How do you replace heater coil in 2003 pontaic aztek?

To replace the heater coil in a 2003 Pontiac Aztek, first, disconnect the negative battery cable and drain the coolant from the radiator. Remove the dashboard and center console to access the heater core housing, then detach the hoses connected to the heater core. Replace the old heater core with the new one, reattach the hoses, and reassemble the dashboard and console. Finally, refill the coolant and reconnect the battery.