Katelyn, sorry to hear of your troubles. I hesitated posting at first, as I don't want to be the bearer of bad news. When the heater core went on my 98 jeep grand Cherokee, I was told it would be $ 5-600, with the parts being $280 and 6-7 hrs labor, NOT the ridiculously low 30-40 that was just posted above. The heater core is buried under the dash, requiring it to be removed. In addition, the AC unit was part of it, meaning the refrigerant needed to be bled out and captured, disconnected, and recharged after the core was put in. On top of everything else, if air gets trapped in it during the process, it can be a nightmare "burping" it out. The Hayes manual I bought for the jeep ( similar to a chiltons manual) said that this was in no way recommended for backyard mechanics. I have done tons of smaller work, have a bunch of tools, and have been in the building trades for 26 years. I didn't do mine, as a mater of fact, I got tired of dumping money into it and traded it in. It's great that someone
will volunteer go help out, but be wary of " if it sounds too good to be true, it probably is"
Les