GMC 2004 Sierra 1500 Pickup Owner's Manual page 527

Fuses
RR Wiper
SEO ACCY
WS WPR
TBC ACCY
IGN 3
4WD
Usage
Not Used
Special Equipment Option
Accessory
Windshield Wipers
Truck Body Controller
Accessory
Ignition, Heated Seats
Four-Wheel Drive System,
Auxiliary Battery
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
LT TRN
VEH STOP
RT 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
Left Turn Signals and
Sidemarkers
Vehicle Stoplamps, Brake
Module, Electronic Throttle
Control Module
Right Turn Signal/Stop Trailer
5-127