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

Power, Ground, Serial Data, and Transfer Case Encoder Motor


Object Number: 1570430  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Propshaft Speed Sensors, Front Axle Actuator, and Transfer Case Shift Control Switch
B+ Bus Bar
Power, Ground, DLC, and Splice Pack SP205
G104, G107, and G110
Figure 2:

Prop Shaft Speed Sensors, Front Axle Actuator, and Transfer Case Shift Control Switch


Object Number: 1570431  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Power, Ground, Serial Data, and Transfer Case Encoder Motor
LED Dimming Supply - 2 of 2
G203 - 1 of 2
G104, G107, and G110