TRAVELING WESTBOUND ON INTERSTATE 80 FROM RENO TO SAN FRANCISCO 55-65 MPH, WITHOUT WARNING MY 2010 CAMARO HAD 100 % LOSS OF ALL POWER AND OPERATING FUNCTIONS; OUT OF CONTROL DOWN THE MOUNTAIN DURING HEAVY TRAFFIC I WAS ABLE TO STOP THE VEHICLE BY JAMMING INTO THE GUARDRAIL, TRAPPING MYSELF IN CAR. NOTHING WORKED...NO ONSTAR...I CALLED MY DAUGHTER IN RENO AND TOLD HER TO SEND HELP..I WAS IN SHOCK. I HAD NO CLUE WHAT HAPPENED OR WHY..BUT AFTER THE TRAFFIC SLOWED DOWN I EXITED THE VEHICLE, STILL NO HELP OR RESPONSE. CAR STARTED WITH LIMITED ABILITIES 25 MPH; WAS ADVISED THAT IT WAS OKAY TO DRIVE BACK TO RENO AND "BRING IT ON IN" AT MY CONVENIENCE. NOTHING WAS DONE. THE CAR READY BEFORE THE SHUTTLE GOT BACK TO THE SHOP. THE SERVICE MEN SHRUGGED IT OFF AND TOLD ME TO WATCH FOR THE WARNING SIGNS; I CAN'T HAVE ANY SERIOUS PROBLEMS BECAUSE THEY HAVEN'T HAD ANY ELECTRICAL PROBLEMS WITH THESE CARS ACROSS THE BOARD??!I HAD NO WARNING SIGNS..I AM LUCKY THAT I WAS NOT KILLED AND DID NOT KILL ANYBODY WITH MY IMAGINARY CAR PROBLEMS. 2ND INCIDENT ALL SYSTEMS WENT CRAZY, EXTREME HEAT COMING FROM DASH, NO HEAT TURNED ON, FALSE READINGS, ALL WARNING LIGHTS AND GAUGES WENT OFF, POWER LOCKS DON'T WORK, NO MORE AUTO START I REQUESTED SERVICE WITH NO RESPONSE FOR 5 DAYS. I LEFT A VERY EXPRESSIVE MESSAGE FOR FLEET MANAGER AND SERVICE DEPT FINALLY RESPONDED. BAD SERVICE..RUDE. I PAID OVER 300 FOR CAR RENTAL GM PICKED UP 1 DAY THEY CONCLUDED AGAIN NOTHING WRONG WITH CAR. MALFUNCTION WAS CAUSE