2011 Buick Lucern Owner's Manual - Page 181

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. 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. To access the passenger compartment air filter, do the following: 1. Press the tabs back and left to remove the cover. 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 7 ‑ 3 for when to replace the filter. 2. Insert a tool behind the push pin located on the inboard side of the air filter compartment to carefully pry the pin out. 4-25