2002 GMC Savana Van Owner's Manual - Page 145

For warmer air, turn the knob toward the red area, and for cooler air, turn the knob toward the blue area. To regulate the location of the airflow, adjust the center knob on the control panel. Turn the knob counterclockwise for upper 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 knob can be set to any blend setting. To adjust the airflow speed, turn the fan knob on the left side of the control panel to the desired fan speed. To activate the rear control, turn the fan knob on the front control to REAR CNTL. Rear Passenger Control The rear control works just like the front control. It will allow second seat passengers to adjust the controls if the front control is switched to the rear position. 3-6