NHTSA Complaint #11063959 — 2011 CHEVROLET IMPALA

ON TWO DIFFERENT OCCASIONS, ONCE ABOUT A YEAR AGO AND AGAIN TODAY, MY 2011 CHEV IMPALA LTZ DISPLAYED A SERIES OF ROTATING ALERT MESSAGES -- 1. SERVICE TRACTION CONTROL 2. SERVICE STABILITRAK 3. ENGINE POWER IS REDUCED. I WAS DRIVING ABOUT 45 MILES PER HOUR ON AN OPEN ROAD WHEN ALL OF A SUDDEN THE ENGINE STARTED RUNNING VERY ROUGHLY AND SLOWED DOWN AND THE ABOVE 3 MESSAGES REPEATEDLY DISPLAYED ONE AFTER THE OTHER. ALSO 2 YELLOW LIGHTS WERE FLASHING AND THEN REMAINED ON -- THE CHECK ENGINE LIGHT AND THE TRACTION CONTROL LIGHT (I THINK). WHEN I REPORTED THIS PROBLEM TO THE CHEV DEALERSHIP A YEAR AGO, I WAS TOLD THAT BECAUSE THE WARNING LIGHTS AND MESSAGES COULD NOT BE REPRODUCED IN THE SERVICE DEPARTMENT, THERE WAS NOTHING THAT THEY COULD DO. (AND I UNDERSTAND THAT IF IT ISN'T BROKEN WHEN I TAKE IT IN, THE SERVICE DEPT WOULD MOST CHALLENGED TO FIX IT.) TODAY, WHEN THIS HAPPENED I WAS ABLE TO GET THE CAR TO A SAFE PLACE TO PARK. I TURNED OFF THE IGNITION, WAITED A MOMENT AND THEN RESTARTED THE CAR. THE SAME 3 MESSAGES WERE DISPLAYED WITH THE TWO YELLOW LIGHTS STAYING ON. WHEN I RESTARTED THE CAR 3 OR 4 HOURS LATER, ONLY THE CHECK ENGINE LIGHT IS DISPLAYED. THE 3 REFERENCED ALERTS WERE NOT DISPLAYED. I AM GETTING READY TO TAKE THE CAR TO THE DEALERSHIP AGAIN WITH THIS PROBLEM. DO YOU HAVE ANY ADVICE AS TO HOW TO PROCEED?