How do you replace a heater core in a 1995 Chevrolet beretta?

To replace the heater core in a 1995 Chevrolet Beretta, start by disconnecting the battery and draining the coolant from the radiator. Next, remove the dashboard and the center console to access the heater core housing. Disconnect the hoses from the heater core, unbolt it from the housing, and then install the new heater core in reverse order. Finally, reassemble the dashboard and refill the coolant, ensuring there are no leaks.