I might need a new bumper since this one is tweaked a bit (looks like the previous owner backed into his trailer or something) and was wondering what it would take to equip a truck with the sensor system? Can I just get the bumper, wires and whatnot from a junk yard plug em in and get a flash and viola or is it more complicated?

You do know that the bumper can be purchased piece by piece, and as such, perhaps, loosening and retightening can be done, or buy just the bad part. As for the sensors, I have no clue as to what it takes.