Durafit Seat Covers, C1100-C8, 2003-2007 Chevy Silverado and GMC Sierra, Work Truck Seat Covers, Front 40/20/40 Split Seat with Manual Controls and Without Console, in Charcoal, Endura Fabric 2003-2007 Chevy Silverado and GMC Sierra Work Truck Seat Covers in Gray Endura Front 40/20/40 Split Seat Manual Controls and Without Console. Integrated Seat belts on top of the seats Made in Charcoal Waterproof Endura Endura is a heavy duty, tightly woven material made of an extremely durable polyester. Ideal for industrial and open top vehicles, it is water resistance, pet proof and work truck ready. This material is often used in outdoor backpacks and soft side luggage. Endura offers full protection for your vehicle's interior but is stiffer than some of our other fabrics.