The contact owns a 2022 GMC Acadia. The contact stated that while depressing the brake pedal to stop, smoke began to fill the cabin of the vehicle. The transmission was switched to the park position and the contact exited the vehicle and discovered flames and smoke coming from the front brake rotors. Moments later a clicking noise was heard and the unoccupied vehicle rolled down an incline and crashed into a tree and came to a stop. A police report was taken at the scene. The vehicle was towed to the local dealer. The cause of the failure was not determined. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 15,000.