GMC Sierra 2018 Owner's Manual page 370

Fuses Usage
1 Trailer brake
2 Trailer battery
Fuses Usage
3 Antilock brake
system pump
Vehicle Care
Fuses Usage
4 Instrument
panel BEC 1
5 Passenger
motorized seat belt
6 4WD transfer case
electronic control
7 Electric park brake
8 Instrument
panel BEC 2
9 Driver motorized
seat belt
10 Rear window
defogger
11 Starter
12 Cooling fan 1
13 Cooling fan 2
14 Left trailer stop/
Turn signal lamps
15 Trailer parking
lamps
16 Trailer reverse
lamps
369