Fuel Delivery problems of the 1999 Cadillac Deville

Pulling into a parking stall three-fourths in, just coasting foot not on brake or accelerator, my car suddenly accelerated and hit the concrete wall at the end of the parking space. This was unintended sudden acceleration. Car towed to anderson Cadillac, unsafe to drive. They checked codes and found nothing. Car sent to body shop. $3000 damage to front end.