1996 GMC Suburban Owner's Manual - Page 138

regulate the airflow locanon, adjusr me center knob on the control panel. Turn the knob clockwise for floor vent airflow or counterclockwise for headliner vent airflow. Generally, the upper vents are used for air conditioning and the floor vents for heating. The control knob can be set to any blend setting. 10 Air Conditioning On hot days, open the windows long enough to let hot air inside escape. Thisreduces the time it takes for your vehicle to cool down. Then keep your windows closed for the air conditioner to work its best. The recirculation button, between the fan and temperature knobs, allows the air inside your vehicle to be recirculated. This setting helps to maximize your air conditioner's performance and your vehicle's fuel economy. This setting also cools the air the fatest and can be used to keep unwanted odors and/or dust from entering the vehicle. When using the air conditioner, turn off recirculation after the vehicle reachesa comfortable interior temperature. When the rightknob on the control panel is between HEATER and DEFROST, the recirculation feature will not function. The A/C button, between the temperature and mode knobs, allows the air coming into your vehicle to be cooled. This setting is useful for normal cooling on hot days. When you use A/C with the recirculation button pushed in, turn off recirculation as soon as the vehicle reaches a comfortable interior temperature. To adjust the airflow speed, turn the fan control knob on the left side of the control panel to the desired blower setting. To activate the rear control, move the fan knob on the front control to REAR CNTL. The rear control works just like the front control. I t will allow second seat passengers to adjust the controls as they desire. 3-6