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

Power and Ground


Object Number: 1700421  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Shift Controls and Indicators
G102 and G108
RUN/CRANK Bus - AIRBAG IGN, MISC IGN, ans SEO/ALC Fuses
RUN/CRANK Bus - AIRBAG IGN, MISC IGN, ans SEO/ALC Fuses
RUN/CRANK Bus - AIRBAG IGN, MISC IGN, ans SEO/ALC Fuses
G102 and G108
Encoder Motor and Serial Data
B+ Bus - 1 of 3
DLIS Fuse and Ignition Switch
DLIS Fuse and Ignition Switch
Figure 2:

Shift Control and Indicators


Object Number: 1700422  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Encoder Motor and Serial Data
Power and Ground
LED Dimming - 3 of 3
Ignition 1 Voltage
Ignition 1 Voltage
Ignition 1 Voltage
Figure 3:

Encoder Motor Control and Serial Data


Object Number: 1700423  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Front Axle Actuator and Speed Sensors
Shift Controls and Indicators
Low Speed Bus - SP200 - 1 of 3
High Speed Bus - 2 of 2
Power and Ground
Figure 4:

Front Axle Actuator and Speed Sensors


Object Number: 1700424  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Encoder Motor and Serial Data
Ignition 3 and Accessory Voltage
G102 and G108
B+ Bus - 1 of 3
FWD and HTD STR/WHL Fuses - Built Before 11/29
G102 and G108