GM Genuine Parts Multi-Purpose Seals are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These seals help seal in lubricant and help keep dirt and water out. Made from rubber or plastic composite materials, they conform to the sealing surface to help provide leak-free operation. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).