Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.
See also:
Map Data Updates
The navigation map database is stored on a compact flash card. It is usable only
in this type of navigation system, and will not function in other electronic devices.
The map in the vehicle was ins ...
Different Size Tires and Wheels
If wheels or tires are installed that are a different size than the original
equipment wheels and tires, vehicle performance, including its braking, ride
and handling characteristics, stability, and ...
Manual Rearview Mirror
Adjust the inside rearview mirror for a clear view of the area behind your
vehicle. To avoid glare of the headlamps from behind, push the tab forward for
daytime and pull it for nighttime use.
Ve ...