2015 Buick Enclave Powertrain & Transmission Problems

The dealership is unable to identify the failing component or system. The vehicle shuts off while driving above speeds of 60mph, which causes the power steering pump and power brake pump to fail. This symptom of shutting off while driving creates a significant life safety risk for the driver, passengers, and other motorists. The vehicle has been inspected by the dealership over 4 times in 3 months. Since the vehicle shuts off, there are no warning lamps, messages or other symptoms prior to the failure.

WHILE DRIVING MY 2015 ENCLAVE THE VEHICLE JERKS AND THE ENGINE LIGHT COMES ON. THEN STARTS RATTLING AND STEERING WHEEL LOCKS AND MY SPEED REDUCES TO 40, 25 THEN 10-5 MILES PER HOUR, THE WARNINGS READ ENGINE POWER REDUCED, TRACTION CONTROL OFF, SERVICE STABILLITRAK. I PULL MY CAR ON THE SIDE OF THE STREET, WAIT A FEW MINUTES AND SOMETIMES TURN ON MY CAR AND RATTLES AGAIN. NEED TO WAIT A FEW MORE MINUTES AND THE STARTS, THE ENGINE LIGHT STAYS ON FOR A FEW MINUTES, MAYBE COUPLE HOURS OR FOR A DAY AND THEN CLEARS UP. I TOOK IT TO MY MECHANIC AND NO CODES CAME UP. MY MECHANIC SUGGESTED TO DO A FULL SERVICE ON MY CAR WHICH I DID AND STILL HAPPENING. THIS HAS HAPPENED SEVERAL TIMES, WHILE I'M ON HIGHWAY OR CITY STREETS. . VERY, VERY DANGEROUS. THE VIDEO AND PICTURES PROVIDED ARE FROM MARCH/02/20, BUT I HAVE THIS PROBLEM SINCE FALL LAST YEAR( IS WHEN I FIRST TOOK IT TO MY MECHANIC AND PERFORMED A FULL SERVICE, PICTURE PROVIDED) AND LAST TIME HAPPENED TO ME WAS JUNE/15/2020. *TR

BATTERY HAS BEEN REPLACED TWICE IN 20 MONTHS DUE TO FAILURE OF CHARGING SYSTEM TO RECHARGE BATTERY. TURN SIGNALS DO NOT WORK PROPERLY OR AT ALL. DEALER SAYS BATTERY IS "DEFECTIVE". LOW ENGINE RPM TO INCREASE FUEL MILEAGE AND AUTOMATIC ILLUMINATION OF DRIVING LIGHTS END UP TO BATTERY BEING IN A CONSTANT DISCHARGE STATE LEADING TO FAILURE. SIGNAL LIGHTS WILL SLOW DOWN OR STOP ALTOGETHER WHILE SITTING AT A STOP LIGHT. THE VEHICLE HAS LEFT ME STRANDED SEVERAL TIME BECAUSE IT WILL NOT RESTART - THERE IS NO WARNING THAT FAILURE IS IMMINENT. POOR DESIGN IN ONE SAFETY FEATURE LEADS TO A FAILURE OF ANOTHER SAFETY FEATURE AND EVENTUALLY TO FAILURE OF THE VEHICLE ALTOGETHER. THERE IS NO VOLT METER AND NO WARNING LIGHTS ARE EVER ILLUMINATED.

I PURCHASED THIS VEHICLE SEPTEMBER 2015 FROM CARMAX IN CHARLOTTESVILLE, VA. SINCE THAT PURCHASE, I HAVE KEPT UP ALL THE ROUTINE MANTAINANCE ON A SCHEDULE FROM OIL CHANGES, ALL FLUIDS, TIRE ROTATIONS. APRIL 21, 2016, MY FIRST RATHER LARGE EXPENSE, "ENGINE CHECK'. I AM HEARING A NOISE IN THE FRONT END. WARRANTY PAID A PORTION OF THIS ISSUE AND I PAID THE BALANCE. THE SERVICE DEPARTMENT INSTALLED N STRUT, N NUT, INSULATORS AND BEARINGS. AND THE DRIVER SEAT TRIM CRACKED AND BROKE. (1ST TIME); NEXT ISSUE IS A TOTAL WARRANTY ISSUE THAT INCLUDED REPLACING THE TORQUE CONVERTER. I ADVISED THEM THE ENGINE WAS SKIPPING AND THE CAR WOULD SLOW DOWN. THEY INSTALLED A CONVERTER GASKETS, HOSE AND 12 QTS OF FLUID. 1/27/18. I ADVISED THEM AGAIN OF A LEAK FROM WHAT I THOUGHT WAS THE ENGINE.AT THAT TIME, THEY ADVISED IT WAS A VAPOR LEAK FROM THE EXHUST PIPE. ALSO..THE DRIVER SEAT OUTER PANEL BROKE AGAIN, THEY REPLACED.AND NOW, 4/28/18, THEY ARE TELLING ME THE DRIVE SHAFT HAS TO BE REPLACED AT A COST TO ME OF OVER $2500 +. NOW. YES, I AM CONCERNED. THIS SHOULD NOT BE HAPPENING TO A RELATIVELY NEWER VEHICLE..ONE WOULD NOT THINK. MY ENCLAVE HAS 104K MILES ON HER CURRENTLY. THIS VEHICLE WAS PURCHASED FOR MY WEEKEND VISITS WITH MY DAUGHER AND GRANDCHILDREN. TO REPLACE MY 2000 FORD EXPLORER. AND NOW, I AM FEELING SAFER IN MY FORD EXPLORER. I HAVE NEVER HAD TO HAVE ANY KIND OF WORK DONE ON THAT VEHICLE, EXCEPT FOR ROUTINE MAINTAINANCE. AND SHE IS STILL RUNNING AS GREAT AS EVER. WHAT CAN GM DO FOR ME AND MY 2012 BUICK ENCLAVE. I AM LOSING MY FAITH IN THIS VEHICLE. PLEASE HELP. THANK YOU FOR YOUR TIME. I HOPE I DON'T END UP HAVING TO PAY FOR THIS ISSUE.