2008 GMC Canyon Owner's Manual - Page 152

Climate Controls Climate Control System Fan Knob 9 (Fan): The center knob on the control panel is used to control the fan speed. Turn the knob clockwise or counterclockwise to increase or decrease the fan speed. If the knob is set on "0" (zero), some outside air will still enter the vehicle and will be directed according to the position of the mode knob. Mode Knob The right knob on the control panel is used to direct the airflow inside the vehicle. Turn the knob to select one of the following modes: H (Vent): The heating, cooling, and ventilation for your vehicle can be controlled with this system. Select this mode to direct air to the instrument panel outlets. Select this mode to direct approximately half of the air to the instrument panel outlets, and the remaining air to the floor outlets and the defroster and side window outlets. Cooler air is directed to the upper outlets and warmer air to the floor outlets. Select this mode to direct air to the floor outlets. Recirculation is disabled in this mode because interior window could fog under some conditions. If this occurs, see "Defogging and Defrosting" following. \ (Bi-Level): Temperature Knob The left knob on the control panel is used to adjust the temperature of the air in the vehicle. Turn the knob clockwise or counterclockwise to increase or decrease the temperature. [ (Floor): 3-20