WARNING: This page is about a different car, the 2005 Pontiac Aztek and 2005 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Locating Intake Air Temperature (IAT) Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Install the IAT sensor (1) by snapping into place.