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How OnStar Service Works
The OnStar system can record and transmit vehicle
information. This information is automatically sent to
an OnStar Call Center when the OnStar button is
pressed, the emergency button is pressed, or if the
airbags or AACN system deploy. This information usually
includes the vehicle’s GPS location and, in the event of
a crash, additional information regarding the crash that
the vehicle was involved in (e.g. the direction from which
the vehicle was hit). When the Virtual Advisor feature of
OnStar Hands-Free Calling is used, the vehicle also
sends OnStar the vehicle’s GPS location so they can
provide services where it is located.
OnStar service cannot work unless the vehicle is in a
place where OnStar has an agreement with a wireless
service provider for service in that area. OnStar service
also cannot work unless the vehicle is in a place where
the wireless service provider OnStar has hired for that
area has coverage, network capacity and reception when
the service is needed, and technology that is compatible
with the OnStar service. Not all services are available
everywhere, particularly in remote or enclosed areas,
or at all times.
Location information about the vehicle is only available
if the GPS satellite signals are unobstructed and
available.
The vehicle must have a working electrical system,
including adequate battery power, for the OnStar
equipment to operate. There are other problems OnStar
cannot control that may prevent OnStar from providing
OnStar service at any particular time or place. Some
examples are damage to important parts of the vehicle
in a crash, hills, tall buildings, tunnels, weather or
wireless phone network congestion.
Your Responsibility
Increase the volume of the radio if the OnStar advisor
cannot be heard. If the light next to the OnStar buttons
is red, the system may not be functioning properly.
Press the OnStar button and request a vehicle
diagnostic. If the light appears clear (no light is
appearing), your OnStar subscription has expired and
all services have been deactivated. Press the OnStar
button to confirm that the OnStar equipment is active.
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