[. . . ] [. . . ] For correct fit, it is necessary to remove the factory floor mat before installing your new floor liners. Your liners are made from an engineering resin that is lightweight and extremely tough and durable. Use of Armor All®, Son-of-a-Gun® or similar items is discouraged as these products make the liners slick. INSTALLATION INSTRUCTIONS FOR YOUR CHEVROLET/GMC TRUCK SECOND SEAT FLOOR LINER FRONT OF VEHICLE LEFT OR DRIVER'S SIDE RIGHT OR PASSENGER'S SIDE NOTICE: RIGHT LINER OVERLAPS LEFT LINER 6135. DOC Rev: 0 02/01/01 [. . . ] [. . . ]