GMC 2007 Sierra - Manual (Page 603)

Device Usage
HDLR 2 Headliner Wiring Connector
BODY Body Wiring Connector
DEFOG Rear Defogger Relay
HDLNR 1 Headliner Wiring Connector 1
SPARE RELAY Not Used
CB SEAT
Driver and Passenger Seat
Module Circuit Breaker
CB RT DOOR
Right Power Windows Circuit
Breaker
SPARE Not Used
INFO
Infotainment Harness
Connection
Underhood Fuse Block
The underhood fuse block in the engine
compartment on the driver’s side of the vehicle
near the battery. Lift the cover for access to
the fuse/relay block.
To remove fuses hold the end of the fuse between
your thumb and index finger and pull straight out.
See Engine Compartment Overview on page 480
for more information on its location.
603