2008 Chevrolet Suburban Owner's Manual - Page 208

Mode Knob The right knob on the control panel allows you to choose the direction of air delivery. H (Vent): This setting directs the air through the headliner outlets. Air is delivered through the floor outlets as well as the headliner outlets. The rear system floor outlets are located directly behind the second row seats. The flow can be divided between vent and floor outlets depending upon where the knob is placed between the settings. ) (Bi-Level): Fan Knob Turn the left knob clockwise or counterclockwise to increase or decrease the fan speed. Turn the knob all the way counterclockwise to turn the rear system off. 6 (Floor): This setting directs most of the air through the floor outlets. The rear system floor outlets are located directly behind the second row seats. Temperature Knob The middle knob on the control panel lets you select the temperature of the air flowing into the passenger area. Turn the knob clockwise toward the red area for warmer air. Turn the knob counterclockwise toward the blue area for cooler air. 3-34