2013 Chevrolet Impala power train problems

“While driving vehicle warning light service stabilitrak....reduced engine power comes on. Vehicle then slows and can not drive over 20 to 30 mph. This has occurred randomly at highway speeds while driving on interstate in traffic. Sudden reduction caused traffic to have to slow quickly and almost caused a collision.”

“while waiting to make a left turn when traffic cleared I pressed the gas pedal and heard a loud grinding noise and the car would not move for 2 or 3 seconds and suddenly moved. Very dangerous. Car forums have many of the same incidents with great difficulty in resolving this problem and after several years no answers. This is life threatening issue.”

“The contact owns a 2013 Chevrolet Impala. The contact stated that her vehicle would fail to start up after multiple attempts without warning. The contact stated that while her fiance was driving at 55 MPH, the vehicle shut off without warning which cause him to crash into a ravine. The air bags did not deploy upon impact. The contact and her fiance suffered minor scrapes and bruises but did not seek medical attention. A police report was filed at the scene. The vehicle was towed to an independent tow yard where it was deemed a total loss. The dealer was contacted about the incident and was informed that they could not pick up the vehicle to perform an investigation. The manufacturer had yet to be notified of the failure. The vehicle was destroyed. The failure mileage was unknown”

“ABLE TO SHIFT GEAR POSITIONS BUT THE INDICATED SHIFT POSITION DOES NOT REPRESENT THE GEAR POSITION THE VEHICLE IS IN. WHEN I STOP AND PARK THE VEHICLE, I AM ABLE TO SHIFT THE LEVER TO THE "PARK" POSITION, BUT THE VEHICLE IS NOT ACTUALLY IN PARK POSITION. I CURRENTLY HAVE THE EMERGENCY BREAK ON. VEHICLE WILL NOT STAY IN PARK WHEN GEAR IS IN PARK POSITION. THE LIGHTEST TOUCH WILL KNOCK GEAR SHIFT INTO REVERSE AND CAR ROLLS AWAY.”

“I DONT UNDERSTAND WHY MY CAR SHOWS NO MISFIRES UNTIL TODAY AND ITS THE FUEL CONTROL MODULE BUT IT RESETS AND GOES AWAY THEN BACK AGAIN LIKE ITS REMOTE CONTROL. WHILE STATIONARY BATTERY IS FAIR/ ALTERNATOR FAIR”

“DOES NOT SHIFT INTO GEAR SMOOTHLY. I CAN FEEL A JERK WHEN TRANSMISSION CHANGES GEARS. THERE IS A DELAYED RESPONSE WHEN WHEN EXCELERATING FROM A STANDSTILL. THIS VEHICLE HAD 36000 MILES WHEN WE NOTICED THE PROBLEM 4 MONTHS AGO. PROBLEM CODE P0989 SHOWN WHEN RECENTLY CHECKED BY MECHANIC. ANOTHER PROBLEM IVOLVES AN INTERMITTENT METALLIC GRINDING NOISE WHEN MAKING A LEFT TURN AT LOW SPEEDS.”