This article provides fuse box diagrams for GMC T-Series trucks (T6500, T7500, T8500) from 2003 to 2010. It shows where the fuse panels are located inside the vehicle and explains which fuse controls each component and relay.
Table of Contents
Cigar lighter (power outlet) fuse in the GMC T6500, T7500, T8500 is the fuse #2 in the Instrument panel fuse box.
Instrument Panel
Fuse Number
Circuits Protected
1
Ignition Switch
2
Cigarette Lighter
3
ECM Ignition 1
4
Truck Body Controller
5
ALDL Connector
6
Warning Lamp, Ignition Relay, Blower Motor, Motor Relay, Auxiliary Relay, Power Window Relay, INT 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
ECM Ignition Power
11
Trailer Turn (LH) Lamp
12
Auxiliary (Ignition ON)
13
Auxiliary (Battery Direct)
14
Headlamp (LH)
15
Headlamp (RH)
16
Headlamp
17
Heated Fuel
18
Meter Truck Body Controller
19
ID Lamp, Marker Lamp, Tail Lamp, Lighted Mirror, Illumination Lamp
