The multi-band antenna is on the roof of the vehicle. The antenna is used for AM-FM radio, OnStar, the SiriusXM satellite radio service system, and GPS (Global Positioning System), if the vehicle has these features. Keep the antenna clear of obstructions for clear reception.
If the vehicle has a sunroof, and it is open, reception can also be affected.
Radio Reception
Audio PlayersDiagnostic Repair Verification
Note:After a repair has been made, some DTCs require the ignition to be turned OFF thenback ON before the scan tool function will clear the DTC.Ignition OFF.Install any components or connectors that have been removed or replaced during diagnosis.Perform any adjustment, programming or setup procedure ...