GM Service Manual Online
For 1990-2009 cars only

Use the lever located in the center of each outlet to change the direction of the airflow. Use the thumbwheel located near the outlets to turn the airflow on or off.

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.