The contact owns a 2023 Chevrolet Trailblazer. The contact stated that while driving at undisclosed speeds, the vehicle independently activated the brakes while the accelerator pedal was depressed. In addition, the contact stated that while attempting to make a left turn, the steering wheel independently veered towards the right. The check engine warning light was illuminated. The vehicle was towed to a local dealer where it was diagnosed, and the brake master cylinder assembly was replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the same local dealer and was left for further investigation. The manufacturer was not made aware of the failure. The failure mileage was approximately 25,000.