Buick 2001 Century - Manual (Page 178)

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If you choose to add a cellular telephone to your vehicle,
and the antenna needs to be attached to the glass, be sure
that you do not damage the grid lines for the AM
- FM
antenna. There is enough space between the lines to
attach a cellular telephone antenna without interfering
with radio reception.
On cars equipped with the rear window defogger and
built
- in antenna, the defogger grid serves as a radio
antenna. If you have this feature on your car, do not
apply aftermarket glass tinting to the back glass.
The metallic film in some tinting materials will interfere
with or distort the incoming radio reception. Care must
be taken when cleaning the rear window because breaks
in the resistive material heating element will adversely
affect radio performance and defogger performance.
See your dealer for details.
Diversity Antenna System (If Equipped)
Your AM - FM antennas are located in the front
windshield and rear window. Be sure that the inside
surfaces of the front windshield and rear window are not
scratched and that the lines on the glass are not damaged.
If the inside surfaces are damaged, they could interfere
with radio reception. Also, for proper radio reception,
the antenna connector at the top
- center of the front
windshield and the antenna connector at the top - center of
the rear window need to be properly attached to the posts
on the glass.
NOTICE:
Do not try to clear frost or other material from
the inside of the rear window with a razor blade
or anything else that is sharp. This may damage
the rear defogger grid and affect your radio’s
ability to pick up stations clearly. The repairs
wouldn’t be covered by your warranty.
If, when you turn on your rear window defogger,
you hear static on your radio station, it could mean that
a defogger grid line has been damaged. If this is true,
the grid line must be repaired.
If you choose to add an aftermarket cellular telephone to
your vehicle, and the antenna needs to be attached to the
glass, be sure that you do not damage the grid lines for
the AM
- FM antennas or place the cellular telephone
antenna over the grid lines.