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

Power, Ground, Serial Data, Indicator, VSS, and Encoder Motor


Object Number: 1777072  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Shift Control Switch Inputs
B+ Bus - Underhood Fuse Block - 1 of 2
Data Link Connector (DLC) Schematics
G106
Figure 2:

Shift Control Switch Inputs


Object Number: 1777082  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Control Module References
Power, Ground, Serial Data, Indicator, VSS and Encoder Motor
B+ Bus - Underhood Fuse Block - 1 of 2
HVAC BLWR, HVAC CNTRL HD, PWR HTR SWTCH, TCCM SWTCH, and VSES/ABS Fuses
Differential Lock Schematics