Chevrolet 2000 Express Van Owner's Manual page 145

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.
Front Passenger Control
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.
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