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

Starting


Object Number: 896116  Size: FS
Master Electrical Component List
Starting System Description and Operation
Charging
G104
B+ Bus
Ignition Switch - START, RUN/START, and OFF/RUN/START Bus Bars
B+ Bus
Figure 2:

Charging


Object Number: 896120  Size: FS
Master Electrical Component List
Charging System Description and Operation
Starting
B+ Bus
Data Link Connector (DLC) Schematics