Removal Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Remove the I/P accessory trim plate. Refer to TRIM PLATE REPLACEMENT - INSTRUMENT PANEL (I/P) ACCESSORY in Instrument Panel, Gages and Console.
Remove the HVAC control module retaining screws.
Pull the HVAC control module out from the I/P center support bracket.

Fig 1: Removing HVAC Control Module From I/P Center Support Bracket
Courtesy of GENERAL MOTORS CORP.
Disconnect the electrical connector from the HVAC control module.
Remove the HVAC control module from the vehicle.

Fig 2: Disconnecting Electrical Connector From HVAC Control Module
Courtesy of GENERAL MOTORS CORP.