Rear Auxiliary HVAC Control Assembly
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Rear auxiliary HVAC control assembly is located overhead, behind front seats. When front auxiliary HVAC control is set to REAR CNTL, rear auxiliary HVAC control assembly regulates temperature, auxiliary blower motor speeds, and air delivery mode through upper and lower outlets or a combination of both. See Fig 1.