GMC Envoy Owner's Manual page 446

Fuses
Electrically-Controlled Air
1
Suspension
Passenger's Side High-Beam
2
Headlamp
Passenger's Side Low-Beam
3
Headlamp
4 Back-Up Trailer Lamps
Driver's Side High-Beam
5
Headlamp
Driver's Side Low-Beam
6
Headlamp
Rear Window Washer, Headlamp
7
Washer
Usage Fuses
8 Active Transfer Case
9 Windshield Washer
10 Powertrain Control Module B
11 Fog Lamps
12 Stoplamp
13 Cigarette Lighter
14 Ignition Coils
15 Canister Vent
16 Truck Body Controller, Ignition 1
17 Crank
Usage
5-103