Problems with 2007 Buick Rendezvous VEHICLE SPEED CONTROL

At 65 miles per hour on a highway in rich hour traffic my vehicle stalls out and displays 2 lights 1."reduced engine power" "service traction control system" or something to that effect. the car will not start for 3-5 minutes. then restarts and continues to do the same thing another 5-7 times before i was able to get to a safe location. when hooked up to a code reader the code that displayed was co240 abs powertrain control module.. this is extremely dangerous. *tr

Tl*the contact owns a 2007 buick rendezvous. while driving 10 mph, the instrument panel lights illuminated. when the contact depressed the accelerator pedal, the vehicle hesitated and then accelerated. she stated that the vehicle felt as if it would stall when the accelerator pedal was depressed. when she removes her foot from the brake pedal, she felt a sensation and the vehicle would accelerate very quickly. the dealer noticed that the instrument panel lights were illuminated and stated that the accelerator pedal sensor was the cause of the malfunction and needed to be replaced. the dealer replaced the vehicle and stated that if someone would inspect the vehicle, the failure would appear. approximately one month later, the failure recurred for the second time. the contact took the vehicle back to the same dealer with the failure still present. the dealer stated that they would keep the vehicle and notify the contact of the situation. he also stated that there were other failures with the vehicle, such as the engine hesitating upon start up, the radio malfunctioning, and the doors jamming. the dealer stated that nothing could be done about the engine until it malfunctioned. the radio was replaced and the doors were repaired; however, the doors continue to malfunction occasionally. the purchase date was unknown. the current mileage was 9,800 and failure mileage was 9,300.