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:
Return to Factory Settings
Select Return to Factory Settings to return all of the vehicle
personalization to the default settings. Turn the knob to select Yes or No.
Press the knob to confirm and go back to the last menu. ...
Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil.
The recommended oils with the dexos specification and displaying the dexos
certification mark are all that is needed for good performance and engine
protection.
...
Keyless Unlock
If the vehicle has the keyless
access system, this feature allows
you to select which doors will
automatically unlock when you
approach the vehicle with the
keyless access transmitter and
...