Buy OEM Oldsmobile Part # 84539149 (84509626, 85012087). Seat Hinge Cover. CENTER SEAT-A52, outer. CENTER SEAT-A52, outer, black. CENTER SEAT-AE7, outer, black. CENTER SEAT-AZ3, LOWER COMPONENTS

Inner cover. Seat Hinge Cover.
Trim that covers the Hinge between the Seat back and Seat bottom.

Seat Hinge Cover

Fits Sierra 1500, Sierra 1500 Limited, Sierra 2500 HD, Sierra 3500 HD, Silverado

CENTER SEAT-A52, outer. CENTER SEAT-A52, outer, black. CENTER SEAT-AE7, outer, black. CENTER SEAT-AZ3, LOWER COMPONENTS, outer, black. CENTER SEAT-AZ3, outer, black.