THE VEHICLE SPUN OUT OF CONTROL AND HEADED TOWARDS LEFT SIDE WHILE PERFORMING A ROUTINE LANE CHANGE. THERE WERE NO ADVERSE WEATHER CONDITIONS, NO UNUSUAL TRAFFIC PATTERNS, AND I WAS NOT GOING ABOVE THE SPEED LIMIT. I WAS IN THE FAR RIGHT LANE ON A FOUR LANE HIGHWAY, WHEN THE VEHICLE STARTED VEERING LEFT, I TRIED EVERYTHING IN MY CONTROL TO STEER THE CAR AWAY FROM THE MEDIAN, BUT TO NO AVAIL, MY VEHICLE SIDESWIPED THE MEDIAN, AND THE LEFT REAR WHEEL FELL OFF. SINCE I WAS TRYING TO STEER RIGHT, THE WHEEL FINALLY RESPONDED AFTER SIDESWIPING THE MEDIAN, AND I HAD TO STEER LEFT AGAIN TO AVOID HITTING ANOTHER VEHICLE, AT WHICH POINT, IT SPUN 180 DEGREES AND CAME TO A COMPLETE STOP ON THE SECOND FARTHEST LEFT LANE FACING ONCOMING TRAFFIC. I WAITED FOR A BREAK IN TRAFFIC, AND QUICKLY PULLED THE VEHICLE TO THE LEFT SHOULDER WITH ONLY THREE WHEELS. I DO NOT KNOW WHAT WENT WRONG, AS I HAD NOT DONE ANYTHING OUT OF THE ORDINARY OTHER THAN PERFORMING A LANE CHANGE TO THE NEXT LANE. THE DEALERSHIP CLAIMS EVERYTHING LOOKS "CONNECTED" BUT I BELIEVE DEFECTIVE PART OR PARTS CAUSED THE ACCIDENT, I WOULD APPRECIATE AN INVESTIGATION TO POSSIBLE CAUSES. THE VEHICLE WAS BRAND NEW, AND I WAS VERY CAREFUL WITH IT, I DON'T BELIEVE THIS HAPPENED BECAUSE OF SOMETHING I DID. I HAVE FILED A REPORT WITH CHEVROLET, AND AM AWAITING THEIR RESPONSE. THANK YOU.