The heater core on our 2009 F-150 is leaking. The dealer wants $1200 labor to replace this $100 part! Does anybody know where I can find instruction so I can replace it myself?

Here are the instructions for replacing the blend door, but the proceedure is the same as far as accessing the heater core. http://www.f150online.com/forums/articles-how-s/397310-blend-door-replacement-pictures.html

That's for 97-02 trucks. I wonder if an 09 would be the same?

I didn't realize it was for the older trucks.... Sorry about that. I will look around some more and see what I find.

Would this help?