NHTSA Complaint #11521369 — 2019 CHEVROLET BOLT EV

While driving on the freeway at 65 mph during morning rush-hour, the vehicle unexpectedly decelerated without warning and came to a stop. The vehicle was barely able to make it to the shoulder before losing all momentum. There is a high-risk of a fatal collision when a vehicle unexpectedly stops or drastically slows on a freeway with 65 - 70 mph traffic, which is compounded during peak travel times. This is a risk to not only the vehicle occupants, but other drivers and vehicles as well. Several error messages were displayed on the dashboard as the car was decelerating: Drivetrain malfunction: Stop and turn off engine; Service high voltage battery system; Service Vehicle Soon; Unable to shift. The battery range dropped from just under 50% (~115 mi) to 0 while attempting to pull over on the shoulder. After the vehicle was stopped, it was unable to be powered off for about an hour. It was not successful in shifting or moving and the battery range showed 0. An hour and a half (1.5 hours) after the incident, the vehicle would power on and show a battery range between 121 - 110, which would drop to 0 within 15 seconds with a message that it is unable to charge. At the time of the incident, OnStar sent an email stating that "A critical issue with the engine and transmission system in your 2019 Chevy Bolt has been detected. Please service your vehicle immediately." The battery had been replaced the week of February 5th, 2023 per several product safety recall notices . There was one issue on February 18th, 2023 that the battery range was not updating, but it corrected itself after being parked for 3 hours. There were no other previous issues or indications of a problem prior to vehicle malfunction. The vehicle is currently being diagnosed by a dealer. It is currently available for inspection. The electrical, propulsion, and powertrain (and possibly speed control) systems did not function properly.