2003 GMC Envoy Vehicle speed control Problems

“The dash cluster does not work correctly, all the lights turn on and doors lock while I am driving on in town or on the highway , all the gauges come on at once while driving on the streets at random times.. The rear has airbags in the suspension and and aren't working properly, I took it to the shop and they said it had 30 codes on the diagnostic machine but they couldn't find the problem”

“I was stopped at a light when the car accelerated on its own, I pressed the brake but the car would not stop . I hit car the car in front of me, I had to put car in neutral to stop the car. Car was towed to dealer, the cause was a internally shorted throttle body. The throttle body was replaced. This was the third time car accelerated on own and would not stop. The first two times my mechanic could not find any problem.”

“Dt: the contact stated while driving, the reduce power engine and oil pressure low, check engine ights illuminated. The vehicle stopped, although, the enginewas still running. The dealership was unable to diagnose a problem, but replaced the tank gasket, gas pedal, and computer chip. This caused the contact to rear end another vehicle.”

“Some times when the brakes are applied the throttle also advances causing unwanted acceleration. Happens at low speeds. Have there been any factory recalls for this problem?”

“While stopped the engine ran at 900 RPM's. After the brake was released the RPM's climbed to 1100 and the vehicle accelerated suddenly. The dealer replaced the fuel emissions canister once, and reset the electrical codes, and replaced the fuel tank, but the problem recurred.”