2012 CHEVROLET VOLT Structure Problems

THE STANDARD CHARGE CORD UNIT SUPPLIED WITH THE VEHICLE BY THE DEALER HAS FAILED TWICE, AND I BELIEVE IT POSES A FIRE RISK. THE FIRST OCCURRENCE WAS 9/1/12 AT APPROX. 18,000 MILES. CORROSION WAS NOTED ON THE PLUG. THE DEALERSHIP TECHNICIAN BLAMED RUST FROM A RECENT RAINSTORM AND REPLACED THE CHARGE CORD UNIT. THE SECOND OCCURRENCE WAS YESTERDAY AT 32,350 MILES. THE CAR SUDDENLY STOPPED CHARGING. ON INSPECTION THE CHARGE UNIT AND CORD WERE EXTREMELY HOT, HOT ENOUGH TO HAVE POTENTIALLY CAUSED A BURN OR AN ELECTRICAL FIRE IN MY GARAGE. OVER THE PAST 2-3 MONTHS, I HAVE NOTED GRADUAL ONSET OF CORROSION ON THE OUTLET AND THE CHARGER PLUG. (OF NOTE, THERE HAS BEEN NO RAIN HERE IN LAS VEGAS FOR SEVERAL MONTHS). THE DEALERSHIP REPLACED THE CHARGE CORD UNIT TODAY. I COMMENTED TO THE SERVICE TECHNICIAN THAT I BELIEVE THERE IS A PROBLEM USING SOLELY THE 110 VOLT...