Cellular and GPS Antennas

Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception.

Cellular reception is required for OnStar to send remote signals to the vehicle.

    See also:

    Engine Overheating
    The vehicle has an indicator to warn of engine overheating. There is an engine coolant temperature warning light on the vehicle's instrument panel. See Engine Coolant Temperature Gauge. If t ...

    Tips and Troubleshooting Chart
    ...

    Heated Mirrors
    The heated outside rearview mirrors turn on when the rear window defogger is on. (Rear Window Defogger): This button is on the climate control panel. See “Rear Window Defogger” under Dual Automa ...