I have a 2005 aveo and the serpentine belt broke the replacement belt I am told is a 740k6 which I found to be about 8 inches to long and yes I have the routing diagram. The belt that I found that fits is a 653k6 the next size smaller is a 650k6 which is definitely to small . I also replaced the tensioner but I still think the belt is a little to loose because it squeals intermitently are there any other adjustments other than the tensioner? Or anyone else out there encountered this problem before ? Any solutions?