GMPartsGiant.com offers the wholesale prices for genuine 1998 Oldsmobile Silhouette parts. Parts like Weatherstrips are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.4L. Model Code: 2/SLIDING DOORS, EXT, EXT 2/SLIDING DOORS, SILHOUETTE.