No, this isn't a Cat D-6; it's a building, the office of United Rentals in the central California town of Turlock. You'll see this interesting landmark as you travel on busy CA 99, just north of Lander Ave.  You still think it's a D-6?  Look on the left side, just behind the radiator... that dark rectangle is a large window.  Note the building and the tree in the background.  Yes, it's really a building and not a D-6!  This photo was taken with existing light at 0200, on the way to a railfan trip to Tehachapi.  Well, whatever this thing is, it's an interesting piece of graffiti.