3.6 LITER. AUXILIARY. Solenoid valve. A Valve used to Control the flow of engine coolant to the heater core. Automatic Transmission Oil Cooler Control Valve. HVAC Heater Control Valve Solenoid. To Auxiliary Radiator Hose. Automatic Transmission Oil Cooler. HVAC Heater. Water Hose. Included with: Hose assembly.