Speed Control Cable problems of the 2001 Chevrolet Malibu

I was traveling at 60 and took my foot off gas to decelerate and car wouldn't go less than 50. Engine rpm's wouldn't go below 2500. I could still stop car with brakes but this appears to be a constant problem and not intermittent like the person reported a few days ago. I checked the throttle linkage because I thought the non functioning cruise control could be affecting engine speed but neither cable kept the flap from bottoming out.

While waiting at a traffic light to make a left turn, the engine revved up to its maximum speed. Luckily my husband was driving and was able to make it around the corner and off the road. The only way besides the brake to slow the engine was turning it off. When he checked he found the accelerator cable had come out of the clip on the top of the engine. (there are two wires side by side. The front one--accelerator--was the one that came out) since he pushed it back in place it has been fine, but it can be a very dangerous thing to happen. He has taped the wire in place just in case.

My husband got in our 2001 Malibu backed it up, put it into drive, barely touched the accelerator, the car immediately took off in high throttle he could not figure out what was causing the acceleration next thing he knew the car was underneath his Chevrolet 4-wheel drive with a 6 inch lift kit. Car then pushed truck approximately 3 to 6 feet into a nearby oak tree causing car to be totaled truck to receive extreme damage as well. He called the police & reported the accident. I contacted gm they sent an investigator out to investigate the problem with the cars accelerator. The investigator hooked a computer up to the car that was supposed to record the last 5 seconds before impact, took some pictures, started the car to listen to the motor (he stated the car was stuck in high acceleration) moved some things under the hood (the gas cable) a loud clicking noise was made then the car was once again started & was fine. Three days later I received a call from gm advising me that the results found were that they were not responsible. I in turn asked for a copy of all information that was used in determining this decision including a copy of the pictures that were taken as well. I was told that the pictures were the property of gm & some information was as well but I could be sent a small portion of the information used in this determination process. A week later I received a letter from gm which read thank you for allowing us the opportunity to review the product allegation involving my Malibu, but our investigation revealed no evidence to support the product allegation. Therefore, gm is unable to assume responsibility for damages & they suggested that I resolve this matter through my insurance company. I later investigated this on the internet to find that gm has also been having some defects with this computer that records the 5 seconds before impact & that they have also had several complaints of this sudden acceleration which happened in our case.