I HAVE A 2012 CHEVY SONIC LT AUTOMATIC WITH THE 1.8 LITER. THE CAR STARTED HAVING PROBLEMS AROUND 45,000 MILES AND HAS GOTTEN WORSE OVER TIME.THE CAR ON COLD START UPS HAS A GRINDING SOUND. THIS GRINDING MOST OF THE TIME ONLY HAPPENS ON COLD START UPS BUT DOES AT TIMES HAPPENS ON WARM START UPS. THIS SOUNDS LIKE METAL AGAINST METAL AND IT RATTLES. THIS SEEMS TO HAPPEN UNTIL THE CAR IS FULLY STARTED AND RUNNING. I AM GETTING CONCERNED BECAUSE IT IS GETTING WORSE AND LOUDER. *TR
2013
SERVICE BRAKES
TL* THE CONTACT OWNS A 2013 CHEVROLET SONIC. THE CONTACT STATED THAT WHILE DRIVING 40 MPH, THE BRAKE PEDAL ABNORMALLY TRAVELED TO THE FLOORBOARD WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE TECHNICIAN DIAGNOSED THAT THE MASTER BRAKE CYLINDER WAS DEFECTIVE AND NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 327.