2005 GMC Yukon Owner's Manual - Page 180

Outlet Adjustment Use the air outlets located in the center and on the side of your instrument panel to direct the airflow. Rear Air Conditioning System If your vehicle has the optional rear air conditioner, it has two rear air conditioning fan speed selectors. One fan speed selector is located in the overhead console and the other is located in the headliner above the second row seats. Operation Tips • Keep the hood and front air inlets free of ice, snow, or any other obstruction (such as leaves). The heater and defroster will work far better, reducing the chance of fogging the inside of your windows. • When you enter a vehicle in cold weather, turn the fan knob all the way to the right for a few moments before driving. This helps clear the intake ducts of snow and moisture, and reduces the chance of fogging the inside of your window. • Keep the air path under the front seats clear of objects. This helps air to circulate throughout your vehicle. • Adding outside equipment to the front of your vehicle, such as hood-air deflectors, may affect the performance of the heating and air conditioning system. Check with your dealer before adding equipment to the outside of your vehicle. Front Control To increase and decrease the flow of cooled air to the rear vents, turn the knob to the fan speed you want. The knob has three speed positions. To increase the flow of cooled air, turn the knob clockwise. To decrease the flow of cooled air, turn it counterclockwise. To turn the fan off, turn the knob to the off position. 3-30