I am curious if the Suburban rear a/c unit is a stand alone unit or does it require the engine run a/c compressor and so on. I am interested in putting one in my Blazer and want to keep from having to put all that a/c crap attached to my engine again. If it's not a stand alone, does anyone have any other ideas to getting a/c besides the original. I have been trying to find something like a roof mounted one from a motorhome but i'm not sure I want that on my roof. I would do it if I could get it cheap enough. I live in Florida and it's 95 right now and would sacrifice looks for comfort.