Rear Window Defogger - GMC 1999 Sierra 1500 Pickup Owner's Manual

Comfort Controls & Audio Systems
i
Rear Window Defogger
You can tell if your vehicle has this option by looking at the rear window.
If
you see lines running across the glass, you have it. Thes'e are the wires
which heat your window.
For best results, clear the window of as much snow or ice as possible first.
To turn on the rear window defogger, find the switch marked REAR DEFOG
on your instrument panel, just below the heater system. Press the right side
of the switch, with the defog symbol on it, until the light in the switch comes
on, then release
it.
The rear window defogger will only work if the ignition
switch is turned to RUN.
You can turn the defogger off at any time by pressing the left, lighted side of
the switch. The defogger will shut itself
off after several minutes, so that the
glass does not get too hot. If the defogger shuts off, and the window still
isn't clear, turn the defogger on again.
-.
-
I.-
3-0