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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 801–900 of 1,078 codes beginning with T. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| TQ8 | P, BAT, R, BATTERY, 640 CCA, 20114 | — | Provisional |
| TQ9 | P, BAT, R, BATTERY, BATTERY 520 CCA (DUAL), 20114 | — | Provisional |
| TQA | C, SGS, R, SEO VEHICLE, TAXI, SIGN, VERSION 1, 20523 E, 0 | — | Provisional |
| TQB | C, SGS, R, SEO VEHICLE, TAXI, SIGN, VERSION 2, 20523 E, 0 | — | Provisional |
| TQC | C, FLP, R, FLEET SALES, PENSKE GO# V0217, 20926 | — | GM sourced |
| TQD | C, FLP, R, FLEET SALES, PENSKE TRUCK LEASING GO#V1594, 21003 | — | Provisional |
| TQE | Indicator Daytime Running Lamp | — | Reference |
| TQF | C, FLP, R, FLEET SALES, SCHWANS GO#C1816 | 1999 | GM sourced |
| TQG | C, FLP, R, FLEET SALES, SCHWANS GO#C1819 | 1999 | GM sourced |
| TQH | C, FLP, R, FLEET SALES, SCHWANS GO#C1820 | 1999 | GM sourced |
| TQI | C, MET, R, METER, TAXI PROVISIONS, VERSION 1, 20521 E, 0 | — | GM sourced |
| TQJ | C, FLP, R, FLEET SALES, NIAGARA MOHAWK GO#S0749, 511 | — | Provisional |
| TQK | C, MET, R, METER, TAXI PROVISIONS, VERSION 2, 20521 E, 0 | — | Provisional |
| TQL | C, MET, R, METER, TAXI PROVISIONS, VERSION 3, 20521 E, 0 | — | Provisional |
| TQM | C, FLP, R, FLEET SALES, ALTEC POOL GO# 8186, 1023 | — | Provisional |
| TQN | C, MET, R, METER, TAXI PROVISIONS, VERSION 4, 20828 E, 0 | — | GM sourced |
| TQP | Fleet Sales Tennant Go# D0134 | — | Reference |
| TQQ | P, MNT, R, MOUNT, ROOF, SIGN, TAXI, VERSION 1, 20523 E, 0 | — | Provisional |
| TQR | P, MNT, R, MOUNT, ROOF, SIGN, TAXI, VERSION 2, 20523 E, 0 | — | GM sourced |
| TQS | C, MET, R, METER, TAXI, I/S RR VIEW MIRROR, 20523 E, 0 | — | GM sourced |
| TQT | Provisions Taxi, For Radio Transmitter | — | Reference |
| TQU | One Battery Delco 1151 12v Taper Post Maintenance Free | — | Reference |
| TQX | Fleet Incentive Mccarthy Tire Service (-trk Ckmlstv) | — | Reference |
| TQY | Fleet Sales Tennant Go#e2131 | — | Reference |
| TR0 | P, LAMP, INTR, ROOF, RR, COURTESY & DUAL READING | 1999 | GM sourced |
| TR1 | P, LAMP, TAIL & STOP this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| TR2 | P, LAMP, TURN SIGNAL, ENLARGED | 1989 | GM sourced |
| TR3 | P, GRL, R, GRILLE, RADIATOR, BODY COLOR, W/CHROME EMBLEM this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| TR4 | P, GRL, R, GRILLE, RADIATOR, BLACK, W/CHROME EMBLEM, 531 E, 5 | — | GM sourced |
| TR5 | P, LABEL, TIRE, TIRE PRESSURE, 914 | — | Provisional |
| TR6 | P, HEADLAMPS CONTROL, LEVELING SYSTEM, MANUAL this code has more than one documented meaning — filter by year | 1989 | GM sourced |
| TR7 | Headlamp control, automatic leveling system this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| TR8 | P, REFLECTOR, WARNING, DISABLED VEHICLE | 1994 | GM sourced |
| TR9 | auxiliary lighting package | 1990 | GM sourced |
| TRA | C, HLG, R, HANDLING CHARGE, GOVERMENT BILL OF LADING this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| TRB | P, GRL, R, GRILLE, RADIATOR, BODY COLOR | 1998 | GM sourced |
| TRD | P, LAMP PACKAGE, LUGG CARR, RF, RR CARGO, 20913 | — | Provisional |
| TRE | P, HLG, R, HANDLING CHARGE, FT WAYNE ASM TO FT WAYNE FLEET EQUIPMENT, ROANOKE,IN | 1998 | GM sourced |
| TRF | P, TIRES, FRT, RADIAL IDENTIFIER this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TRG | Trailer Camera Provisions this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| TRH | P, TSR, R TIRE SELECT REAR, BRAND CUSTOMER this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TRL | Family Code, Trailer Hitch | 1988 | GM dated |
| TRM | Family Code, Trim Combination | 1988 | GM dated |
| TRN | Family Code, Transmission | 1988 | GM dated |
| TRO | Auxiliary Trailer Camera, wired (LPO dealer-installed accessory) | 2026 | GM sourced |
| TRR | P, TIRES, RR, RADIAL IDENTIFIER this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TRS | 2010 Oem Engine Physical ID Trs & Production Number 12608868 | — | Reference |
| TRV | Lamp Intr, Roof, Rr, Courtesy & Single Reading | — | Reference |
| TRW | Provision for cab roof-mounted lamp/beacon, provides an instrument panel-mounted switch and electrical wiring | 2019 | Reference |
| TRZ | P, EQUIPMENT, AIR SHIFT TRANSMISSION this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| TS0 | P, FIN, R FLEET INCENTIVE, NICHOLS CONSTRUCTION (B/H/J/L/N/W-TRK CKGMST), 21009 | — | Provisional |
| TS1 | P, FIN, R FLEET INCENTIVE, STURGEON ELECTRIC (TRK CKGST), 10815 | — | Provisional |
| TS2 | P, FIN, R FLEET INCENTIVE, HOBART CORPORATION/PMI (U/W-TRK CKGMLST) this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TS3 | P, FIN, R FLEET INCENTIVE, EMPLOYERS MUTUAL COMPANY (H/N/W), 20801 | — | Provisional |
| TS4 | P, FIN, R FLEET INCENTIVE, KALIL BOTTLING (H/N/W-TRK CKGST), 11023 | — | Provisional |
| TS5 | Fleet Incentive Met Baking Company (-trk Ckgmp) | — | Reference |
| TS6 | P, LAMP, STOP, HIGH LEVEL | 1991 | GM sourced |
| TS7 | P, FIN, R FLEET INCENTIVE, AUTOMATIC DATA PROCESSING, INC. (J/N), 10914 | — | Provisional |
| TS8 | P, REFLECTOR, BODY SIDE | 1998 | GM sourced |
| TS9 | P, LAMP, STOP, HIGH LEVEL - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TSA | C, HLG, R HANDLING CHARGE, BALTIMORE ASSEMBLY TO ADSCOM/ARI this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TSB | Ship Thru, Produced in Arlington Assembly and shipped to Defender Supply Co. | 2026 | GM sourced |
| TSC | C, FLP, R FLEET SALES, STATE OF N. CAROLINA GO# C0444 | 1999 | GM sourced |
| TSD | C, FLP, R FLEET SALES, NATIONAL LEASE GO# C0438 this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| TSF | Family Code, Tire Select FRT | 1990 | GM dated |
| TSG | Battery 90 AH | — | Reference |
| TSH | Headlamps Control Steerable Headlights | — | Reference |
| TSK | P, TIRE SELECT, CUSTOMER, 1002 | — | Provisional |
| TSL | C, CCL, R SECONDARY COLOR, EXTERIOR, MACK RED, WE983, 309 | — | GM sourced |
| TSM | Identification Torsion Bar Suspension | — | Reference |
| TSN | C, HLG, R HANDLING CHARGE, BALTIMORE ASM TO TROY DESIGN & MFG AUBURN HILLS, MI AND RETURN TO T&B FLINT ASM | 1998 | GM sourced |
| TSP | P, LAMP PACKAGE, INTERIOR, CUSTOM, 20418 E, 0 | — | GM sourced |
| TSQ | P, LAMP PACKAGE, INTERIOR, DELUXE, 20419 E, 0 | — | GM sourced |
| TSR | Family Code, Tire Select RR | 1998 | GM dated |
| TSS | Merchandised Pkg Tony Stewart Series | — | Reference |
| TST | C, FLP, R FLEET SALES, SNAP ON TOOL | 1993 | GM sourced |
| TSU | C, CCU, M PRIMARY COLOR, EXTERIOR, MACK RED, WE983, 309 | — | GM sourced |
| TSV | Fleet Sales Verizon Go# A2673 | — | Reference |
| TSW | Fleet Sales Verizon Go# A2675 | — | Reference |
| TSY | Identification E85 Engine | — | Reference |
| TT0 | P, FIN, R FLEET INCENTIVE, AVECIA (F/H/W), 11012 | — | Provisional |
| TT1 | Fleet Incentive WE Care Project, Inc (h/u/w-trk Gm) | — | Reference |
| TT2 | P, HDL, R HEADLAMPS, DIRECTIONAL, HIGH INTENSITY DISCHARGE, LOW BEAM XENON, HIGH BEAM XENON/HALOGEN, 11128 E, 0 | — | GM sourced |
| TT3 | P, CIRCUIT BREAKERS | 1983 | GM sourced |
| TT4 | P, HDL, R HEADLAMPS, HALOGEN, 4 this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| TT5 | P, HDL, R HEADLAMPS, HALOGEN, 2 this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| TT6 | P, HDL, R HEADLAMPS, HIGH INTENSITY DISCHARGE | 1993 | GM sourced |
| TT7 | P, HDL, R HEADLAMPS, HIGH INTENSITY DISCHARGE, LH RULE OF ROAD | 1993 | GM sourced |
| TT8 | P, HDL, R HEADLAMPS, HIGH INTENSITY DISCHARGE, RH RULE OF ROAD | 1993 | GM sourced |
| TT9 | P, HDL, R HEADLAMPS, HIGH INTENSITY DISCHARGE, LH RULE OF ROAD,, JAPAN OPTICS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| TTA | Reflector Body Side, Frt, RR | — | Reference |
| TTC | P, NPC, M CONVERSION NAME PLT, "CHEVY", 20909 | — | Provisional |
| TTF | Family Code, Tire Tread FRT | 1998 | GM dated |
| TTN | P, PLT, R PLANT CODE, TARRYTOWN, NY, USA | 1997 | GM sourced |
| TTO | Radio Equipment Cooling System | — | Reference |
| TTQ | Spoiler Rr, Roof, Sport, Enlarged | — | Reference |
| TTR | Family Code, Tire Tread RR | 1998 | GM dated |
| TTS | Family Code, Tire Tread Spare | 1991 | GM dated |
| TTV | Spoiler Rr, Lid/liftgate, Sport | — | Reference |
| TTW | Headlamps Control Automatic On-off, Tunnel Detection | — | 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.