Selling my truck, 2006 GMC Sierra Denali AWD. It has 6.0L (LQ9) engine and 4L65E transmission. Has flow master muffler and K&N cold air intake. Truck runs very strong and has no issues. Rockford Fosgate 4 channel amp, with four 6.5in alpine type R door speakers and a pioneer deck. Has a nice self locking tonneau cover. Fresh brakes with upgraded rotors(slotted and drilled) and bigger rotors up front. Only selling due to - I'm getting a heavier trailer setup for my race car and need a 2500. Thank you for looking.