Whats up guys. Im new to this forum and right now i do not own a duramax but i hope to own one soon. What i would like is a lbz. My question is is there any difference between the 06 lbz and the 07 lbz? Does the 07 have to run on the ultra low sulfur diesel? If it does than id rather have an 06 but if it doesnt than id take an 07 because its newer. Also is there any other differences between them such as anything in the aftermarket. thanks.