Hummer 2006 H3 - Manual (Page 200)

Navigation/Radio System
Your vehicle may have a navigation radio system.
The navigation system has built-in features intended
to minimize driver distraction. Technology alone,
no matter how advanced, can never replace your own
judgment. See the Navigation System manual for
some tips to help you reduce distractions while driving.
Theft-Deterrent Feature
THEFTLOCK ® is designed to discourage theft of your
vehicle’s radio. The feature works automatically by
learning a portion of the Vehicle Identification Number
(VIN). If the radio is moved to a different vehicle, it
will not operate and LOCKED will appear on the display.
When the radio and vehicle are turned off, the blinking
red light indicates that THEFTLOCK
® is armed.
With THEFTLOCK ® activated, the radio will not
operate if stolen.
Radio Reception
You may experience frequency interference and static
during normal radio reception if items such as cellphone
chargers, vehicle convenience accessories, and
external electronic devices are plugged into the
accessory power outlet. If there is interference or static,
unplug the item from the accessory power outlet.
AM
The range for most AM stations is greater than for
FM, especially at night. The longer range can cause
station frequencies to interfere with each other.
For better radio reception, most AM radio stations
will boost the power levels during the day, and then
reduce these levels during the night. Static can
also occur when things like storms and power lines
interfere with radio reception. When this happens,
try reducing the treble on your radio.
FM Stereo
FM stereo will give 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 fade in and out.
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