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It is found behind the glovebox on the fire wall inside of the black box, you need to take the glove boxout to get to the box , then take the screws out of the box to find the heatercore, when box is apart inside you will find the heatercore, there are 2 hoses the you will need to separate then remove the lines to the heatercore then remove the core and repret the same in reverse oder

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12y ago
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Q: How do you change a heater core on a 1984 Chevy truck?
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