Removal Procedure

WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Remove the rear sail panels. Refer to Sail Panel Replacement in Interior Trim.
Remove the rear assist handles. Refer to Assist Handle Replacement in Interior Trim.
Remove the rear roof mounted dome lamp. Refer to Dome Lamp Replacement in Lighting Systems.
Carefully lower the rear of the headliner to access the antenna module.
Disconnect the coax cables (3,4).

Fig 1: Removing & Installing Antennae Module
Courtesy of GENERAL MOTORS CORP.
Disconnect the electrical connector (1).
Slide the diversity antenna module (2) off the mounting bracket.