How do you change the heater core on a 2000 Dodge Neon?

To change the heater core on a 2000 Dodge Neon, first, disconnect the negative battery terminal and drain the coolant. Remove the dashboard and center console to access the heater core housing, then disconnect the heater hoses from the core. Remove the screws or bolts securing the heater core, take it out, and replace it with a new one, reassembling everything in reverse order. Finally, refill the coolant and check for leaks.