general problems of the 2003 Chevrolet Astro

I own a 2003, Chevrolet Astro. On Sunday, June, 28, 2009, I was driving on I-94, between alexandria, mn and fergus falls, mn. I had my cruise control set at 70 mph, the posted speed limit, when I approached a vehicle that was traveling at a slower speed. I pulled over to the left lane and proceeded to pass. As I was passing, I looked in my rear view mirror and noticed a vehicle was coming up to me at a fast pace, so I stepped on the accelerator, to get by the vehicle, that I was passing, a little quicker. When I passed the vehicle, I let up on the accelerator, to get back to the speed I was previously traveling. Instead of my vehicle slowing back down, it continued to go faster, I touched my brake pedal, to release the cruise control, but my vehicle continued to pick up speed, 80mph and climbing. I then stepped on my brake, on and off, to get back to about 60mph, moved my switch,for the cruise control, to the off position. I continued to pick up speed. There just happened to be an exit, to a town, so I went up the exit, stepping on and off the brake pedal to slow down. When I got to the top of the exit, I turned off the ignition and with the help of braking, I coasted to a stop. At this point, both my wife and I were very scared. I thought my cruise control had stuck, so I turned on the ignition and the engine roared, so I shut it off. I tried it once more and the same thing happened. Then I knew it was more than the cruise control, so I called my roadside service. After about a two hour wait,they brought my van to a Chevrolet dealer in alexandria, mn. It wa determined, by a mechanic, the next day, that my accelerator cable was frayed and that caused it to stick. The accelerator cable was replaced. I have the frayed cable.