Today, in this 2011 GMC Sierra Extended Cab, we're going to install and review part number HL53101. This is Husky liners exact contour custom auto floor liners in black. Start off, we need to go ahead and remove any preexisting floor mats, or liners. These liners are designed to work directly with the factory carpet. We'll go ahead and put it into place. Obviously, not much to install.… see more >