | GVWR, 10,900 lbs. (4944 kg) | 2026 | GM sourced |
| JFN | GVWR, 11,100 lbs. (5035 kg) | 2026 | GM sourced |
| JFO | GVWR, 11,200 lbs. (5080 kg) | 2026 | GM sourced |
| JFP | GVWR, 11,300 lbs. (5126 kg) | 2026 | GM sourced |
| JG0 | Brake Disc, Ventilated, Type II | — | Reference |
| JG1 | P, SHAFT, PROP, ALUMINUM | 1986 | GM sourced |
| JG2 | P, SHAFT, PROP, METAL MATRIX COMPOSITE | 1997 | GM sourced |
| JG4 | Brake Vac Power, 17' Disc/drum, 6,400 Lbs | — | Reference |
| JG7 | P, BRK, M, BRAKE, HYD POWER, 17" DISC/DRUM, 6,400 LBS, 20528 | — | Provisional |
| JGA | GVWR, 10,150 lbs. (4604 kg) | 2026 | GM sourced |
| JGB | GVWR, 10,250 lbs. (4649 kg) | 2026 | GM sourced |
| JGC | GVWR, 10,350 lbs. (4695 kg) | 2026 | GM sourced |
| JGD | GVWR, 10,450 lbs. (4740 kg) | 2026 | GM sourced |
| JGE | GVWR, 10,550 lbs. (4785 kg) | 2026 | GM sourced |
| JGF | GVWR, 10,650 lbs. (4831 kg) | 2026 | GM sourced |
| JGG | GVWR, 10,750 lbs. (4876 kg) | 2026 | GM sourced |
| JGH | GVWR, 10,850 lbs. (4921 kg) | 2026 | GM sourced |
| JGJ | GVWR, 11,050 lbs. (5012 kg) | 2026 | GM sourced |
| JGK | GVWR, 11,150 lbs. (5058 kg) | 2026 | GM sourced |
| JGL | GVWR, 11,350 lbs. (5148 kg) | 2026 | GM sourced |
| JGM | GVWR, 11,450 lbs. (5194 kg) | 2026 | GM sourced |
| JGN | GVWR, 11,550 lbs. (5239 kg) | 2026 | GM sourced |
| JGP | GVWR, 11,750 lbs. (5330 kg) | 2026 | GM sourced |
| JGQ | GVWR, 11,800 lbs. (5352 kg) | 2026 | GM sourced |
| JGR | GVWR, 11,850 lbs. (5375 kg) | 2026 | GM sourced |
| JGS | GVWR, 12,150 lbs. (5511 kg) | 2026 | GM sourced |
| JGT | GVWR, 12,250 lbs. (5557 kg) | 2026 | GM sourced |
| JH1 | hydraulic-power four-wheel disc brakes for 6,400-lb class | 2007 | GM sourced |
| JH2 | P, BRK, M, BRAKE, HYD POWER, DISC/DISC, 7,200 LBS, 1016 | — | GM sourced |
| JH3 | P, BRK, M, BRAKE, HYD POWER, 4 WHL DISC, 5,500 LBS | 1994 | GM sourced |
| JH4 | P, BRK, M, BRAKE, HYD POWER, 4 WHL DISC, 9,500 LBS | 1999 | GM sourced |
| JH5 | P, BRK, M, BRAKE, HYD POWER, 4 WHL DISC, 7,300 LBS, 10921 E, 4 | — | GM sourced |
| JH6 | hydraulic-power four-wheel disc brakes for 9,900-lb class | 2007 | GM sourced |
| JH7 | hydraulic-power four-wheel disc brakes for 12,300-lb class | 2007 | GM sourced |
| JH8 | P, BRK, M, BRAKE, HYD POWER, 4 WHL DISC, 16,500 LBS | 1994 | GM sourced |
| JH9 | P, BRK, M, BRAKE, HYD POWER, 4 WHL DISC, 12,300 LBS this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| JHA | Handle Hood Chrome | — | Reference |
| JHB | Latch Hood, Chrome | — | Reference |
| JHD | Hill Descent Control | 2026 | GM sourced |
| JJ2 | Brake Lining Brake Noise And Dust Performance | — | Reference |
| JJA | P, PTS, M, PT DRESS SUBASSEMBLY, INSTALLED (MODULAR OPTIMIZATION METHOD ONLY), 10917 E, 1 | — | GM sourced |
| JJB | P, PTS, M, PT DRESS SUBASSEMBLY, NOT INSTALLED (MODULAR OPTIMIZATION METHOD ONLY), 11019 E, 1 | — | GM sourced |
| JJC | P, IPA, M, I/P SUBASSEMBLY, INSTALLED (MODULAR OPTIMIZATION METHOD ONLY), 11019 E, 1 | — | GM sourced |
| JJD | P, IPA, M, I/P SUBASSEMBLY, NOT INSTALLED (MODULAR OPTIMIZATION METHOD ONLY), 11019 E, 1 | — | GM sourced |
| JJE | P, LGS, M, LIFTGATE SUBASSEMBLY, INSTALLED (MODULAR OPTIMIZATION METHOD ONLY), 11109 E, 4 | — | Provisional |
| JJF | P, LGS, M, LIFTGATE SUBASSEMBLY, NOT INSTALLED (MODULAR OPTIMIZATION METHOD ONLY), 11109 | — | Provisional |
| JJG | FRT End Subassembly Installed (modular Optimization | — | Reference |
| JJJ | Suspension Front Installed (modular Optimization Method Only) | — | Reference |
| JJK | Suspension Rear Installed (modular Optimization Method Only) | — | Reference |
| JJL | Suspension Front Not Installed (modular Optimization Method Only) | — | Reference |
| JJM | Suspension Rear Not Installed (modular Optimization Method Only) | — | Reference |
| JJP | Module FRT Vertical Installed (modular Optimization Method Only) | — | Reference |
| JJR | Console FRT Flr Installed (modular Optimization Method Only) | — | Reference |
| JJS | Console FRT Flr Not Installed (modular Optimization Method Only) | — | Reference |
| JJT | Headliner Subassembly Installed (modular Optimization Method Only) | — | 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.