Helps prevent dirt, rust, and other fuel contaminants from entering the fuel delivery systemSome GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General MotorsGM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicleGM regularly updates production and service part designs to integrate new materials and technologies