GMC 2007 Sierra - Manual (Page 601)

Fuses Usage
RR WPR Not Used
SEO ACCY
Special Equipment Option
Accessory
WS WPR Windshield Wipers
TBC ACCY
Truck Body Controller
Accessory
IGN 3 Ignition, Heated Seats
4WD
Four-Wheel Drive System,
Auxiliary Battery
Fuses Usage
HTR A/C Climate Control System
LOCK (Relay)
Power Door Lock Relay
(Lock Function)
HVAC 1 Climate Control System
LT DR
Driver’s Door Harness
Connection
CRUISE
Cruise Control, Power
Take Off (PTO)
UNLCK (Relay)
Power Door Lock Relay
(Unlock Function)
RR FOG LP Not Used
BRAKE Anti-Lock Brake System
DRIVER UNLCK
Power Door Lock Relay
(Driver’s Door Unlock
Function)
IGN 0 TCM
TBC IGN 0 Truck Body Controller
VEH CHMSL
Vehicle and Trailer High
Mounted Stoplamp
LT TRLR ST/TRN Left Turn Signal/Stop Trailer
601