2003-08. 5311. CLOTH TRIM (V9). Cover. Front Left. Left.QUAD CAB. Left.REG & QUAD CAB. A cover used to replace the original equipment seat back cushion cover of a vehicle’s seat. Seat Belt Receptacle Cover. Trim that covers the folding seat latch. Trim that covers the hinge between the seat back and seat bottom. Back Cushion. Belt Receptacle. Hinge. PLATE. Shield.