Buick LaCrosse: Global Positioning 
System (GPS) - OnStar Additional Information - OnStar - Buick LaCrosse Owners ManualBuick LaCrosse: Global Positioning System (GPS)

• Obstruction of the GPS can occur in a large city with tall buildings; in parking garages; around airports; in tunnels, underpasses, or parking garages; or in an area with very dense trees. If GPS signals are not available, the OnStar system should still operate to call OnStar. However, OnStar could have difficulty identifying the exact location.

• In emergency situations, OnStar can use the last stored GPS location to send to emergency responders.

• A temporary loss of GPS can cause loss of the ability to send a Turn-by-Turn Navigation route.

The Advisor may give a verbal route or may ask for a call back after the vehicle is driven into an open area.

    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 ...

    Cellular and GPS Antennas
    Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

    See also:

    Satellite radio reception
    You may experience problems in receiving XM™ satellite radio signals in the following situations. • If you are driving in a tunnel or a covered parking area. • If you are driving beneath t ...

    XM Radio Display Messages
    ‘‘LOADING’’ - XM is loading the audio or program information. ‘‘OFF AIR’’ - The channel currently selected is no longer broadcasting. ‘‘UPDATING’’ - The encryption code is ...

    Opening the trunk lid (Legacy)
    The trunk lid opens when the “” button is pressed continuously for at least 2 seconds. An electronic chirp will sound twice and the turn signal lights will flash twice. ...