How do you change a thermostat on a 2007 Chrysler van?

To change the thermostat on a 2007 Chrysler van, first, ensure the engine is cool and disconnect the negative battery cable. Drain the coolant from the radiator, then remove the hoses connected to the thermostat housing. Unscrew the housing, replace the old thermostat with a new one (ensuring the gasket is in place), reassemble the housing and hoses, and refill the coolant. Finally, reconnect the battery and start the engine to check for leaks.