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

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


Object Number: 1570426  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Front Axle Actuator and Switch Controls
B+ Bus Bar
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: 1570429  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