2007 GMC Envoy Owner's Manual - Page 187

To change the current mode, select one of the following: H (Vent): This mode directs air to the instrument panel outlets. ) (Bi-Level): This mode directs about half of the air to the instrument panel outlets; then directs most of the remaining air to the floor outlets. A little air is directed toward the windshield and the side window outlets. Cooler air is directed to the upper vents and warmer air to the floor outlets. 6 (Floor): This mode directs most of the air to the floor outlets with a little air directed to the windshield and the side window outlets. The recirculation button cannot be selected while in floor mode. @ (Recirculation): Recirculation mode is used to recirculate the air inside of your vehicle. When this button is pressed, an indicator light in the button will come on to let you know that it is active. Use this mode to help prevent outside odors and/or dust from entering your vehicle or to help cool the air inside of your vehicle more quickly. The air conditioning compressor will also come on when this mode is activated. While in recirculation mode, the windows may fog when the weather is cold and damp. To clear the fog, select either the defog or defrost mode and increase fan speed. Defog and defrost modes are described later in this section. 187