← 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 501–600 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 |
|---|---|---|---|
| KL1 | P, LBL, R, LANGUAGE LABEL, GREEK this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| KL2 | P, LBL, R LANGUAGE LABEL, NORWEGIAN | 1999 | GM sourced |
| KL3 | P, LBL, R LANGUAGE LABEL, DUTCH | 1999 | GM sourced |
| KL4 | P, LBL, R LANGUAGE LABEL, DANISH | 1999 | GM sourced |
| KL5 | P, MODIFICATION, ENGINE, NATURAL GAS | 1993 | GM sourced |
| KL6 | P, PROVISIONS, NATURAL GAS | 1993 | GM sourced |
| KL7 | P, CONVERSION, PROPANE GAS (LP GAS) | 1998 | GM sourced |
| KL8 | P, CONVERSION, NATURAL GAS (CNG GAS) | 1998 | GM sourced |
| KL9 | Automatic Stop/Start | 2026 | GM sourced |
| KLA | P, FIN, R FLEET INCENTIVE, HOME RUNS.COM INC, (TRK CKGST), 10521 | — | GM sourced |
| KLB | P, FIN, R FLEET INCENTIVE, HORIZON (BLUE CROSS & BLUE SHIELD OF NJ), (J/N/W), 512 | — | GM sourced |
| KLC | P, FIN, R FLEET INCENTIVE, BJ SERVICES INC. (W-TRK CKGST), 20912 | — | GM sourced |
| KLD | P, FIN, R FLEET INCENTIVE, AGA GAS, INC. (C/H/J/K/W-TRK CKMLST), 20515 | — | Provisional |
| KLE | P, FIN, R FLEET INCENTIVE, JR JURGENSEN (B/K/N/W-TRK CKGST), 20801 | — | Provisional |
| KLF | P, FIN, R FLEET INCENTIVE, GRUMA FOODS (C/D/G/H/W-TRK CKMLST), 20912 | — | Provisional |
| KLG | P, FIN, R FLEET INCENTIVE, SUNRISE COMMUNITY, INC. (N/W-TRK GST), 707 | — | Provisional |
| KLH | P, FIN, R FLEET INCENTIVE, STATE AUTO INSURANCE COMPANY (W), 707 | — | Provisional |
| KLI | P, FIN, R FLEET INCENTIVE, HOUSTON CONTRACTING COMPANY (TRK CK), 20228 | — | Provisional |
| KLJ | P, FIN, R FLEET INCENTIVE, VISTEON AUTOMOTIVE SYSTEM, INC. (D/H/K/N/U/W-TRK- GKGST), 20815 | — | Provisional |
| KLK | P, FIN, R FLEET INCENTIVE, CONSOLIDATED ENGINEERING SERVICES (N/W-TRK CKGMLST, 801 | — | Provisional |
| KLL | P, FIN, R FLEET INCENTIVE, ZOOTS (-TRK G), 726 | — | Provisional |
| KLM | P, FIN, R FLEET INCENTIVE, FLINT INK (G/K/W-TRK CKGST), 21030 | — | Provisional |
| KLN | P, FIN, R FLEET INCENTIVE, NORTWESTERN CORP. (C/H/J/K/N/U/W-TRK CKGMLST), 20104 | — | GM sourced |
| KLO | P, FIN, R FLEET INCENTIVE, MCELROY MELAL MILL, INC (W-TRK CKST), 20806 | — | Provisional |
| KLP | P, FIN, R FLEET INCENTIVE, COMPASS GROUP, INC (C/D/H/J/K/N/U/W-TRK CKGMLST), 21101 | — | Provisional |
| KLQ | P, FIN, R FLEET INCENTIVE, NEC BUSINESS SOLUTIONS (-TRK ML), 726 | — | Provisional |
| KLR | P, FIN, R FLEET INCENTIVE, RESORT RENT-A-CAR (W-TRK CK), 10119 | — | Provisional |
| KLS | P, FIN, R FLEET INCENTIVE, IBT (C/H/K/U/W-TRK CKST), 10910 | — | Provisional |
| KLT | P, FIN, R FLEET INCENTIVE, PENTAIR (C/G/H/K/N/U/W-TRK CKGMLST), 728 | — | Provisional |
| KLU | P, FIN, R FLEET INCENTIVE, HBE CORPORATION (W-TRK CK), 731 | — | Provisional |
| KLV | Fleet Incentive Swisher Hygiene Franchise Corporation | — | Reference |
| KLW | P, FIN, R FLEET INCENTIVE, WATKINS MOTOR LINES (W), 731 | — | Provisional |
| KLX | P, FIN, R FLEET INCENTIVE, GIANT EAGLE INC. (N/W), 731 | — | Provisional |
| KLY | P, FIN, R FLEET INCENTIVE, VALOR COMMUNICATIONS (N/U/W-TRK CKGMLST), 11001 | — | GM sourced |
| KLZ | P, FIN, R FLEET INCENTIVE, FORD DISTRIBUTING, INC. (TRK G), 20228 | — | Provisional |
| KM0 | P, FIN, R FLEET INCENTIVE, EAST CAROLINA FARM CREDIT (W-TRK CK), 10111 | — | Provisional |
| KM1 | P, FIN, R FLEET INCENTIVE, DEALER TIRE (TRK G), 11102 | — | Provisional |
| KM2 | P, FIN, R FLEET INCENTIVE, FIRST TRUCK & CAR RENTAL (G/J/N/U/W-TRK CKGMLST), 10608 | — | Provisional |
| KM3 | P, FIN, R FLEET INCENTIVE, BOEING SHARED SERVICES GROUP (D/H/K/U/W-TRK CKGML ST), 20912 | — | Provisional |
| KM4 | P, FIN, R FLEET INCENTIVE, AVIS RENT-A-CAR DE P.R.; INC. (J/N/U/W-TRK MLST), 525 | — | Provisional |
| KM5 | Glow System,slow Start | — | Reference |
| KM6 | Glow System,fast Start | — | Reference |
| KM7 | Manifold,intake(cast Iron) | — | Reference |
| KM8 | P, FIN, R FLEET INCENTIVE, CHARLIE CAR RENTAL/NCR (J/N/U/W-TRK CKGML), 10608 | — | Provisional |
| KM9 | P, FIN, R FLEET INCENTIVE, L & M CAR RENTAL (J/N/U/W-TRK GML), 623 | — | GM sourced |
| KMA | P, FIN, R FLEET INCENTIVE, BARGAIN AUTO RENTAL (J/N/W-TRK G) | 1999 | GM sourced |
| KMB | P, FIN, R FLEET INCENTIVE, INTEGRATED HEALTH SERVICES (TRK GMLST) | 1999 | GM sourced |
| KMC | P, FIN, R FLEET INCENTIVE, TOYOTA ELECTRONICS (N/W) | 1999 | GM sourced |
| KMD | P, FIN, R FLEET INCENTIVE, ROSEBURG FOREST PRODUCTS (W-TRK CK), 20218 | — | Provisional |
| KME | P, FIN, R FLEET INCENTIVE, SULLIVAN - SCHEIN DENTAL (TRK CKG), 10601 | — | Provisional |
| KMF | P, FIN, R FLEET INCENTIVE, DAY AND ZIMMERMAN, INC. (C/G/H/U/W-TRK CKGST), 10608 | — | Provisional |
| KMG | P, FIN, R FLEET INCENTIVE, MESSER & SONS CONSTRUCTION CO. (W-TRK CKST), 20221 | — | Provisional |
| KMH | P, FIN, R FLEET INCENTIVE, BUDGET RENT A CAR OF CENTRAL MARYLAND (B/H/J/N/U/W-TRK CKGST), 10126 | — | Provisional |
| KMI | P, FIN, R FLEET INCENTIVE, DUPONT SOURCING (B/C/H/N/S/U/W-TRK CKGMLST), 20611 | — | Provisional |
| KMJ | P, FIN, R FLEET INCENTIVE, FMC HEALTH SYSTEMS (U/W-TRK ML), 20812 | — | Provisional |
| KMK | P, FIN, R FLEET INCENTIVE, MCKENNEY'S INC (W-TRK CKGST), 11005 | — | Provisional |
| KML | P, FIN, R FLEET INCENTIVE, LAW ENGINEERING & ENVIRONMENTAL SERVICES, INC. (W-TRK CKGST), 11023 | — | Provisional |
| KMM | P, FIN, R FLEET INCENTIVE, KULP CAR RENTAL (J/S/U/W-TRK CKGML), 10820 | — | Provisional |
| KMN | P, FIN, R FLEET INCENTIVE, LEAR CORPORATION (D/G/H/N/W-TRK CKGST), 20918 | — | Provisional |
| KMO | P, FIN, R FLEET INCENTIVE, JAFRA COSMETICS (G/H/N/U/W-TRK CKST), 10226 | — | Provisional |
| KMP | P, FIN, R FLEET INCENTIVE, PDI (PROFESSIONAL DETAILING, INC) (W) | 1999 | GM sourced |
| KMQ | P, FIN, R FLEET INCENTIVE, COOK'S PEST CONTROL (J/W-TRK CKST) | 1999 | GM sourced |
| KMR | P, FIN, R FLEET INCENTIVE, COTTON STATES INSURANCE CO. (W-TRK CKST), 11005 | — | Provisional |
| KMS | P, FIN, R FLEET INCENTIVE, ALLIANT FOOD SERVICES (U/W-TRK GST), 203 | — | Provisional |
| KMT | P, FIN, R FLEET INCENTIVE, DYCOM INDUSTRIES (W-TRK CKGMLST), 10316 | — | Provisional |
| KMU | P, FIN, R FLEET INCENTIVE, KRAFT MAID CABINETRY (U-TRK CKST), 905 | — | Provisional |
| KMV | P, FIN, R FLEET INCENTIVE, U-HAUL DAILY RENTAL (TRK CKGMLST), 20122 | — | GM sourced |
| KMW | P, FIN, R FLEET INCENTIVE, GENERAL PARTS (H/U/W-TRK CKST) | 1999 | GM sourced |
| KMX | P, FIN, R FLEET INCENTIVE, RUG DOCTOR (U-TRK G), 20221 | — | Provisional |
| KMY | P, FIN, R FLEET INCENTIVE, FAULKNER GROUP (-TRK CK), 20221 | — | Provisional |
| KMZ | P, FIN, R FLEET INCENTIVE, NATIONAL GYPSOM GOLD BOND (H/W-TRK CKST), 10917 | — | Provisional |
| KN1 | P, FIN, R FLEET INCENTIVE, MORE AUTOMOTIVE PRD INC./ DBA DOLLAR RENT-A-CAR (J/N/U/W-TRK ML), 10621 | — | Provisional |
| KN2 | P, FIN, R FLEET INCENTIVE, OLYMPIC RENT-A-CAR (J/N/U/W-TRK ST), 10608 | — | Provisional |
| KN3 | P, FIN, R FLEET INCENTIVE, POPULAR LEASING & RENTAL (J/N/U/W-TRK CKGMST) | 1999 | GM sourced |
| KN4 | P, FIN, R FLEET INCENTIVE, PUERTO RICANCARS, INC./ DBA HERTZ RENT-A-CAR, (H/J/N/S/U/W-TRK ST), 20801 | — | Provisional |
| KN5 | P, FIN, R FLEET INCENTIVE, THRIFTY CAR RENTAL (D/J/N/U/W-TRK CKGMLST), 20409 | — | Provisional |
| KN6 | P, FIN, R FLEET INCENTIVE, PROGRESSIVE SERVICES, INC. (TRK CK), 20225 | — | Provisional |
| KN7 | P, FIN, R FLEET INCENTIVE, HORIZON RENT-A-CAR (B/H/J/N/U/W-TRK CKGMLST), 20422 | — | Provisional |
| KN8 | P, FIN, R FLEET INCENTIVE, TROPICAL CAR RENTAL (J/N-TRK M) this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| KN9 | P, FIN, R FLEET INCENTIVE, CATERPILLAR (H/W-TRK CKGST), 20801 | — | GM sourced |
| KNA | P, ACL, M AIR CLEANER, WET, 11126 | — | Provisional |
| KNB | P, ACL, M AIR CLEANER, DRY this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| KNC | P, FIN, R FLEET INCENTIVE, ROHM AND HAAS COMPANY (J/W-TRK CKST), 20918 | — | Provisional |
| KND | P, FIN, R FLEET INCENTIVE, EGAN COMPANIES (TRK CKG), 11108 | — | Provisional |
| KNE | P, FIN, R FLEET INCENTIVE, CROWN CORK & SEAL COMPANY, INC. (C/H), 20926 | — | Provisional |
| KNF | P, FIN, R FLEET INCENTIVE, HERCULES, INC. (U/W-TRK JST), 11128 | — | Provisional |
| KNG | P, FIN, R FLEET INCENTIVE, ICOS CORPORATION (U/W), 11108 | — | Provisional |
| KNH | P, FIN, R FLEET INCENTIVE, IP COMMUNICATIONS (TRK CKGMLST), 11108 | — | GM sourced |
| KNI | P, FIN, R FLEET INCENTIVE, NORTH AMERICAN ROOFING SYSTEMS, INC. (W-TRK CKGMLST), 20228 | — | Provisional |
| KNJ | P, FIN, R FLEET INCENTIVE, SERONO INC, (B/H/U/W-TRK CKST), 20801 | — | Provisional |
| KNL | P, FIN, R FLEET INCENTIVE, SUMITOMO MACHINERY CORPORATION OF AMERICA, (H/W), 20725 | — | Provisional |
| KNM | P, FIN, R FLEET INCENTIVE, SYNGENTA, INC (U/W-TRK CKST), 20801 | — | Provisional |
| KNO | FAMILY CODE, KNOB, 20214 | — | Provisional |
| KNP | Cooling, auxiliary external transmission oil cooler | 2026 | GM sourced |
| KNR | Cooling System Axle | — | Reference |
| KNU | Knob Trans Cont Lever, Jet Black | — | Reference |
| KO1 | P, FIN, R FLEET INCENTIVE, FLEET WASH (TRK CKG), 810 | — | Provisional |
| KO2 | P, FIN, R FLEET INCENTIVE, AVENTIS (C/D/G/H/J/K/N/U/W-TRK CKGMLST), 20912 | — | Provisional |
| KO3 | P, FIN, R FLEET INCENTIVE, ACE RENT A CAR (B/G/H/J/K/N/U/W-TRK CKGMLST), 20812 | — | Provisional |
| KO4 | P, FIN, R FLEET INCENTIVE, OLIVE CREST TREATMENT CENTERS (TRK GML), 20313 | — | 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.