I purchased my six gun diesel tuner in 06 before I took delivery of my 3/4 4x4 crew cab Duramax truck. I also installed Banks cold air induction,and Banks cat back exhaust system. It was easy to install , any one can do it, My truck was new so,no dirt in your eyes. I put the tuner on level six and have not moved it since. The first year I had to purchase three new sets of tires. My truck now has 260,000 miles and is ten years old ,it will still out perform any new pick up I've come across. I tow a 11,000 pound 5th wheel 75mph and 10,000 pound tractor at 75mph.