GMC 2007 Sierra 1500 Pickup Owner's Manual page 601

Fuses
RR WPR
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
LT DR
CRUISE
UNLCK (Relay)
RR FOG LP
BRAKE
DRIVER UNLCK
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
601