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

Starting System: Gasoline Engines


Object Number: 764659  Size: FS
Master Electrical Component List
Starting System Description and Operation
Starting System: Diesel Engine
Battery, Auxiliary Battery, and Underhood Fuse/Relay Center
Ignition A, Ignition B Fuses, and Ignition Switch
G103 - 8.1L Engine
G103 - 4.3L, 5.0L, and 5.7L Engines
Figure 2:

Starting System: Diesel Engine


Object Number: 764660  Size: FS
Master Electrical Component List
Starting System Description and Operation
Charging System: Gasoline Engines
Starting System: Gasoline Engines
Battery, Auxiliary Battery, and Underhood Fuse/Relay Center
Ignition A, Ignition B Fuses, and Ignition Switch
G103 - 6.5L Diesel Engine
Figure 3:

Charging System: Gasoline Engines


Object Number: 764662  Size: FS
Master Electrical Component List
Charging System Description and Operation
Charging System: Diesel Engine
Starting System: Diesel Engine
Ignition A, Ignition B Fuses, and Ignition Switch
Indicators 1 of 2 - Gas
Gages Fuse
Battery, Auxiliary Battery, and Underhood Fuse/Relay Center
Figure 4:

Charging System: Diesel Engine


Object Number: 764664  Size: FS
Master Electrical Component List
Charging System Description and Operation
Charging System: Gasoline Engines
Gages Fuse
Ignition A, Ignition B Fuses, and Ignition Switch
Battery, Auxiliary Battery, and Underhood Fuse/Relay Center
Battery, Auxiliary Battery, and Underhood Fuse/Relay Center
Indicators 1 of 2 - Diesel