2007 Buick LaCrosse Owner's Manual - Page 177

Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window. The rear window defogger will only work when the engine is running. Outlet Adjustment Use the thumbwheels located between the center outlets to open and close the outlets. Move the lever in the center of each air outlet to adjust the direction of the airflow. = (Rear Window Defogger): Press this button to turn the rear window defogger on and off. Be sure to clear as much snow from the rear window as possible. The rear window defogger will turn off about 20 minutes after the button is pressed. If turned on again, the defogger will only run for about 20 minutes before turning off. The defogger can also be turned off by pressing the button again or by turning off the engine. Do not drive the vehicle until all the windows are clear. Notice: Do not use a razor blade or sharp object to clear the inside rear window. Do not adhere anything to the defogger grid lines in the rear glass. These actions may damage the rear defogger. Repairs would not be covered by your warranty. 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. • 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 178. 177