GM Genuine Parts Engine Coolant Outlet O-Rings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These O-Rings are formed elastomer gaskets that form the seal between the engine coolant outlet and the engine block or head. Install these O-Rings according to the published service procedures. 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).

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• Helps prevent leakage from the engine coolant outlet
• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
• Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
• GM regularly updates production and service part designs to integrate new materials and technologies