GMC Sierra 2005 Owner's Manual page 515

Fuses
HTR A/C
LOCK (Relay)
HVAC 1
L DOOR
CRUISE
UNLOCK (Relay)
RR FOG LP
BRAKE
DRIVER UNLOCK
IGN 0
TBC IGN 0
VEH CHMSL
LT TRLR ST/TRN
Usage
Climate Control System
Power Door Lock Relay
(Lock Function)
Climate Control System
Driver's Door Harness
Connection
Cruise Control, Power Take
Off (PTO)
Power Door Lock Relay
(Unlock Function)
Not Used
Anti-Lock Brake System
Power Door Lock Relay
(Driver's Door Unlock
Function)
TCM
Truck Body Controller
Vehicle and Trailer High
Mounted Stoplamp
Left Turn Signal/Stop Trailer
Fuses
LT TRN
VEH STOP
RT TRLR ST/TRN
RT TRN
BODY
DDM
AUX PWR 2
LOCKS
ECC
TBC 2C
FLASH
CB LT DOORS
TBC 2B
TBC 2A
Usage
Left Turn Signals and
Sidemarkers
Vehicle Stoplamps, Brake
Module, Electronic Throttle
Control Module
Right Turn Signal/Stop Trailer
Right Turn Signals and
Sidemarkers
Harness Connector
Driver Door Module
Not Used
Power Door Lock System
Not Used
Truck Body Controller
Flasher Module
Left Power Windows Circuit
Breaker
Truck Body Controller
Truck Body Controller
5-121