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| 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 751 codes beginning with K. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| K5Z | Provisions Aux Battery Tray | — | Reference |
| K60 | P, GEN, M GENERATOR, 100 AMP this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| K61 | P, GEN, M GENERATOR, 105 AMP, DUAL INTERNAL FAN, ENHANCED IDLE OUTPUT | 1996 | GM sourced |
| K62 | P, GEN, M GENERATOR, 105 AMP, DUAL INTERNAL FAN | 1993 | GM sourced |
| K63 | P, GEN, M GENERATOR, 110 AMP | 1996 | GM sourced |
| K64 | P, GEN, M GENERATOR, 115 AMP, 10201 E 1 | — | GM sourced |
| K65 | P, GEN, M GENERATOR, 105 AMP, DUAL this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| K66 | P, IGNITION SYSTEM, TRANSISTORIZED | 1984 | GM sourced |
| K67 | P, SRP, R STARTER, ENGINE, HEAVY DUTY this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| K68 | P, GEN, M GENERATOR, 105 AMP | 1984 | GM sourced |
| K69 | P, SPK, M KEY, ADDITIONAL IGNITION this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| K6L | Air filter, pollutant and fine dust | 2026 | GM sourced |
| K70 | Pulsair,air Injection Engine | — | Reference |
| K71 | P, LABEL, EMISSION, - DELETE | 1998 | GM sourced |
| K72 | P, EMS, M EMISSION SYSTEM, EXPORT, NON-CERTIFIED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| K73 | P, GEN, M GENERATOR, 70 AMP this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| K74 | Early Fuel Evaporation(delete) | — | Reference |
| K75 | P, EMS, M EMISSION SYSTEM, EXPORT | 1983 | GM sourced |
| K76 | Generator 125 Amp, Dual | — | Reference |
| K77 | P, GEN, M GENERATOR, 56 AMP | 1992 | GM sourced |
| K79 | P, GEN, M GENERATOR, 42 AMP this code has more than one documented meaning — filter by year | 1992 | GM sourced |
| K7A | Wireless Phone Charging | 2026 | GM sourced |
| K7D | Wireless charging, second row, portable device, dual | 2026 | GM sourced |
| K80 | Generator,92 Ampere | — | Reference |
| K81 | P, GEN, M GENERATOR, 66 AMP | 1984 | GM sourced |
| K82 | P, GEN, M GENERATOR, 75 AMP this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| K83 | P, GEN, M GENERATOR, 35 AMP | 1995 | Provisional |
| K85 | P, GEN, M GENERATOR, 37 AMP | 1992 | GM sourced |
| K88 | P, GEN, M GENERATOR, 45 AMP | 1995 | Provisional |
| K89 | P, GEN, M GENERATOR, 50 AMP | 1997 | Provisional |
| K90 | Generator,108 Ampere | — | Reference |
| K91 | P, GEN, M GENERATOR, 65 AMP this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| K92 | Generator,105 Ampere | — | Reference |
| K93 | P, GEN, M GENERATOR, 32 AMP | 1995 | Provisional |
| K94 | Engine Displacement,modulated | — | Reference |
| K95 | Engine Displacement,nonmodulated | — | Reference |
| K96 | P, GEN, M GENERATOR, 55 AMP this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| K97 | P, GEN, M GENERATOR, 80 AMP this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| K98 | P, GEN, M GENERATOR, 140 AMP, 57MM PULLEY | 1996 | GM sourced |
| K99 | P, GEN, M GENERATOR, 85 AMP this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| KA0 | Key Vehicle, Dual | — | Reference |
| KA1 | Seats, heated driver and front passenger | 2026 | GM sourced |
| KA2 | P, EBH, R HEATER ENG, BLOCK, 115V, 1500 WATT PHILLIPS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| KA3 | P, EBH, R HEATER ENG, BLOCK, 220V | 1997 | GM sourced |
| KA4 | P, EBH, R HEATER ENG, BLOCK, 120V, 1,000 WATT, CORD this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| KA5 | P, SWIVEL, SEAT | 1994 | GM sourced |
| KA6 | Seats, heated second row | 2026 | GM sourced |
| KA7 | P, HEATER, SEAT, FRT & RR | 1998 | GM sourced |
| KA8 | P, HEATER, DUCT, REAR SIDE DOOR | 1998 | Provisional |
| KA9 | P, HEATER, STEERING WHEEL | 1998 | GM sourced |
| KAA | P, KNO, R KNOB, TRANS CONT LEVER, WOOD, 818 E 0 | — | Provisional |
| KAB | P, FIN, R FLEET INCENTIVE, CSX TRANSPORTATION (-TRK CKGMST) | 1995 | GM sourced |
| KAC | P, FIN, R FLEET INCENTIVE, UNIFIED WESTERN GROCERS (C/H/W), 20320 | — | Provisional |
| KAD | P, KNO, R KNOB, TRANS CONT LEVER, SPORT, 818 E 0 | — | Provisional |
| KAE | P, KNO, R KNOB, TRANS SHIFT, SPORT, 818 E 0 | — | GM sourced |
| KAF | P, FIN, R FLEET INCENTIVE, DEVON ENERGY (-TRK CKST), 20801 | — | Provisional |
| KAG | P, FIN, R FLEET INCENTIVE, CALIFORNIA STATE AUTOMOBILE ASSOC (H/J/N/W/U-TRK CKGMLST), 223 | — | Provisional |
| KAH | Model Conversion Sri | — | Reference |
| KAI | P, FIN, R FLEET INCENTIVE, PORTLAND GENERAL ELECTRIC (TRK CKGMLST), 11121 | — | GM sourced |
| KAJ | P, FIN, R FLEET INCENTIVE, ABS CAR & TRUCK RENTAL (N/S/U/W-TRK G), 10807 | — | Provisional |
| KAK | P, FIN, R FLEET INCENTIVE, CROWNCEN MARKETING CO, DBA CROWN PETROLEUM, (H/J/N/W-TRK CK), 10730 | — | Provisional |
| KAL | P, FIN, R FLEET INCENTIVE, AIR PRODUCTS (W -TRK CK), 10806 | — | Provisional |
| KAM | P, FIN, R FLEET INCENTIVE, ACUITY A. MUTUAL INSURANCE COMPANY (W), 11002 | — | Provisional |
| KAN | P, FIN, R, FLEET INCENTIVE, WOLFINGTON, INC. (C-TRK CKGST), 21023 | — | GM sourced |
| KAO | Key,vehicle,dual | — | Reference |
| KAP | P, FIN, R, FLEET INCENTIVE, GRANGE MUTUAL CASUALTY (L/W-TRK ML), 11024 | — | Provisional |
| KAQ | P, FIN, R, FLEET INCENTIVE, HILLMAN FASTENER (H/K/N/W-TRK CKST), 11001 | — | Provisional |
| KAR | P, FIN, R, FLEET INCENTIVE, CAMPBELL SALES COMPANY (H/J/N/U/W), 20422 | — | Provisional |
| KAS | P, FIN, R, FLEET INCENTIVE, ROADWAY EXPRESS (W-TRK ST), 10608 | — | Provisional |
| KAT | P, FIN, R, FLEET INCENTIVE, PLINKINGTON (B/H/N/U/W-TRK CKGMLST), 10724 | — | Provisional |
| KAU | P, FIN, R, FLEET INCENTIVE, THE AMERICAN METER COMPANY (-TRK S/T), 1208 | — | Provisional |
| KAV | P, FIN, R, FLEET INCENTIVE, GUIDE ONE INSURANCE (U/W-TRK ST), 11031 | — | Provisional |
| KAW | P, FIN, R, FLEET INCENTIVE, FERRELL GAS COMPANIES (TRK CK) | 1999 | GM sourced |
| KAX | P, FIN, R, FLEET INCENTIVE, VERIZON COMMUNICATIONS (C/H/J/N/U-TRK CKGMLST), 10807 | — | Provisional |
| KAY | P, FIN, R, FLEET INCENTIVE, THE HANOVER COMPANY (W-TRK C/K), 20508 | — | Provisional |
| KAZ | P, FIN, R, FLEET INCENTIVE, THE WASHINGTON POST (J-TRK ST), 20129 | — | GM sourced |
| KB0 | P, NPC, M, CONVERSION NAME PLT, "500 SPECIAL SERIES" | 1999 | Provisional |
| KB1 | Exhaust Manifold,sheet Metal | — | Reference |
| KB2 | P, SWIVEL, SEAT, RH, 306 | — | GM sourced |
| KB3 | P, EBH, R, HEATER ENG, BLOCK, 115V, 1250 WATT this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| KB4 | P, CONTROL, REMOTE, HEATER, 404 E, 0 | — | Provisional |
| KB5 | P, CONTROL, ECM GRADE BRAKING, 10223 | — | GM sourced |
| KB6 | P, HEATER, SEAT, COOLING, FRT, 10209 E, 4 | — | GM sourced |
| KB7 | P, CONTROL, MANUAL SHIFT, AUTOMATIC TRANSMISSION | 1999 | GM sourced |
| KB8 | Head,aluminum | — | Reference |
| KB9 | P, CONTROL, ELECTRONIC, TRANS SHIFT | 1989 | GM sourced |
| KBA | P, FIN, R, FLEET INCENTIVE, COMMONWEALTH TELEPHONE (N-TRK CKGMLST), 11029 | — | Provisional |
| KBB | P, FIN, R, FLEET INCENTIVE, KONE, INC. (D/J/K/N/U/W-TRK CKGMLST), 20801 | — | Provisional |
| KBC | P, FIN, R, FLEET INCENTIVE, EDWARD HINES LUMBER CO. (H/N/W -TRK CKST), 20508 | — | Provisional |
| KBD | P, FIN, R, FLEET INCENTIVE, UNIVERSAL COMPUTER SYSTEMS (TRK GML), 11128 | — | Provisional |
| KBE | P, FIN, R, FLEET INCENTIVE, FBL LEASING SERVICES INC. (C/G/H/N/U/W-TRK CKMLST), 630 | — | Provisional |
| KBF | P, FIN, R, FLEET INCENTIVE, FARMERS GROUP, INC./ZURICH INSURANCE GROUP/DBA FIG LEASING (H/J/N/W-TRK CKGMLST), 20305 | — | Provisional |
| KBG | P, FIN, R, FLEET INCENTIVE, BELLSOUTH TELECOMMUNICATIONS (C/G/H/J/K/N/V/W -TRK CKGMLPST), 20611 | — | GM sourced |
| KBH | P, FIN, R, FLEET INCENTIVE, AMERICAN FREIGHTWAYS, INC (W-TRK CKMLST) | 1998 | GM sourced |
| KBI | P, FIN, R, FLEET INCENTIVE, WAYNE FARMS, LLC (W-TRK CKG), 20801 | — | Provisional |
| KBJ | P, FIN, R, FLEET INCENTIVE, DANA CORPORATION (B/C/D/G/H/K/N/U/W-TRK CKGMLST), 20918 | — | Provisional |
| KBK | P, FIN, R, FLEET INCENTIVE, ELIZABETH ARDEN (H/N/W), 10713 | — | Provisional |
| KBL | P, FIN, R, FLEET INCENTIVE, RYAN INCORPORATED EASTERN (-TRK CKST), 10329 | — | Provisional |
| KBM | P, FIN, R, FLEET INCENTIVE, SUPER SHUTTLE (K-TRK G), 20801 | — | Provisional |
| KBN | P, FIN, R, FLEET INCENTIVE, TEXAS FARM BUREAU (C/D/H/U/W-TRK CKGST), 20801 | — | Provisional |
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.