GMC 2009 Yukon XL Owner's Manual page 515

Fuses
1 Right Trailer Stop/Turn Lamp
Electronic Stability Suspension
2 Control, Automatic Level Control
Exhaust
3 Left Trailer Stop/Turn Lamp
4 Engine Controls
Usage
Fuses
Engine Control Module, Throttle
5
Control
6 Trailer Brake Controller
7 Front Washer
8 Oxygen Sensors
9 Antilock Brakes System 2
10 Trailer Back-up Lamps
11 Driver Side Low-Beam Headlamp
12 Engine Control Module (Battery)
Fuel Injectors, Ignition Coils
13
(Right Side)
Transmission Control Module
14
(Battery)
15 Vehicle Back-up Lamps
Passenger Side Low-Beam
16
Headlamp
17 Air Conditioning Compressor
18 Oxygen Sensors
19 Transmission Controls (Ignition)
20 Fuel Pump
21 Fuel System Control Module
22 Headlamp Washer
Usage
5-119