How do you change the heater core on a 1991 Chevy Cavalier?

How do you change the heater core on a 1991 Chevy Cavalier? and what all do i have to do to get to it|||mjv, you can pickup a %26#039; haynes %26#039; manual at yer nearest parts shop for about $18 %26amp; these books are really good.It covers all the MAINTENANCE %26amp; repairs. I really push maintenance because it will prevent repairs. A coolant dump %26amp; refill will prevent the corrosian that hurts heater cores.Good Luck =^ )|||pull your dash apart