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Check occasionally to make sure the mast is still
tightened to the antenna base located on the roof of the
vehicle. If tightening is required, tighten by hand.
Backglass Antenna (Sedan)
Vehicles without OnStar
®
have the AM-FM antenna
integrated with the rear window defogger, located in the
rear window. Make sure that the inside surface of the
rear window is not scratched and that the lines on
the glass are not damaged. If the inside surface
is damaged, it could interfere with radio reception. Also,
for proper radio reception, the antenna connector at
the top-center of the rear window needs to be properly
attached to the post on the glass.
Notice: Using a razor blade or sharp object to clear
the inside rear window may damage the rear window
antenna and/or the rear window defogger. Repairs
would not be covered by your warranty. Do not clear
the inside rear window with sharp objects.
Notice: Do not apply aftermarket glass tinting with
metallic film. The metallic film in some tinting
materials will interfere with or distort the incoming
radio reception. Any damage caused to your
backglass antenna due to metallic tinting materials
will not be covered by your warranty.
Because this antenna is built into the rear window, there
is a reduced risk of damage caused by car washes
and vandals.
If static is heard on the radio, when the rear window
defogger is turned on, it could mean that a defogger grid
line has been damaged. If this is true, the grid line must
be repaired.
If adding a cellular telephone to the vehicle, and the
antenna needs to be attached to the glass, make sure
that the grid lines for the AM-FM antenna are not
damaged. There is enough space between the grid lines
to attach a cellular telephone antenna without interfering
with radio reception.
Multi-Band Antenna
Vehicles with OnStar
®
have a multi-band antenna that
is located on the roof of the vehicle. The antenna is used
for the AM/FM radio, OnStar
®
and the XM™ Satellite
Radio Service System. Keep the antenna clear of
obstructions for clear reception. If the vehicle has a
sunroof, the performance of the AM/FM radio, OnStar
®
,
and the XM system may be affected if the sunroof
is open.
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