ON NOVEMBER 4TH, 2015- WHEN WE STARTED OUR CAR A LOUD POPPING SOUND WAS HEARD, IMMEDIATELY WE TURNED THE IGNITION OFF. THINKING MAYBE IT WASN'T THE CAR THAT MADE A SOUND, WE RESTARTED THE CAR. THE RPM'S SHOT UP AND WHITE SMOKE STARTING FILLING THE INTERIOR OF THE CAR. TURN IGNITION BACK OFF AND JUMPED OUT AND OPENED THE HOOD, THINKING IT MAY HAVE BEEN THE RADIATOR THAT CRACKED. THE ENGINE COMPARTMENT WAS ON FIRE. FIRE WAS EXTINGUISHED. RECALL 15757 WASN'T RECEIVED UNTIL DECEMBER 2015. I TRIED TO REACH A LOCAL GMC DEALERSHIP ABOUT THIS ISSUE, HAVE NOT RECEIVED A CALL BACK YET.