general problems of the 2010 Chevrolet Express

The contact owns a 2010 Chevrolet Express. The contact stated that while driving at approximately 45 mph and attempting the go down a hill or a light slope, the vehicle revved and shook violently. The contact softly applied the brake pedal and slowed down to steady the vehicle. The vehicle was taken to a dealer where the vehicle was unable to be diagnosed. The manufacturer was made aware of the failure and stated the failure was an unknown issue. The contact stated that the manufacturer did not offer any assistance. The failure recurred several times and was not remedied. The failure mileage was approximately 5,000.