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

Power, Ground, and DLC


Object Number: 1774309  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Body Control Module Programming and Setup
Transfer Case Encoder Motor
B+ Bus - Underhood Fuse Block
Splice Pack SP105 and G105 - 1 of 2
RUN/CRANK RELAY BUS - 1 of 3, CRUISE, SIR, and TRANS Fuses
RUN/CRANK RELAY BUS - 1 of 3, CRUISE, SIR, and TRANS Fuses
Shift Control Switch Inputs
Data Communication Schematics
Splice Pack SP106 and G106 - 2 of 2
Figure 2:

Transfer Case Encoder Motor


Object Number: 1774324  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Body Control Module Programming and Setup
Front Axle Actuator
Power, Ground, and DLC
Transfer Case Control Schematic Icons
G100, G104, G102, G103
G100, G104, G102, G103
G100, G104, G102, G103
Figure 3:

Front Axle Actuator


Object Number: 1774335  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Body Control Module Programming and Setup
Shift Control Switch Inputs
Transfer Case Encoder Motor
B+ Bus - Underhood Fuse Block
Splice Pack SP105 and G105 - 1 of 2
G100, G104, G102, G103
G100, G104, G102, G103
G100, G104, G102, G103
Figure 4:

Shift Control Switch Inputs


Object Number: 1774350  Size: FS
Master Electrical Component List
Transfer Case Description and Operation
Body Control Module Programming and Setup
Front Axle Actuator
B+ Bus - Underhood Fuse Block
FR PK LP, RR PK LP, and RR PK LP2 Fuses
FR PK LP, RR PK LP, and RR PK LP2 Fuses
FR PK LP, RR PK LP, and RR PK LP2 Fuses
Interior Lights Dimming Schematics
Splice Pack SP106 and G106 - 2 of 2
Power, Ground, and DLC
PPS Sensors and Indicators
Seat Belt Schematics