2005 Buick Park Avenue Owner's Manual - Page 144

Outlet Adjustment Use the thumbwheel located in the middle of the front outlets to change the direction of the airflow and to open and close the outlets. Use the thumbwheel located between the rear passenger outlets to open and close the outlets. Adjust the direction of the airflow from side to side with the levers in the center of each rear outlet. Passenger Compartment Air Filter Passenger compartment air, both outside air and recirculated air, is routed through a passenger compartment filter, which is part of a three piece filter system. The filter removes certain particles from the air, including pollen and dust particles. Reductions in airflow, which may occur more quickly in dusty areas, indicate that the filter needs to be replaced early. 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 of your vehicle more effectively. • If the airflow seems low when the fan is at the highest setting, the passenger compartment air filter may need to be replaced. See Passenger Compartment Air Filter on page 3-30. The particle filter is located inside of the air control module. The air control module is located behind an access panel near the accelerator pedal. 3-30