Sorry that my second post is a "help me post". As I am rather new to wrenching on Subs, I don't have anything to contribute. I have a leak under the glovebox. From the searches I have done, it seems to point to the heater core. When I touch the plastic area under the glove box it's hot to the touch and I was using A/C and not heather. Is this heat normal or is it an indication of a bad core? Also, is there a diy on the replacement? Is there a manual that you guys recommend I get to help me in my siy efforts? Thanks for any advice you can provide me.