GMC T Series Fuse Box: What Each Fuse Does
From the 2010 GMC T Series owner's manual. 1 fuse box listed.
Fuses
| Fuse | Circuit |
|---|---|
| 1 | Ignition Switch |
| 2 | Cigar Lighter, Radio, Meter |
| 3 | Engine Control Module, Ignition 1 |
| 4 | Transmission Control Module, Ignition, Chime |
| 5 | Assembly Line Data Link Connector |
| 6 | Warning Lamp, Ignition Relay, Blower Motor, Motor Relay, Auxiliary Relay, Power Window Relay, Interior Relay |
| 7 | Room Lamp, Horn, Electric Parking Brake, Radio Back Up, Rear Body Dome Lamp |
| 8 | Power Window |
| 9 | Exhaust Brake Back Up, Air Suspension Dump, Differential Lock, Air Dryer, Moisture Ejection Heater, Electric Air Compressor, Power Take Off |
| 10 | Ignition Power |
| 11 | Left Trailer Turn Lamp |
| 12 | Auxiliary (Ignition ON) |
| 13 | Auxiliary (Battery Direct) |
| 14 | Driver Side Headlamp |
| 15 | Passenger Side Headlamp |
| 16 | Headlamp |
| 17 | Heated Fuel |
| 18 | Meter Transmission Control Module |
| 19 | Identification Lamp, Marker Lamp, Tail Lamp, Lighted Mirror, Illumination Lamp |
| 20 | Cool Condenser Fan Motor, Cooler Compressor |
| 21 | Wiper Motor, Washer Motor |
| 22 | Heated Mirror, Two-Speed Axle Relay |
| 23 | Empty |
| 24 | Fan Motor, Air Conditioner Relay |
| 25 | Right Trailer Turn Lamp, Flasher Unit |
| 26 | Power Post (Consent) |
Source: owner's manual, PDF page 228.
Listings are copied as text from the manual's fuse tables (AI-assisted; every circuit name was matched against the cited pages 2026-10-18). Fuse layouts can differ by trim and year; check the label on the fuse box cover before replacing a fuse, and always use the same amp rating.
Confirm with your own manual, dipstick or door-jamb label.
Report a problem with this page →