How do you replace thermostat on 2003 tc 3.8?

How do you replace thermostat on 2003 tc 3.8?
Should be located in a removable housing at the engine end of the upper radiator hoseDrain about 1 gallon of coolant from the radiatorRemove this housingNote how thermostat is installedClean both surfacesReplace thermostat and gasketReplace housingStart engine and look for leaksRun engine to normal operating temperature with heater onRe-check coolant level