2004 Pontiac GTO Owner's Manual - Page 120

Outlet Adjustment 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 performance of the system. • When an objectionable odor outside the vehicle is encountered, use the recirculation mode, with the temperature knob at a comfortable setting to prevent the odor from entering the vehicle through the ventilation system. This can be helpful when driving through a long tunnel with poor ventilation. However, extended usage of this mode in cold or cool weather can cause window fogging. Move the thumbwheel on the vents to change the direction of the airflow. The center thumbwheel adjusts the volume of the airflow. There are also similar vents for the rear of the vehicle. They are located at the rear of the center console. 3-22