2004 Cadillac CTS Owner's Manual - Page 154

j (Side Window Defog): Turn the thumbwheel to this symbol to use the side window defog setting. The air coming through the outlets will be directed toward the side windows to clear fog. Turn the thumbwheel to this symbol to open the outlets completely and allow the maximum amount of air to enter your vehicle. A small amount of air will still be directed to the side windows. Turn the thumbwheel to this symbol to close the outlets and minimize the amount of air entering the vehicle. Passenger Compartment Air Filter The passenger compartment air filter traps most of the pollen from the air entering your vehicle. Like your vehicle's engine air cleaner/filter, it needs to be changed periodically. For how often to change the passenger compartment air filter, see Scheduled Maintenance on page 6-4. k (Open): l (Closed): 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 your 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 your vehicle more effectively. If the airflow seems low when the fan speed is at the highest setting, the passenger compartment air filter may need to be replaced. For more information, see Passenger Compartment Air Filter on page 3-32. The passenger compartment air filter is located underneath the hood below the windshield wiper arm on the passenger's side of the vehicle. See Engine Compartment Overview on page 5-12 for more information on location. 3-32