GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Transfer Case Control Schematics
Figure 1:

Power, Ground, Class 2 Serial Data, Transfer Case Shift Control Module and Transfer Case Encoder Motor
Object Number: 1841009 Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Transfer Case Shift Control Switch Inputs
Batteries - LG4/LG5 and B+ Bus
G101 - 1 of 2
Ignition Switch - OFF/RUN/START, RUN/START, and START Busses
Splice Pack SP203
Figure 2:

Transfer Case Shift Control Switch Inputs
Object Number: 1841032 Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Power, Ground, Class 2 Serial Data, Transfer Case Shift Control Module and Transfer Case Encoder Motor
G103 - 1 of 2, G105, and G106
LIGHTING, CTSY LAMPS, PRK LAMPS, HVAC, ILLUM, LT PARK, and RT PARK Fuses/Circuit Breakers - 1 of 2
LIGHTING, CTSY LAMPS, PRK LAMPS, HVAC, ILLUM, LT PARK, and RT PARK Fuses/Circuit Breakers - 1 of 2