2008 Hummer H2 Owner's Manual - Page 180

+/− (Increase/Decrease Temperature): These buttons select the temperature of the air flowing into the rear passenger area. Press the + button for warmer air and press the − button for cooler air. The temperature settings will display in 0-12 increments, going from the coolest (0) to the warmest (12) setting. N (Mode): Press the mode button to manually change the direction of the airflow in the vehicle. Repeatedly press the button until the desired mode appears on the display. Multiple presses cycles through the delivery selections. This mode directs air through the headliner outlets. H (Vent): Rear Climate Control with Rear Seat Audio Controls ) (Bi-Level): Manual Operation This mode directs air through the floor outlets as well as the headliner outlets. The rear system floor outlet is located at the passenger side rear quarter trim panel. This mode directs air through the floor outlets. The rear system floor outlets are located under the seats. DC (Fan): The fan buttons on the rear seat audio control panel let you manually adjust the fan speed. Press D to increase airflow and C to decrease airflow. 6 (Floor): 3-30