Hemigmshit

What year is the truck you installed the step bumper to? I am trying to install the same bumper onto my 2500 Silverado 2013, but the Holes on the brackets from the new bumper dont match with old Holes on the old brackets and that makes the holes from the chasis not align With new bumper holes except for the very top bolt that one went in well. Im thinking of just drilling half new half in holes on to the bracket and call it a day since the bumper didn't “bolt on” directly. I also read the bed size on the 13 where different size from the newere models and that could be my problem. If I could get some feedback. Thank you