2010 Buick LaCrosse Owner's Manual - Page 218

7-8 Climate Controls Air Vents Use the louvers located on the air vents to change the direction of the airflow. To open the vent, move the thumbwheel to R . To close the vent, move the thumbwheel to (. Operation Tips . Maintenance Air Intake Clear away any ice, snow, or leaves from the air intake at the base of the windshield that can block the flow of air into the vehicle. The passenger compartment air filter can be accessed by removing the entire glove box. 1. Open the passenger side door. Remove the end cover located on the side of the instrument panel in the top right corner. Remove the screw affixed to the side of the glove box. 2. Open the glove box door and remove the attached screws from around the glove box. 3. Lower the loosened glove box housing. 4. Unplug both wire cables and remove the glove box. 5. Pull the three tabs to release and open the filter door. Keep all outlets open whenever possible for best system performance. Keep the path under all seats clear of objects to help circulate the air inside the vehicle more effectively. Use of non-GM approved hood deflectors can adversely affect the performance of the system. Passenger Compartment Air Filter The filter removes dust, pollen, and other airborne irritants from outside air that is pulled into the vehicle. The filter should be replaced as part of routine scheduled maintenance. See Scheduled Maintenance on page 10‑2 for replacement intervals. To find out what type of filter to use, see Maintenance Replacement Parts on page 10‑9. . .