GMC Sierra 2015 Owner's Manual page 413

10-46 Vehicle Care
Micro Fuses Usage
(2 Pin)
29 Parking
Lamps, Left
30 Upfitter 3
31 Upfitter SW 4
32 Upfitter 4
33 Back-up Lamps
34 Engine Control
Module Ignition
35 Air Conditioning
Compressor Clutch
36 Heated Mirrors
37 Upfitter 1
38 Center
High-Mounted
Stoplamp
39 Miscellaneous
Ignition
Micro Fuses Usage
(2 Pin)
40 Transmission
Ignition
41 Fuel Pump 2
42 Cooling Fan Clutch
43 Engine
44 Fuel Injectors
A, Odd
45 Fuel Injectors
B, Even
46 Oxygen Sensor B
47 Throttle Control
48 Horn
49 Fog Lamp
50 Oxygen Sensor A
51 Engine Control
Module
52 Interior Heater
Micro Fuses Usage
(2 Pin)
53 Spare
54 Aeroshutter
55 Front Washer
Micro Fuses Usage
(3 Pin)
56 Air Conditioning
Compressor/
Battery Regulated
Voltage Control
57 Air Conditioning
Compressor
Module/
Battery Pack
58 Transmission
Control Module/
Engine Control
Module
59 Headlamps