User's Manual

35
Potential Issues You May Encounter
Some OnStar services are disabled
after 48 hours
OnStar is powered by your vehicle’s battery. To preserve the battery
for starting the vehicle, OnStar cannot perform remote door unlocks,
alerts, or vehicle theft location after the vehicle has been off continuously
for 48 hours.
Global Positioning System (GPS)
Vehicle positioning information is normally sent to the OnStar
Center during OnStar button pushes, air bag deployments, or
emergency-service button requests from the vehicle.
Vehicle position is determined by your vehicle receiving signals
transmitted by GPS satellites. If the signals are obstructed,
positioning capability could be degraded or lost. This situation would
be most prevalent in urban areas with tall buildings. Tunnels,
underpasses, parking garages, trees, and similar structures could also
adversely affect positioning
performance. Under these conditions, the system will operate but
the OnStar Center could have difficulty identifying your location.
Cellular antennas
Your OnStar-equipped vehicle may have a short, black,
cellular antenna. You should occasionally check it to be sure it’s tight by
rotating the mast clockwise with your fingers. Because all OnStar
cellular antennas are ideally mounted outside of the metal and
glass of the vehicle, they can receive cellular signals without
obstruction by the vehicle. You will find that the OnStar system
broadcasts and receives cellular signals much better than a
handheld cell phone. This may allow you to make and receive calls
when other phones won’t.
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