GMC 1997 Safari Owner's Manual page 174

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To unlock a secured radio, see "Unlocking the
Theft-Deterrent Feature After
a
Power Loss" earlier in
this section.
Understanding Radio Reception
FM Stereo
FM
stereo will give you the best sound. But
FM
signals
will reach only about 10 to 40 miles (16 to 65 km). Tall
buildings or hills can interfere with
FM
signals, causing
the sound to come and go.
AM
The range for most AM stations is greater than for FM,
especially at night. The longer range, however, can
cause stations to interfere with each other. AM can pick
up noise from things like storms and power lines. Try
reducing the treble to reduce this noise if you ever get it.
Tips About Your Audio System
Hearing damage from loud noise is almost undetectable
until it is too late. Your hearing can adapt to higher
volumes of sound. Sound that seems normal can be loud
and harmful to your hearing. Take precautions by
adjusting the volume control on your radio to a safe
sound level before your hearing adapts to it.
To help avoid hearing loss or damage:
0
Adjust the volume control to the lowest setting.
0
Increase volume slowly until you hear comfortably
and clearly.
NOTICE:
Before you add any sound equipment to your
vehicle
--
like a tape player, CB radio, mobile
telephone or two-way radio
--
be sure you can add
what you want. If you can, it's very important to
do it properly. Added sound equipment may
interfere with the operation of your vehicle's
engine, Delco radio or other systems, and even
damage them. Your vehicle's systems may interfere
with the operation of sound equipment that has
been added improperly.
So, before adding sound equipment, check with
your dealer and be sure to check Federal rules
covering mobile radio and telephone units.
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