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:
Rear Side Window Antenna
The AM-FM antenna is located in the passenger rear side windows. Make sure the
inside surfaces of the rear side windows are not scratched and that the lines on
the glass are not damaged. If the in ...
SBZA Detection Zones
The SBZA sensor covers a zone
of approximately one lane over
from both sides of the vehicle,
or 3.5m(11 ft). This zone starts at
each side mirror and goes back
approximately 5.0 m(16 ft).
T ...
If the System Needs Service
If the navigation system needs service and the steps listed here have been followed
but there are still problems, see your dealer for assistance. ...