2003 Buick Regal Owner's Manual - Page 131

Outlet Adjustment Open and close the air outlets, or adjust the direction of the airflow by moving the levers in the center of each outlet. 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, if equipped, may need to be replaced. For more information, see Passenger Compartment Air Filter on page 3-26 and Part A: Scheduled Maintenance Services on page 6-4 Passenger Compartment Air Filter The passenger compartment air filter is located underneath your hood below the windshield wiper arm, on the passenger's side (below the air inlet grille) of the vehicle. Operation Tips 0 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. The filter traps most of the pollen from the air entering the air conditioning module. Like your engine's air cleanedfilter, it may need to be changed periodically. For information on how often to change the passenger compartment air filter, see Part A: Scheduled Maintenance Services on page 6-4. 3-26