Rear Window Defogger; Outlet Adjustment - Chevrolet 2003 Silverado Owner's Manual

Rear Window Defogger

The lines you see on the rear window warm the glass.
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 you know that the rear window
defogger is activated.
The rear window defogger will automatically turn off
several minutes after the button is pressed. Pressing the
button while the defogger is running can also turn off
the defogger.
If your vehicle is equipped with heated mirrors this
button will activate them.
Notice: Don't use anything sharp on the inside of
the rear window. If you do, you could cut or damage
the warming grid, and the repairs wouldn't be
covered by your warranty. Do not attach a temporary
vehicle license, tape, a decal or anything similar
to the defogger grid.
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Outlet Adjustment

Your vehicle has air outlets that allow you to adjust the
direction and amount of airflow inside the vehicle.
Move the louvers up or down. Use the thumbwheel next
to or underneath the outlet to close the louvers. For
the most efficient airflow and temperature control, keep
the outlet in the fully opened position.
Rear seat outlets can be used to adjust airflow toward
either seating area, the floor or upward. Move the center
louvers up or down to direct the airflow.
Use the air outlets located
in the center and on the
side of your instrument
panel to direct the airflow.