2006 GMC 4500 Box Truck, Turbo Diesel. Installed an Isuzu NPR motor from JJ ReBuilders in 2013 with only 33,000 miles and we"ve put about 55,000 miles on it since. Has a Boss subwoofer and amp, Pioneer Stereo and power windows. Truck runs great. Lift gate and side slider door on 18" box. Back roll up door was installed within the last few years.