GM: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. POLICE EQUIPMENT INOPERATIVE. CERTAIN 2012 MODEL YEAR CHEVROLET IMPALA POLICE VEHICLES MAY HAVE A CONDITION WHERE A SHORT CIRCUIT MAY DEVELOP IN THE INSTRUMENT PANEL WIRING HARNESS, NEAR THE ACCESSORY WIRING JUNCTION BLOCK, LOCATED UNDER THE HOOD. *JS
