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

Transfer Case Harness Routing


Object Number: 769969  Size: LF
(1)Vehicle Speed Sensor (VSS) Adapter
(2)Transfer Case Shift Control Switch Connector
(3)VSS Connector
(4) Transfer Case
(5)Harness Brackets
(6)Left Frame Rail
(7)Crossmember
(8)Fuel Line Bracket
Figure 2:

Transfer Case Shift Control Module


Object Number: 770347  Size: MF
(1)Transfer Case Shift Control Module
(2)Fuse Block Connector
(3)Splice Pack 205 (SP205)
(4)Courtesy Lamp Socket
(5)Bulb
(6)Courtesy Lamp IP Bracket
(7)Fuse Block
(8)Transfer Case Shift Control Module Connector - C1
(9)Transfer Case Shift Control Module Connector - C2
Figure 3:

Transfer Case Shift Control Switch


Object Number: 770349  Size: MF
(1)Transfer Case Shift Control Switch
(2)Instrument Panel Switch and Deflector Housing
Figure 4:

Front Drive Axle Harness Routing (K25 Series)


Object Number: 769974  Size: LF
(1)G110
(2)Vent Tube
(3)Vent Tube Connection
(4)Front Axle Actuator
(5)Front Axle Actuator Connector
(6)Left Inner Fender
Figure 5:

Front Drive Axle Harness Routing (K15 Series)


Object Number: 769978  Size: LF
(1)Vent Tube
(2)Vent Tube Connection
(3)Front Axle Actuator
(4)Front Axle Actuator Connector
(5)Front Drive Axle Assembly (Mount)
(6)G110
(7)Left Inner Fender