ON NOVEMBER 24TH 2017, WHILE STOPPING TO MAKE A RIGHT TURN, MY 2016 EXTENDED CAB, CHEVROLET COLORADO 4WD TURNED ITSELF OFF. WITH THE BRAKES NOT WORKING AND INTO THE INTERSECTION OF A 4 WAY STOP, I PUT THE GEAR IN PARK TO STOP THE VEHICLE. I RESTARTED AND EVERYTHING WAS NORMAL. NO ACCIDENT AND NO INJURIES. ON NOVEMBER 28, 2017, ON MY WAY HOME FROM WORK, WHILE DRIVING STRAIGHT IN TRAFFIC ON US /ROUTE 40 IN MARYLAND, MY COLORADO TURNED ITSELF OFF, BRAKES DIDN'T WORK, RESULTING IN REAR ENDING THE VEHICLE STOPPED IN FRONT OF ME. THE BRAKES DID NOT WORK, THE AIR BAGS DID NOT WORK (DID NOT DEPLOY). THERE WAS SIGNIFICANT DAMAGE TO MY COLORADO, AND I HAVE CHEST BONE (STERNUM) INJURIES.