NHTSA Complaint #11302596 — 2016 CHEVROLET VOLT

THIS IS AN UPDATE TO MY ORIGINAL COMPLAINT #:11299056 FOR UN-COMMANDED ACCELERATION ON 1/13/2020. THE CHEVY DEALERSHIP WORKED WITH GM CORPORATE ENGINEERS AND WERE UNABLE TO DUPLICATE THE PROBLEM AFTER SEVERAL DAYS. THE RETURNED THE CAR AND BLAMED IT ON THE FLOOR MAT. THIS IS NOT LIKELY SINCE THE MAT IS A OEM HEAVY RUBBER MAT AND THE ACCELERATOR PEDAL DOES NOT REST ON THE FLOOR BOARD. SINCE THE CAR WAS RETURNED AND DRIVING FOR WEEKS, I NOTICED THE BATTERY RANGE WILL NOT CHARGE MORE THAN 49 MILES OF ELECTRICAL CHARGE WHEN IT OFTEN CHARGED UP INTO THE 50-60 MILE RANGE PRIOR TO THE INCIDENT. I'VE BEEN DRIVING THE CAR IN SLOWER HEAVY TRAFFIC LATELY AND THIS DRIVING STYLE OFTEN INCREASES ELECTRIC MILEAGE RANGE AFTER A FULL NIGHTS CHARGE. IT WILL NOT DO SO ANYMORE EVEN THOUGH THE ECONOMY MANAGEMENT SCREEN INDICATE MAXIMUM RANGE ECONOMY OF OVER 250 MPG. I'M A RETIRED GAS TURBINE MECHANIC AND I KNOW A PROBLEM WHEN I EXPERIENCE ONE. I SUSPECT THAT A BATTERY CELL MAY HAVE HAD AN UNCONTROLLED DISCHARGE AND IS NO LONGER ABLE TO ACCEPT A RECHARGE. I HAVE RELAYED THIS INFORMATION TO THE DEALER. NO RESPONSE YET.