I have a 2009 GMC c8500 with a 7.8 l diesel. Has about 165,000 MI runs very well and well maintained. Driving it daily it"s tagged and ready to go to work. Box is 24 ft. 7ft 3 inches is part of the lift. The truck was owned by Frontier.com. value of this truck is $19,500. The back 62 in of the floor elevates down to the ground Also have video of the lift,