I'm selling the tuner off of my truck, it is about 2 months old and works AWESOME. Excellent for towing and hauling. This tuner allows you to adjust tire size, remove speed limiter and switch power levels On-The-Fly WITHOUT USING AN OUTLOOK MONITOR!!! Comes with all original instructions, case, and stickers. Works on LB7, LLY, 2003 and up 5.9 Cummins, 2003 and newer 6.0 Powerstroke. Will work on LBZ when the new update is released!!!!!