2007 Chevrolet Suburban engine problems

2007 suburban vehicle came to a stop 25ft behind several stopped cars at a red light. Without provocation, the vehicle strongly accelerated/surged forward while the brakes were engaged. Driver continued to attempt to stop the vehicle by repeatedly hitting the brake pedal, but with no success. Passenger in vehicle reported seeing drivers foot on the brake. Vehicle accelerated forward into the back of another vehicle which was then pushed into a third. All three vehicles suffered damage.

Active fuel management (afm) lifters jam/seize causing push rods to remain collapsed and causing engine misfires throughout the engine and excessive oil burning, possible damage to catalytic converters, and premature engine wear. Lifters must be replaced or engine replaced. I was driving the car and when the engine began misfiring, check engine light began blinking, traction control became disabled, and error on dash saying service stabilitrak and traction control disabled appeared.