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

Power, Ground and Shift Controls


Object Number: 1917108  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Transfer Case Controls
Figure 2:

Transfer Case Controls


Object Number: 1917118  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Front Axle Controls
Power, Ground and Shift Controls
Figure 3:

Front Axle Controls


Object Number: 1917121  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Transfer Case Controls