Where is the thermostat housing on a 2001 dodge ram 2500 van?

The thermostat housing on a 2001 Dodge Ram 2500 van is located on the front of the engine, on the passenger side of the vehicle. It is a round, black housing that is connected to the engine block by a hose. The thermostat is located inside the housing, and it is responsible for regulating the engine's coolant temperature.