It’s a skid plate from OR-Fab, and was designed to protect the urea tank on LML Duramax-powered Chevy’s and GMC’s. With companies already offering lifts for ’11 bow ties, it might be a good idea to have one of these to protect against dents or (worse) punctures while on the trail.
Built from 3/16-inch thick steel, units come with two brackets, all hardware, and don’t require any drilling in order to install them.