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

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


Object Number: 1594128  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Speed Signal, Front Axle Actuator, and Indicators
Underhood Fuse Block
SP205
G102
G104, G105, and G107
Figure 2:

Speed Signal, Front Axle Actuator and Indicators


Object Number: 1594130  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Power, Ground, Serial Data, and Transfer Case Encoder Motor
Courtesy Lamp Supply
Ignition Switch - ACCY/RUN/START, RUN, and START Bus Bars, IGN A and CRNK Fuses
4WD, AIRBAG, ECMI, HVAC, and TRANS Fuses
4WD, AIRBAG, ECMI, HVAC, and TRANS Fuses
G104, G105, and G107