The contact owns a 2023 Chevrolet Silverado 1500. The contact stated that while stopped at a traffic light on an incline, the brake pedal was depressed; however, the vehicle failed to operate as intended. The driver assist warning light illuminated. The vehicle independently accelerated and lunged forward, striking the preceding vehicle. The contact's vehicle pushed the preceding vehicle forward before coming to a stop. The vehicle was taken to the dealer, where the failure could not be duplicated. The failure mileage was approximately 44,000.