2012 CHEVROLET CAPTIVA Vehicle Speed Control Problems

GOING DOWN ROAD AT 70MPH AND VEHICLE SLOWS DOWN TO 40MPH ON ITS OWN AND I ALMOST WAS REAR ENDED BY THE CAR BEHIND ME. THIS HAPPENED ON A MAJOR HIGHWAY.

PROBLEMS STARTED WITH RADIO GOING OFF. THEN LIGHTS DIMMING WHEN USING THE WINDOW SWITCH. THEN WHILE USING THE TURNING SIGNAL, THE CRUSE WOULD SHUT OFF. THEN DRIVING AT NIGHT THE LIGHTS STARTED FLICKERING THEN SEEMED TO TURN OFF. THE CAR SEEMED TO LOOSE POWER. THE BREAK LIGHT WOULD COME ON THEN GO OFF. THE SEAT BELT LIGHT AND CHECK ENGINE. THE WARNING BELL THAT SOUNDS WHILE THE KEY IS IN IGNITION WOULD GO OFF AND MESSAGES WOULD FLASH ACROSS THE RADIO AND THE INFORMATION ON THE DASH WOULD SCROLL WITH OUT YOU SCROLLING THEM. TODAY THE CAR DECELERATED IN A BUSY INTERSECTION AND THE CAR LOCKS WENT UP AND DOWN. ON THE WAY HOME, THE CAR WAS DEAD AND I COULD NOT REMOVE THE KEY. CALLED A TOW, THEY JUMPED THE CAR, IT STARTED. ON THE WAY TO THE REPAIR GARAGE, THE CAR DIED IN THE ROAD. CALLED FOR A...

CAR WAS DRIVING FINE WENT INTO A STORE CAME OUT KEYLESS ENTRY WOULD NOT WORK, OPENED DOOR WITH KEY AND CAR WOULD NOT START. CALLED FOR A JUMP BUT BEFORE THE PERSON CAME THE CAR STARTED OUT OF THE BLUE. I NEVER ATTEMPTED TO START THE CAR AGAIN BUT HAD INADVERTENTLY LEFT THE SWITCH TO THE ON POSITION. I TOOK THE CAR INTO GOOD CHEVROLET FOR SERVICE AND WAS TOLD THAT MY CAR'S BRAINS WERE BASICALLY SCRAMBLED. I WAS TOLD THAT THE PCM, BANK 1 SENSOR 2 OXYGEN SENSORS WERE REPLACED AND THAT ALL CODES WERE CLEARED AND THAT THE REPAIR WAS VERIFIED. I PICK THE CAR UP ON 8/14/14 DROVE IT ON 8/15/14 AND THE SAME THING HAPPENED AGAIN ONLY THIS TIME THE KEY WOULD NOT COME OUT OF THE IGNITION AND ALL POWER WAS LOST. AGAIN I SAT THERE AND WAITED AND ABOUT 15-20 MINUTES LATER THE CAR...