ACDelco GM Original Equipment HVAC Control Panels, or control heads, translate the user’s commands into mechanical, vacuum, or electrical signals to operate the blower fan and the blend, mode, and recirculation doors. Some systems with automatic functions have an integrated or remotely mounted computer module that monitors the control head inputs and the cabin and duct temperatures to adjust the blower speed and door positions to maintain the desired cabin temperature. This original equipment control panel is a GM-recommended replacement for your vehicle’s original components and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.