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

Transfer Case Control Module Locator View


Object Number: 203290  Size: LF
(1)Right side cowl panel
(2)Transfer Case Control Module Connector (Not Used on Selectable)
(3)Transfer Case Control Module Connector
(4)Body harness to IP Connector
Figure 2:

A4WD Transfer Case Locator View


Object Number: 498835  Size: LF
(1)C311 (Engine Harness to VSS Extension Harness)
(2)Transfer Case Encoder Motor Connector
(3)Transfer Case Rear Vehicle Speed Sensor
(4)Vehicle Speed Sensor (VSS) (Input to VCM)
(5)Transfer Case Front Vehicle Speed Sensor
Figure 3:

AutomaticTransfer Case In-Line Connector Locator View


Object Number: 203302  Size: LF
(1)Brake Booster
(2)C108 (Body Harness to Transfer Case Extension Harness)