Demco Classic Baseplate For Chevrolet Tahoe 1500 2007 2012 4Wd & Chevrolet/Gmc 1500 New Style 2007 2015 2Wd/4Wd 4/9 9518200. Demco's engineers use Finite Elemental Analysis (FEA) when testing our baseplates for strength functionality and durability....