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

Power, Ground, Class 2 Serial Data and Transfer Case Encoder Motor


Object Number: 1241287  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Front Axle Actuator Control
B+ Bus Bar - 1 of 2
HVAC/ECAS, RR HVAC, BLOWER, RR DEFOG, STOP LP, and TREC Fuses
SP205 - 1 of 2
G110
Figure 2:

Front Axle Actuator


Object Number: 1241288  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Shift Control Switch Inputs
Power, Ground, Class 2 Serial Data and Transfer Case Encoder Motor
Ignition Switch - START, RUN, and ACC/RUN/START Bus Bars
IGN 3, Cruise, and 4WD Fuses
IGN 3, Cruise, and 4WD Fuses
G110
Figure 3:

Shift Control Switch Inputs


Object Number: 1241290  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Front Axle Actuator Control
LED Dimming Supply Voltage - 2 of 3
Ignition Switch - START, RUN, and ACC/RUN/START Bus Bars
IGN 3, Cruise, and 4WD Fuses
IGN 3, Cruise, and 4WD Fuses
G203 - 2 of 3
G203 - 1 of 3
G203 - 1 of 3