2004 GMC Canyon Owner's Manual - Page 143

Mode Knob The right knob on the control panel is used to direct the airflow inside your vehicle. Turn the knob to select one of the following modes: Mode Buttons @ (Recirculation): If your vehicle has air conditioning, you will have the recirculation feature. This mode recirculates air inside the cabin, and prevents outside air from coming in the vehicle. It can be used to prevent outside odors from entering your vehicle and cool the air inside your vehicle more quickly. Press this button to turn the recirculation mode on or off. An indicator light on the button will come on to let you know the recirculation mode is activated. Recirculation is only available in the bi-level and vent modes. If you push the recirculation button while the system is in any other mode, the light on the button will flash to indicate that recirculation is not available. H (Vent): Select this mode to direct air to the instrument panel outlets. \(Bi-Level): 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 does not work in this mode. [ (Floor): 3-19