Oldsmobile 2002 Bravada - Manual (Page 171)

3-7
Rear Window Defogger
The lines you see on the
rear window warm the
glass. Press the button to
start warming your rear
window. A light will glow
in the button while the
defogger is working.
If your vehicle is equipped with heated mirrors,
this button will activate them.
After 10 minutes it will turn off by itself, or press the
button during the heating cycle to turn it off. If you
need additional warming time, press the button again.
Do not attach a temporary vehicle license, tape or decals
across the defogger grid on the rear window.
NOTICE:
Do not try to clear frost or other material from
the inside of the rear window with a razor blade
or anything else that is sharp. This may damage
the defogger grid. The repairs wouldn’t be
covered by your warranty.