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:
Brake Adjustment
Every time the brakes are applied,
with or without the vehicle moving,
the brakes adjust for wear. ...
Maintenance Replacement Parts
Replacement parts identified here by name, part number, or specification can
be obtained from your dealer.
...
Automatic Level Control
The automatic level control rear suspension comes as a part of the Road Sensing
Suspension. See Road Sensing Suspension .
This type of level control is fully automatic and will provide a bett ...