Multi-Band Antenna
The antenna located on the roof of the vehicle is used for the OnStar, XM 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, the performance of OnStar, XM, and GPS can be affected.
See also:
When the System Does Not Seem
to Work Properly
Occasional missed alerts can
occur under normal circumstances
and will increase in wet conditions.
The system does not need to be
serviced due to an occasional
missed alert. The number of mis ...
Reactivation for Subsequent
Owners
Push and follow the prompts to
speak to an Advisor as soon as
possible after acquiring the vehicle.
The Advisor will update vehicle
records and will explain the OnStar
service offers and opt ...
OnStar®
If the vehicle is equipped with an active OnStar system, that system may
also record data in crash or near crash-like situations.
The OnStar Terms and Conditions provides information on data colle ...