I just purchased a 2011 Chevy Silverado 1500WT (Work truck), 4WD, standard cab, longer bed. I want to install one of my full-size Whelen Liberty lightbars on it. I am unable to locate a Whelen part number for the mounting hardware. Can someone give me the part number for the brackets that are attached behind the weatherstrip at the top of the doors? I have a set from my 2005 Tahoe (325 miles away at the moment) . Are they the same part as the 2011 Silverado mounting brackets?