GMC 2009 Sierra User Manual
Page 427
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J-Case Fuses
Usage
57
Cooling Fan 1
58
Not Used
59
Heavy Duty Antilock Brake System
60
Cooling Fan 2
61
Antilock Brake System 1
62
Starter
63
Stud 2 (Trailer Brakes)
64
Left Bussed Electrical Center 1
65
Not Used
66
Heated Windshield Washer System
67
Four-Wheel Drive System
68
Stud 1 (Trailer Connector
Battery Power)
(Optional - 40A Fuse Required)
69
Mid-Bussed Electrical Center 1
70
Climate Control Blower
72
Not Used
73
Left Bussed Electrical Center 2
Relays
Usage
FAN HI
Cooling Fan High Speed
FAN LO
Cooling Fan Low Speed
ENG EXH VLV
Not Used
FAN CNTRL
Cooling Fan Control
HDLP LO/HID
Low-Beam Headlamp
FOG LAMP
Front Fog Lamps
A/C CMPRSR
Air Conditioning Compressor
STRTR
Starter
PWR/TRN
Powertrain
FUEL PMP
Fuel Pump
PRK LAMP
Parking Lamps
REAR DEFOG
Rear Defogger
RUN/CRANK
Switched Power
5-115
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