GM Service Manual Online
For 1990-2009 cars only

Rotate the instrument panel outlets and move the louvers on the outlets to change the direction and amount of airflow inside the vehicle.

Operation Tips

    • Clear away any ice, snow or leaves from the air inlets at the base of the windshield that can block the flow of air into the vehicle.
    • Use of non-GM approved hood deflectors can 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.
    • 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.