Rear Window Defogger; Defogging And Defrosting - GMC Jimmy 2004 Owner's Manual

Defogging and Defrosting

Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass.
This can be minimized if the climate control system is
used properly. There are two modes to clear fog or
frost from your windshield and side windows. Use the
defog mode to clear the windows of fog or moisture
and warm the passengers. use the defrost mode
to remove fog or frost from the windshield more quickly.
For best results, clear all snow and ice from the
windshield before defrosting.
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(Defog): Use this mode to direct half the air to
the windshield and half to the floor outlet. Close the
center outlets to help defrost the side windows
more quickly. In this mode, the system will automatically
force outside air into your vehicle and it will also run
the air-conditioning compressor, unless it falls below the
temperature at which air conditioning is effective.
1
(Defrost): This mode directs most of the air to the
windshield and the side window vents, with only a
little air directed to the floor vents. When you select this
mode, the system runs the air-conditioning compressor
unless the outside temperature is at or below freezing.
Do not drive the vehicle until all the windows are clear.
3-20

Rear Window Defogger

The rear window defogger uses a warming grid to
remove fog from the rear window.
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REAR: Press this button to turn the rear window
defogger on or off. An indicator light in the button
will come on to let your know that the rear window
defogger is activated.
If your vehicle has heated outside rearview mirrors,
when the rear defogger button is pressed the mirrors will
warm to help clear any fog or frost from the surface of
the mirrors.
Notice: Using a razor blade or sharp object to clear
the inside rear window may damage the rear
window defogger. Repairs would not be covered by
your warranty. Do not clear the inside of the rear
window with sharp objects.