GMC 2002 Sonoma Owner's Manual page 378

Fuse/Circuit Usage
Breaker
A Not Used
B Not Used
1 Not Used
2 Cigarette Lighter, Data Link
Connector
6-68
Fuse/Circuit Usage
Breaker
3 Cruise Control, Body Controls
TBC, Cruise Module, Cruise
Switch
4 Gages, Body Controls TBC,
Instrument Panel Cluster,
B+ Power
5 Parking Lamps, Power Window
Switch, TBC, Ashtray Lamp
6 Steering Wheel, Illumination
7 Headlamp Switch, Body Controls
TBC, Headlamp Relay
8 Courtesy Lamps, Inadvertent
Power Relay
9 HVAC Control Head
10 Turn Signal
11 Instrument Panel Cluster,
Engine Controls
12 Interior Illumination
13 Auxiliary Power