See also:

Language — English/Metric
To change the language of the navigation screens or to change the navigation screens from English or metric, see Driver Information Center (DIC)   for more information. ...

Potential Issues
Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously for five days. After five ...

Wiper Blade Replacement
Windshield wiper blades should be inspected for wear or cracking. See Maintenance Schedule  . Replacement blades come in different types and are removed in different ways. ...