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:

    Off-Road Recovery
    You may find that your right wheels have dropped off the edge of a road onto the shoulder while you are driving. If the level of the shoulder is only slightly below the pavement, recovery should ...

    XM™ Satellite Radio Service
    XM satellite radio service gives digital radio reception from coast to coast in the 48 contiguous United States, and in Canada. Just as with FM, tall buildings or hills can interfere with sa ...

    Maintenance I
    • Change engine oil and filter. See Engine Oil. An Emission Control Service. • Engine coolant level check. See Engine Coolant (4.6L Engine) or Engine Coolant (3.9L Engine). • Windshield wa ...