GM Service Manual Online
For 1990-2009 cars only

Use the louvers located on the air outlets to change the direction of the airflow.

Operation Tips

    â€¢ Clear away any ice, snow, or leaves from the air inlets at the base of the vehicle that may block the flow of air into the vehicle.
    â€¢ Do not use any non-GM approved hood deflectors that could adversely affect the performance of the system.
    â€¢ Keep the path under the front seats clear of objects to help circulate the air inside of the vehicle more effectively.