This auction is for a NOS oil filler cap in perfect condition. Stant part # SO74. This is a NEW factory original " MADE IN THE USA " quality part in the original factory package.  Will fit 1978 1979 1980 1981 1982 1983 1984 Buick ( all ) w/ 4.3L, 5.7L diesel engines; 1978-84 Cadillac, Chevrolet, Oldsmobile and Pontiac all with diesel engines. Also fit 1978-84 Chevy and GMC Trucks w/ diesel engines. Combined shipping discounts apply on multiple purchases whenever possible. Questions are always welcome, so don't hesitate to ask. I have been selling on eBay for over 22 years and have a 100% positive feedback rating, so buy with confidence. Please be sure to check out my eBay store for more Vintage & Classic parts, accessories and auto literature. I list a large variety of NOS, NORS and quality used parts every week, so check back often.