Restore the sound quality of your audio system ^^ Some 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 Motors ^^ GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle ^^ GM regularly updates production and service part designs to integrate new materials and technologies