2007 GMC Savana Van Owner's Manual - Page 165

To change the current mode, select one of the following: H (Vent): Use this mode to direct air to the upper outlets, with a little air directed to the floor outlets. 2 (Floor): Use this mode to direct most of the air to the floor outlets. 9 (Fan): Turn the left knob clockwise or counterclockwise to HIGH, MED (Medium) or LOW to increase or decrease the fan speed in the rear-seating area. Turn the knob to OFF to turn off the fan. Temperature Control: To increase or decrease the temperature for the rear of the vehicle, turn the right knob located on the climate-control panel. The air-conditioning system on the main climate control panel must be turned on to direct cooled air to the rear of the vehicle. If it is not on, then the temperature in the rear of the vehicle will remain at cabin temperature. Be sure to keep the area under the front seats clear of any objects so that the air inside of your vehicle can circulate effectively. For information on how to use the main climate control system, see Climate Control System on page 159. For information on ventilation, see Outlet Adjustment on page 162. 165