See also:

Driving On Grades
Reduce speed and shift to a lower gear before starting down a long or steep downgrade. If the transmission is not shifted down, the brakes might have to be used so much that they would get h ...

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. ...

Adding Destinations to the Address Book
There are two ways to add a destination to the address book: To add the current vehicle position to the address book, press the Mark screen button from the map screen. The system automatically ...