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

Transfer Case Shift Control Switch


Object Number: 349756  Size: MF
(1)Transfer Case Shift Control Switch
(2)Instrument Panel Switch and Deflector Housing
Figure 2:

Transfer Case Shift Control Module


Object Number: 886493  Size: MF
(1)I/P Harness
(2)Transfer Case Shift Control Module Connectors
(3)Transfer Case Shift Control Module
(4)Instrument Panel
Figure 3:

Transfer Case - BW 4482 - NR4


Object Number: 886492  Size: MF
(1)Vehicle Speed Sensor (VSS) Connector
(2)Transfer Case
(3)Encoder Motor Connector