Removal Procedure

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Separate the front of the overhead console (1) from the headliner.
Push the assembly rearward and pull down in order to access the retaining tabs.
Remove the auxiliary HVAC control assembly (2) by releasing the tabs at the rear of the control and push out from the rear.
Disconnect the electrical connector (3).

Fig 1: Removing HVAC Control Assembly - Rear Auxiliary
Courtesy of GENERAL MOTORS CORP.