GMC CADILLAC USER EXPERIENCE System Manual page 18

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Mobile Device Usage
Mobile device usage, such as making
or receiving phone calls, charging,
or just having the mobile device on
may cause static interference in the
radio. Unplug the mobile device or
turn it off if this happens.
Backglass Antenna
The AM-FM antenna is integrated
with the rear window defogger in the
rear window. Do not scratch the inside
surface or damage the lines in the
glass. If the inside surface is damaged,
it could interfere with radio reception.
For proper radio reception, the
antenna connector needs to be
properly attached to the post on the
glass.
If attaching a cell phone antenna to
the glass, attach it between the grid
lines.
Caution
Using a razor blade or sharp object
to clear the inside rear window can
damage the rear window antenna
and/or the rear window defogger.
Repairs would not be covered by
the vehicle warranty. Do not clear
the inside rear window with sharp
objects.
Caution
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
(Continued)
RADIO
Caution (Continued)
the backglass antenna due to
metallic tinting materials will not
be covered by the vehicle warranty.
Multi-Band Antenna
The roof antenna is for SiriusXM
Satellite Radio (U.S. and Canada only),
OnStar, and GPS (Global Positioning
System). Keep clear of obstructions for
clear reception. If the vehicle has a
sunroof, and it is open, reception can
also be affected.
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