GMC Cadillac CTS 2004 Owner's Manual page 395

Underhood Fuse Block
The underhood fuse block is located in the engine
compartment on the passenger's side of the vehicle.
See Engine Compartment Overview on page 5-12
for more information on location.
To access the fuses, push in the two tabs located on
each side of the fuse block cover. Then lift the cover off.
Relays
LO SPEED FAN
Low Speed Fan Motor
RELAY MINI
HI SPEED FAN
High Speed Fan Motor
RELAY MINI
ACCESSORY
Accessory Power Outlets
RELAY MINI
S/P FAN
Series/Parallel Fan
RELAY MINI
PARK LAMP
Parking Lamps
RELAY MICRO
Usage
5-101