.I am pretty sure that is a wrecker.
Bill
Those things are awsome, we got one in this area that can rotate to the side similar to a crane, it also has 2 plates with teeth that get chained to the rear bumper and the rear wheels roll onto the plates and basiclly provide incredible traction for winching. I watched it working a couple of weeks ago and I was impressed. They say they get $500 just to fire it up, talk about putting salt on the would, its bad enough you need a wrecker.