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

Power, Ground and Data Communication
Object Number: 1976375 Size: FS
Master Electrical Component List
Drive Motor Battery System Description
Control Module References
Battery Modules and Drive Motor Battery High Voltage Manual Disconnect Lever
ACCM, ACPO, BECM, BECM FAN, CAB HTR PUMP, COOL PUMP, EPS, PIM 1 and PIM 2 Fuses
High Speed Bus (HP2)
Serial Data Communication Enable and Wake-up Circuits
G300, G302, G311, G312, G313, and G314
Figure 2:

Battery Modules and Drive Motor Battery High Voltage Manual Disconnect Lever
Object Number: 1976376 Size: FS
Master Electrical Component List
Drive Motor Battery System Description
Control Module References
Main Power Contactors
Power, Ground and Data Communication
Main Power Contactors
Main Power Contactors
Figure 3:

Main Power Contactors
Object Number: 1976379 Size: FS
Master Electrical Component List
Drive Motor Battery System Description
Control Module References
Battery Modules and Drive Motor Battery High Voltage Manual Disconnect Lever
Battery Modules and Drive Motor Battery High Voltage Manual Disconnect Lever
Battery Modules and Drive Motor Battery High Voltage Manual Disconnect Lever
G300, G302, G311, G312, G313, and G314
G300, G302, G311, G312, G313, and G314
G300, G302, G311, G312, G313, and G314
Figure 4:

High Voltage Interlock Circuit (HVIC), Contactor Control Circuit
Object Number: 1976381 Size: FS
Master Electrical Component List
Drive Motor Generator Control Module Description and Operation
Control Module References
Drive Motor with Generator Assembly - 1st Position
Accessory DC Power Control, Hybrid Power Steering