Your heater core is inside the big black box under the dash on the passenger side. you'll have to pull the dash out. then remove the black box, usually there are bolts on the firewall in the engine bay that hold it in place.disconnect the ac lines and heater hoses. remove the box and then the screws all the way around it to open it up. replace the heater core and reassemble. you'll have to recharge the freon when you are done to have ac again.
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