Installation Procedure

Attach the radio antenna module to the headliner retaining strips.
Connect the coax cable to the radio antenna module.

Fig 1: Identifying Radio Antenna Module & Coax Cable
Courtesy of GENERAL MOTORS CORP.
Connect the electrical connector to the radio antenna module.
Connect the radio antenna module electrical connector to the stationary glass.
Install the rear headliner to roof retainers.

Fig 2: Removing/Installing Rear Headliner To Roof Retainers & Coat Hook Retaining Screw
Courtesy of GENERAL MOTORS CORP.
Install the left coat hook. Refer to COAT HOOK REPLACEMENT in Interior Trim.