GMC Envoy Owner's Manual page 452

Fuses
37 Front Parking Lamps
38 Left Turn Signal
Heat Ventilation Air
39
Conditioning 1
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44 Heat Ventilation Air Conditioning
Usage Fuses
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0
48 Four-Wheel Drive
49 Blank
50 Truck Body Controller Ignition
51 Brakes
52 Truck Body Controller Run
Usage
5-109