2006 GMC Yukon Owner's Manual - Page 193

Rear Air Conditioning and Heating System and Electronic Climate Controls With this system, the front or rear passengers can control the air temperature, airflow and fan speed for the rear seat passengers. The climate control has an overhead control near the driver and a control on the back of the center console. AUX: Turn the knob, located on the left side of the control panel, to this position to allow the rear seat passengers to have control over the rear climate control system. See "Rear Passenger Console Control" later for more information. 9(Off): Turn the knob, located on the left side of the control panel, to this position to turn the rear climate control system off. 9(Fan): To adjust the airflow speed, turn the fan knob located on the left side of the control panel to the desired setting. Choose AUTO if you want the system to automatically choose the fan speed to maintain a selected temperature. See "Auto Mode" later in this section for more information on using this feature. °F (°C): To adjust the air temperature, turn the temperature knob on the center of the control panel. For cooler or warmer air, turn the knob counterclockwise toward 66°F (19°C) or clockwise toward 82°F (27°C). To regulate the airflow direction, adjust the right knob on the control panel. Turn the knob clockwise for floor vent airflow or counterclockwise for headliner vent airflow. Generally, the upper vents are used for air conditioning and the floor vents for heating. The knob can be set to any blend setting. Choose AUTO if you want the system to automatically regulate the airflow. See "Auto Mode" later in this section for more information on using this feature. 3-33 Driver Overhead Control Front Controls - United States shown, Canada similar To control the rear climate control from the front seat position, use the driver overhead control. The rear console control must be on.