Removal Procedure

Remove the trim panel. Refer to TRIM PANEL REPLACEMENT -- REAR QUARTER LOWER (AZTEK) or TRIM PANEL REPLACEMENT -- REAR QUARTER LOWER (RENDEZVOUS) .
Disconnect the electrical connector.
Remove the screws which retain the rear cargo audio control.

Fig 1: Disconnecting Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Remove the rear cargo audio control from the trim panel.

Fig 2: Removing Rear Cargo Audio Control From Trim Panel
Courtesy of GENERAL MOTORS CORP.