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:

    Unlocking a channel
    A channel's access code2 is required to unlock a channel. Unlock all channels This permanently removes all channels from the locked list and makes them available for selection. Temporarily un ...

    Head Restraints — Rear Seats
    The rear seat head restraints are fixed and cannot be adjusted. For proper routing of a Child Seat Tether refer to “Occupant Restraints” in “Things to Know Before Starting Your Vehicle” ...

    General information on radio frequencies
    CAUTION: The radio frequency used by yourremote control can also be used byother short distance radiotransmissions (e.g. amateur radios,medical equipment, wireless headphones,remote controls and alar ...