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

Power Ground and Shift Controls


Object Number: 1961123  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Transfer Case Controls
Figure 2:

Transfer Case Controls


Object Number: 1961126  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Power Ground and Shift Controls