GMC savana 2002 사용자 설명서

If you see lines running across the rear windows, your
vehicle has a rear window defogger. The lines warm 
the glass.

For best results, clear the windows of as much snow or
ice as possible before using the rear window defogger.

To turn on the rear window
defogger, press this button
located near the fan control.
An indicator light in the
button will come on when
the rear window defogger 
is working.

The rear window defogger will only work when the
ignition is in RUN.

The rear window defogger will turn itself off after
several minutes. If you need additional warming time,
press the button again. Pressing the button when the
indicator light is illuminated will turn the defogger off.

If your vehicle is equipped with heated outside rearview
mirrors, the rear window defogger button will activate
both the rear window defogger and the heated outside
rearview mirrors. See “Heated Outside Rearview
Mirrors” in the Index.

Do not attach a temporary vehicle license, tape or decals
across the defogger grid on the rear windows. Use care
not to damage the wiring bands that connect the rear
window defogger grid when operating the rear
swing

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out windows (if equipped).