Shop 1998 Buick Century Sill. (Front, Rear, Upper, Lower). #4. Rear. SEDAN, rear. Upper. REAR BODY and FLOOR, BODY, Pan, RAILS - OEM Buick Part # 22813256 (15115647)

Floor Sill. Supporting sheetmetal structure attached to the underside of the Floor pan. Center c'member. Cross bar. Floor Pan Crossmember. Frame. Panel. Plate. REINFORCED.

Floor Pan CrossmemberFloor Sill

#4. Rear. SEDAN, rear. Upper.