Buick 2009 Lucerne - Manual (Page 172)

Outlet Adjustment
Use the levers, located in the middle of the front
outlets, to change the direction of the airflow. Use the
thumbwheel located between the outlets to turn them
on and off.
If the vehicle has rear seat outlets, adjust the direction of
the airflow using the lever in the center of each outlet.
Operation Tips
• Clear away any ice, snow, or leaves from the air
inlets at the base of the windshield that could
block the flow of air into the vehicle.
• Use of non-GM approved hood deflectors can
adversely affect the performance of the system.
• Keep the path under the front seats clear of objects
to help circulate the air inside the vehicle better.
Passenger Compartment Air Filter
Outside air is routed through a passenger compartment
air filter before entering the vehicle. This filter removes
certain particles from the air, including pollen and
dust particles. The filter should be replaced as part of
routine scheduled maintenance. See Scheduled
Maintenance on page 6-4 for when to replace the filter.
The access panel for the passenger compartment
air filter is located under the hood near the windshield,
on the passenger’s side of the vehicle.
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