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:

    Torque Lock (Automatic Transmission)
    Torque lock is when the weight of the vehicle puts too much force on the parking pawl in the transmission. This happens when parking on a hill and shifting the transmission into P (Park) is ...

    Servicing the Airbag-Equipped Vehicle
    Airbags affect how the vehicle should be serviced. There are parts of the airbag system in several places around the vehicle. Your dealer and the service manual have information about servicing th ...

    How to Detect a Tamper Condition
    If is pressed and the horn sounds, an attempted break-in has occurred while the system was armed. If the alarm has been activated, the THEFT ATTEMPTED message will appear on the DIC. See A ...