this is a great running gmc 3500 4x4 wrecker. it has a 6.5 diesel engine that runs perfect, there is a 480le transmission that works perfect. it has a 8 ton century back with a twin line boom. it has a independent wheel lift that also works perfect. the extendable boom has 1 cyl leaking when it sits for a long time, this truck is part of our fleet and we have owned this truck for many years and it is not used anymore. the tunnel box door on the passenger side was replaced with a peice of metal because the old door was damaged. this is a good reliable truck for someone . any questions call me at 215 768 2174 joe