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:
Lamps On Reminder
The lamps on reminder light comes on when the lights are in use. ...
Battery
Refer to the replacement number shown on the original battery label when a new
battery is needed. See Engine Compartment Overview for battery location.
WARNING
Battery posts, terminals, an ...
Auto Rear Defog
If equipped, this will allow you to
turn the auto rear defog on or off.
This feature will automatically turn
on the rear defogger when it is cold
outside.
Press SELECT when Auto Rear
Defog i ...