GMC Sierra Classic 2007 Owner's Manual page 604

Auxiliary Electric Cooling Fan
Fuse Block
Lift the cover for access to the fuse/relay block.
604
The auxiliary electric
cooling fan fuse block is
located in the engine
compartment on
the driver's side of the
vehicle next to the
underhood fuse block.
Fuses
COOL/FAN Cooling Fan
COOL/FAN Cooling Fan Relay Fuse
COOL/FAN Cooling Fan Fuse
Relays
COOL/FAN 1 Cooling Fan Relay 1
COOL/FAN 3 Cooling Fan Relay 3
COOL/FAN 2 Cooling Fan Relay 2
Usage
Usage