This Fuel Pump Relay is a genuine ACDelco part with OE/OEM part number 25530733 and manufacturer part number 15-8271. It fits Buick, Cadillac, Oldsmobile, and Pontiac vehicles. The relay is brand new old stock and has never been used before. It is designed specifically for the mentioned vehicles and is not a universal fitment. The relay is compatible with Fuel Pumps & Sending Units and Air & Fuel Delivery systems. Purchase this reliable and high-quality relay for your vehicle today.