WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Connect the auxiliary HVAC control module electrical connectors.
Install the auxiliary HVAC control module by pushing the control into the console until the retaining tabs snap into place.
Fig 1: Connecting Auxiliary HVAC Control Module Electrical Connectors