Chevrolet 2008 Impala, Owner'S Manual, Page: 149 / 400

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
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(Rear Window Defogger): The rear window
defogger turns off automatically after it has been
activated for 10 minutes. It can be turned off manually,
by pressing the button again or by turning the ignition
to the LOCK/OFF position. If additional window clearing
is required, the rear window defogger can be turned
on again for additional window clearing. The length of
defogger operation will increase if the vehicle is
being driven.
If your vehicle has heated outside rearview mirrors,
the mirrors will heat to help clear fog or frost from the
surface of the mirror when the rear window defog button
is pressed. See Outside Power Mirrors on page 2-37.
Do not drive the vehicle until all the windows are clear.
Notice: Do not use anything sharp on the inside
of the rear window. If you do, you could cut or
damage the warming grid, and the repairs would not
be covered by your warranty. Do not attach a
temporary vehicle license, tape, a decal or anything
similar to the defogger grid.
Outlet Adjustment
Use the thumbwheel located below or to the side of
the outlet, to change the direction of the air flow.
Operation Tips
•
Clear away any ice, snow or leaves from the air
inlets at the base of the windshield that may
block the flow of air into your vehicle.
•
Use of non-GM approved hood deflectors may
adversely affect the performance of the system.
•
Keep the path under the front seats clear of objects
to help circulate the air inside your vehicle more
effectively.
•
If the airflow seems low when the fan is at the
highest setting, the passenger compartment
air filter, if equipped, may need to replaced. For
more information, see Passenger Compartment Air
Filter on page 3-26 and Scheduled Maintenance
on page 6-4.
•
If fogging reoccurs while in vent or bi-level modes
with mild temperature throughout the vehicle, turn
on the air conditioner to reduce windshield fogging.
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