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

Power, Ground and Shift Controls


Object Number: 1847672  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Transfer Case Controls
Ignition II/III Voltage
RUN/CRANK BUS - AIRBAG IGN, MISC IGN and SEO/ALC Fuses
AMP, ELEC RUN BOARD, ESC/ALC EXH, EXP/PTO, INFOTMNT, and TREC Fuses
Transfer Case Controls
LED Dimming 3 of 3
Ignition I Voltage and 12 Volt Reference
Accessory Wakeup Serial Data
G102, G107 (4.3L), G104, G108
Figure 2:

Transfer Case Controls


Object Number: 1847673  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Front Axle Controls
Power, Ground and Shift Controls
High Speed Bus - 2 of 3
Power, Ground and Shift Controls
Figure 3:

Front Axle Controls


Object Number: 1847674  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Transfer Case Controls
Ignition II/III Voltage
RUN/CRANK BUS - ECM-IGN and TRANS IGN 1 Fuses
G102, G107 (4.3L), G104, G108