GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Power, Ground and BCM


Object Number: 680720  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Hazard Switch, Radio, Instrument Panel Cluster (IPC) And Ground
B+ Bus Bar
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
Hazard Switch, Radio, Instrument Panel Cluster (IPC) And Ground
ILLUM and PARK LP Fuses
G200 and G201
SP203
Figure 2:

Hazard Switch, Radio, Instrument Panel Cluster (IPC) and Ground


Object Number: 680722  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Power, Ground and BCM
Power, Ground and BCM
SP203
G200 and G201
G202 and G204