Hi guys,
My bro-n-law has a 07 LMM Duramax 2500 4X4. It has 130k miles on it and has been very well cared for. Only mods are a hyper tech programmer, S&B cold air intake, and he just added a ATI tq converter. He took it to the 1/8 mi track last night and I think it's capable of much more. He...