See also:

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 ...

Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer. See the Maintenance Schedule for more information. Things that are especially important in trailer operation are automatic transmission ...

Maps
This section includes basic information that you need to know about the map database. The maps are stored on a compact flash drive that is built into the navigation system. ...