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

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


Object Number: 1775046  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Front Axle Actuator and Switch Controls
Ignition Switch - START, RUN, and ACC/RUN/START BUS BARS, IGN A, and CRNK Fuses
4WS, RR WPR, STOP LP, TREC, VEH STOP, and VEH CHMSL Fuses
Power, Ground, DLC and Splice Pack SP205
G104, G107, and G110
Figure 2:

Front Axle Actuator and Switch Controls


Object Number: 1775047  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
Ignition Switch - START, RUN, and ACC/RUN/START BUS BARS, IGN A, and CRNK Fuses
G203 - 1 of 2
G104, G107, and G110