Speed Control Springs problems of the 2002 Chevrolet S10

Throttle stuck in wide open position on ramp entering highway, brakes were not effective in stopping vehicle, speed increasing , turned ignition key off and coasted to stop, checked accellerator pedal, was stuck in wide open position, could not free it, checked for interference from carpeting and there was none, waited a while and the pedal realeasd on its own, drove it home under partial throttle, called the dealer, who sent a roll back truck topick it up, while waiting on the wrecker I depressed the pedal and it stuck to the floor, I then took a camera and took pictures of the pedal in stuck position to show the dealer in case he didnt believe me. The picture clearly shows that there was no interference from the carpet or mat, as the engine cooled down the pedal released again, which led me to believe that the problem was heat related and was located somewhere in the throttle body ass. ,dealer worked on vehicle and stated on the work order that the problem was caused by carpet protecter interference, took truck home and checked out the throttle body assembly, there was clear signs that work had been atempted in that area. Return spring had signs of tool contact, butterfly in throttle body bore showed signs of tool marks, I checked to make sure everything was free, which it was, my concern is that if it is a reacuring problem someone with less luck could possibly be killed and the manufacturer is not telling the truth on the real cause of the problem.