general problems of the 2020 Buick Enclave

Vehicle suffered a catastrophic, uncommanded electronic and mechanical system failure within 30 days of purchase, resulting in a severe crash. Prior to the incident, the vehicle exhibited a violent, unexpected jerking motion while accelerating up a highway on-ramp, though control was briefly regained. A few days later at the end of may, while driving in the rain, the electronic systems completely failed with zero dashboard warning lights or error messages appearing. The vehicle completely overrode driver input, veering uncontrollably from lane to lane on its own. Simultaneously, a total loss of braking power occurred; pressing the brake pedal had no effect on reducing the vehicle's speed. To stop the runaway vehicle and prevent hitting other drivers, I was forced to intentionally steer the SUV into a physical wall. The impact deployed components, caused orange engine coolant to leak, and forced the electronic precision shifter into neutral on its own before the vehicle lost all electrical power. The steering wheel airbag deployed during this initial impact. Approximately 5 minutes later, while the vehicle was disabled on the road and after I had safely exited, a secondary vehicle struck my stationary car, which caused the majority of the remaining airbags to deploy. Detroit police responded to the scene and filed an official crash report noting that I 'lost control' and struck the wall, but the responding officer failed to document the mechanical/electronic brake and steering failure reported at the scene. This simultaneous loss of eboost braking control and electronic steering assist strongly aligns with the current federal safety investigation into gm vehicles (NHTSA case pe24011). The vehicle is currently parked and being preserved exactly as-is at my residence to serve as evidence, as the module memory holds the event data recorder (edr) data proving full brake application during the failure. I am requesting an immediate investigation into this VIN.

1st incident I was backing out of a parking spot and it went into emergency park I had to turn off the truck , turn it back on and take it out of emergency parking 2nd incident a week later I was at a stop light the truck did the automatic shut off. When you have your foot on a break , I'll let go of the break to go through the light and it went into emergency park again engine light is on auto zone says it one of 2 different catalytic converters unsure which one would have to get them both replaced over 500 each 3rd incident auto shutdown when stopped burnt out the starter no way to turn off the auto start stop 4th incident today pulling into the parking lot at the grocery store. Doing about 10 to 15 mph truck just shut off it putting it's into emergency park or shutting of while driving is a safety issue but no recalls single mother can't afford to even have it looked at right now.

We bought this 2020 Buick Enclave from pinegar Chevrolet in republic, mo from the preowned side of the dealership. When we test drove it only in the parking lot it didn't make any noises, but as soon as we drove off the lot after purchase the brakes made a noise as if the anti lock brake system was not working properly making it difficult to stop as the car should. We also was told that since this is a preowned and not a certified preowned that it was sold as is no warranty. I believe gm needs to fix this issue ASAP or the dealership needs to either buy the car back or put us into something with a warranty that doesn't have safety issues. We bought this as our family vehicle and I don't believe it is road worthy or safe to be transporting my family in.

Vehicle jerks at low speeds when accelerating. Brakes grind when applied at hard braking or regular braking.