GMC 1999 Envoy Owner's Manual page 306

Fuse/Circuit Usage
Breaker
A Not Used
B Not Used
1 Not Used
2 Cigarette Lighter, Data
Link Connector
6-56
Fuse/Circuit Usage
Breaker
3 Cruise Control Module and Switch,
Body Control Module, Heated Seats
4 Gages, Body Control Module,
Instrument Panel Cluster
5 Parking Lamps, Power Window
Switch, Body Control Module,
Ashtray Lamp
6 Steering Wheel Audio Control
Illumination
7 Headlamp Switch, Body Control
Module, Headlamp Relay
8 Courtesy Lamps, Battery Run
Protection
9 Not Used
10 Turn Signal
11 Cluster, Engine Control Module
12 Interior Lights
13 Auxiliary Power
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