Look at the details on the truck, the panel thickness, the thin headlight rings, the rear suspension bolts, the mirror mount. Either real or a VERY well done and large scale model.
I'm sticking with real.
I was thinking of that too, and the fender edges almost had me thinking, but something about this just sits on my shoulder and whispers "model" in my ear..
Ill say model, just because something aint feelin right