GMC Yukon Owner's Manual page 556

Fuses
34 Sunroof
Key Ignition System, Theft Deterrent
35
System
36 Windshield Wiper
37 SEO B2 Upfitter Usage (Battery)
38 Electric Adjustable Pedals
39 Climate Controls (Battery)
40 Airbag System (Ignition)
41 Amplifier
42 Audio System
Miscellaneous (Ignition),
43
Cruise Control
44 Liftgate Release
45 Airbag System (Battery)
46 Instrument Panel Cluster
6-124
Usage Fuses
47 Not Used
48 Auxiliary Climate Control (Ignition)
Center High-Mounted
49
Stoplamp (CHMSL)
50 Rear Defogger
51 Heated Mirrors
52 SEO B1 Upfitter Usage (Battery)
Cigarette Lighter, Auxiliary Power
53
Outlet
Automatic Level Control Compressor
54
Relay
55 Climate Controls (Ignition)
Engine Control Module, Secondary
56
Fuel Pump (Ignition)
Usage