my truck started life as a 2007.5 gmc sierra 2500hd. over the passed two years i have made it into my own denali duramax diesel tow rig/cruiser/toy/show truck. it is the first year for the lmm engine and i love it. it has the lmm 365 hp with the 6 speed alison trans and i have added the quadzilla stealth 2 tunner with the dpf delete software, a full 4in tubro back dual exhaust, airaid intake, a set of micky thompson classic 2 18x9 wheels with nitto terra grappler tires 285/60r18 and a set of keyways and shock extions on the front to level it out, a pace edwards rollup bed cover and tko spray in bed liner, chrome door handles and custom grill, a set of denali running boards and mud flaps, led tail lights, and the best part an onboard air system with a 5 gallon tank an triple train horns, on the inside a set of white faced gauges, autometer phantom 2 boost and egt gauges, and 150 psi air gauge for the air system, custom mounted cb, a indash eclipse touch screen nav unit with 7.5in screen and backup camera. that is the big stuff with a bunch of little stuff i have done and more to come.