2001 Cadillac Deville Acceleration problems

Car keeps stalling out (at light, while driving, etc) with the cause apparently attributed to a faulty ignition switch. I had the ignition switch replaced (for a charge of $496) at midway cadillac in pokomoke md (after having car towed there on feb 14, 2014, because at that time, had difficulty even getting the key in the ignition switch). The problem I was having with it stalling out persists, even after the new ignition switch. Writing because the ignition-switch-related problems I am having appear to be the...

Tl* the contact owns a 2001 cadillac deville. The contact stated that while driving 60 mph, the vehicle accelerated independently. He removed his foot from the accelerator and the vehicle continued to accelerate. The contact had to shift to neutral and pump the brakes in order for the vehicle to stop. He then shut off the vehicle and once restarted, the vehicle was reset. The vehicle was taken to the dealer but the dealer advised that there was nothing wrong with the vehicle. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 42,900 and the current mileage was 43,200. The vin was not available.

Tl*the contact owns a 2001 cadillac deville dts. The contact stated that while driving 60 mph, the accelerator pedal suddenly stuck. The vehicle accelerated up to 65 mph; the contact pumped the brake dpedal, shifted into neutral and back into drive. The vehicle began to slow down. The manufacturer had not been notified. The failure mileage was approximately 128,000.

Dt*: the contact stated while traveling 55 mph, the vehicle began to accelerate and would not stop. The contact continued to attempt to apply brake pressure. The transmission was put in neutral then into park and the vehicle stopped. The vehicle was towed to the dealership who determined that idle air control module was sticking in the high position. Also, the force in which the vehicle was put into park caused the motor mounts to fracture. The idle air control module and motor mounts were replaced. *Ak

Dt: while driving consumer puts foot on the brakes, and then puts foot back on the gas, and the vehicle dies. There is no indication that there any problems before hand. Then the service engine light comes on, and stays on for 2 or 3 days. The consumer has not taken the vehicle in to the dealership for service yet, waiting on gm to recommend.*Ak *sb

While accelerating at low speed throttle stuck. Consumer was able to control the vehicle. Dealership was notified, but did not resolve the problem. *Ak vehicle would not go below 2200 rpm. The vehicle was put in neutral and the consumer tried racing the engine, but it still would not go below 2200 rpm. After shutting engine down, went back to normal operation and the problem has not recurred. *Bf *nm