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:
Power Door Locks
On vehicles with power door locks, the switches are
located on the front doors.
(Unlock): Press to unlock the doors.
(Lock): Remove the key from the ignition and press
to lock the doors.
...
Following Distance
Stay at least twice as far behind the vehicle ahead
as you would when driving your vehicle without
a trailer. This can help you avoid situations
that require heavy braking and sudden turns. ...
Setting the Clock
See Clock (Radio with CD and
Touchscreen) for more
information. ...