Will a chevy 1500 front bumper fit a 2500?

The Chevy 1500 series front bumper will not fit onto a Chevy 2500 series truck without doing extensive modifications. The mounting brackets that the 1500 series bumper uses are not present on the frame and body of the 2500 series so You will have to add those. There are shops that specialize in mounting the bumper to Your truck but if You prefer the look of the 1500 series bumper then there are other options as well. There are third party aftermarket bumpers that come with the same look of the 1500 series truck but will bolt right into the stock mounting points on Your 2500 series.