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It is a tough job, you will need to remove your front seat, it will be nearly impossible if you don't have all the room that you will need. It will be difficult to work with the front seat in place but, if you do it, it can be done. I say remove the seat because it will be much easier to work without it. there are only four bolts holding it on anyhow. Okay, let's get down to it. You will need to remove your inner fender skirt (the plastic fender)You will need to remove all the bolts and or nuts holding your fan blower cover to the firewall, there are either eight or nine to remove. After those are removed, take off the housing, also take off the ground and your realay switch,go to the interior of the car and wiggle the interior plastic housing loose, now comes the tricky part, there are small screws holding an aluminum cover over the heater core, remove all these small screws, also remove any rubber grommets, now wiggle that loose, you can use a screw driver to get it loose where it is stuck, DON'T force it, now reach in a pull out the heater core, go in reverse to put it back together. Hope this helps, I just did one myself.

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Q: How do you change a Monte Carlo heater core?
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