GM Genuine Parts 87839866 Radio AM Antenna Signal Filter Module

["Optimizes radio signal","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"]