Shortlines don't have a lot of money to spend, so they need to maximize their investment. Case in point - you start off with the standard GMC 4x4 crew cab, add hi-rail equipment, box for the bed, ditchlights, emergency lamps... and you're ready to hit the rails in style! Sound like a great projects for a TV show like Trucks.
One thing I don't understand though - why bother with the front bumper when you can have this facia instead:
http://tinyurl.com/2s224e
PS. You know you railfan CN too much if you recognize a grey 60' high-cube IC boxcar in the back.