Auxiliary HVAC Control Module
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The auxiliary HVAC control module provides blower, air delivery mode and air temperature settings. When the auxiliary position is selected, from the HVAC control module, inputs from this control assembly will be processed by the Aux. HVAC control module. If equipped with rear seat audio (RSA) the auxiliary HVAC system will support GMLAN.