How do you get heater core out 1990 Oldsmobile 88?

To remove the heater core from a 1990 Oldsmobile 88, first disconnect the battery and drain the cooling system. Then, remove the dashboard and the center console to access the heater core housing. Disconnect the heater hoses from the engine compartment, unbolt the housing, and carefully pull out the heater core. Make sure to replace any seals or gaskets during reinstallation to prevent leaks.