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:

    Diagnostics
    OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...

    Instrument Panel
    CTS Shown, CTS–V Similar A. Air Vents. B. Driver Information Center (DIC). C. Instrument Panel Illumination Control. D. Turn and Lane-Change Signals. E. Instrument Cluster. F. Windshield Wip ...

    Vehicle Personalization
    Your vehicle may have customization capabilities that allow you to program certain features to one preferred setting. Customization features can only be programmed to one setting on the vehicle an ...