GMC 2006 Envoy Owner's Manual page 461

Fuses
Electrically-Controlled
1
Air 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,
7
Headlamp Washer
8 Active Transfer Case
9 Windshield Washer
10 Powertrain Control Module B
Usage Fuses
11 Fog Lamps
12 Stoplamp
13 Cigarette Lighter
14 Not Used
15 Electric Adjustable Pedals
16 Truck Body Controller, Ignition 1
17 Crank
18 Airbag
19 Trailer Electric Brake
20 Cooling Fan
21 Horn
22 Ignition E
23 Electronic Throttle Control
Usage
5-105