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:

    Selecting a Station
    Seek Tuning If the radio station is not known: Briefly press or to automatically search for the next available station. If a station is not found, the radio switches to a more sensitive s ...

    Auto power off function
    If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNITION ON mode (the engine is not running) for more than an hour with the shift lever in P, the “ENGINE START STOP” switc ...

    Connecting and Controlling a USB Drive (Radio with CD and Radio with CD/DVD/MEM)
    The infotainment system can only play back .mp3 and .wma files from a USB drive. Only the first 2,500 songs are recognized on the device. When a device is not supported, the message “No su ...