GMC Express 2011 Owner's Manual page 319

J Case Fuse Usage
1 ABS Motor
2 ABS Module
41 Spare
42 Trailer Wiring
43 Fan High
44 Starter Solenoid
Engine Control
45
Module/Powertrain
46 Spare
47 Fan Lo
74 Front Blower
Relay Usage
15 Run/Crank
37 Spare
38 Fuel Pump
39 Crank
Air Conditioning
40
Compressor
Vehicle Care
Relay Usage
48 Fan High
49 Powertrain
50 Spare
57 Fan Low
60 Fan Control
10-49