2009 Buick LaCrosse Owner's Manual - Page 151

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 the vehicle. To change the passenger compartment air filter, use the following steps: 1. Turn the ignition to ACC/ACCESSORY and turn the windshield wipers on. 2. Turn the ignition to LOCK/OFF when the windshield wipers are in the upright position. 3. Raise the hood. 4. Disconnect the windshield washer pump hose from the fender rail and air inlet grille. 5. Peel back the hood weather-strip from the passenger's side of the vehicle halfway to the center of the hood. • 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 the vehicle more effectively. • This vehicle has a passenger compartment air filter. If the airflow seems low when the fan is at the highest setting it may need to be replaced. For more information, see Passenger Compartment Air Filter on page 3-29. Passenger Compartment Air Filter The passenger compartment air filter is located in the engine compartment below the air inlet grille, near the passenger's side windshield wiper arm. See Engine Compartment Overview on page 5-12. The filter traps most of the pollen from the air entering the air conditioning module. The filter needs to be changed periodically to keep the air conditioning working at its best. For information on how often to change the passenger compartment air filter, see Scheduled Maintenance on page 6-4. 6. Remove the three air inlet grille retainers. 7. Remove the air inlet grille. 8. Remove the water deflector panel. 3-29