Well it looks like Monday is my big day. I'm picking up a new to me Duramax (see sig). The truck has a clean CarFax, test drove well, and passed a mechanic inspection. Now with 190,800 miles on it and the CarFax reports no major work done on it I anticipate I'll have some kind of repair in the next year or two. Can anyone give me a little hint on what that will most likely be and approximate cost?