1999 Chevrolet Express Van Owner's Manual - Page 137

yellowblue Rear Air Conditioning and Rear Heater If your vehicle has a rear air conditioning and rear heater system combination, controls are provided to regulate the temperature, location and speed of the airflow. To adjust the air temperature, turn the temperature knob on the right side of the control panel. For warmer air, turn the knob toward the red area, and for cooler air, turn the knob toward the blue area. To regulate the airflow location, adjust the center knob on the control panel. Turn the knob counterclockwise for floor vent airflow or clockwise for headliner vent air flow. 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. 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, turn the fan knob on the front control to REAR CNTL. Front Passenger Control 3-5