Parked a running vehicle, 2023 Buick Envision with 52000 miles and when I went to start the car again, it would not run; cranked OK but would not start, just "stumbled" for a few seconds and then nothing. Tried several times thereafter to start to no avail. Called for a tow and learned that due to a not running vehicle that has electronic transmission, could not put it in neutral to allow a simple tow; tow driver had to put dolly on both front wheels and rear to tow to GM dealer. Original decision by service rep was that the fault was due to a bad fuel pump module. I called GM for any recall on this model and device only to hear that it was not a problem for them to present a recall. I am not the first customer that has had this problem according to your website and number of complaints with the same make, year, and model of Buick.

While driving in traffic, after changing lanes, the vehicle experienced a complete electrical shutdown without warning. The engine shut off, the dashboard went completely black, and hazard lights were not functional. There were no warning lights, messages, or audible alerts prior to the failure. The vehicle was in active traffic and, stopped without power steering or brake assist. After opening the hood, multiple wiring harnesses and a loose battery cable were visually observed. When wiring was physically moved, electrical power was immediately restored. Upon restart, the vehicle hesitated to start and then displayed messages instructing the driver to open and close the driver and passenger windows, indicating a full system reset due to power loss. We were able to return home safely. Parked the car, and obtained a rental. The vehicle had been serviced by the Buick dealership where the car was purchased, three days earlier. Two days after the incident, I was able to speak to someone at the dealership, who stated they may have bumped something. The vehicle was towed to the dealership, and assessed. The dealership later documented a loose battery cable and promised to replace a fatigued clip, but denied responsibility for the incident. I contacted the manufacturer, and was referred back to the dealership.The vehicle has only been inspected by the dealership. This incident created a serious safety risk, to our lives, as well as our fellow drivers' lives, as the vehicle lost all electrical power, including required safety lighting, while in traffic, without warning. The vehicle is available for inspection, upon request.

The transmission on the vehicle failed. It is available for inspection. The vehicle began jolting, when accelerating from a stop, or when slowing to a stop. Seemed to be slipping out of gear while driving. We reported the incident to the dealership. They said they found nothing wrong. The issue continued, and the check engine light came on, so we returned to the dealer again. This time they found it needed the transmission to be rebuilt. They have had the car at the service center for 5 months. The parts they need are no longer available.