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

Transfer Case Control Module Locator View


Object Number: 377257  Size: LF
(1)Transfer Case Shift Control Module
(2)Transfer Case Wiring Harness
(3)Dash
Figure 2:

A4WD Transfer Case Locator View


Object Number: 516428  Size: MF
(1)Propshaft Speed Sensor - Rear Connector
(2)Transfer Case Encoder Motor Connector
(3)Vehicle Speed Sensor (VSS) Connector
(4)Propshaft Speed Sensor - Front Connector
(5)Transfer Case
(6)P301