Cruise Control problems of the 2000 GMC Sierra 1500

The contact owns a 2000 GMC Sierra 1500. On January 20, 2008, while driving 65 mph with the cruise control activated, the contact attempted to decelerate, but the vehicle failed to respond. The vehicle accelerated to 80 mph and the contact called the highway patrol for assistance. They informed him to apply the brakes, but that did not work. They then informed him to pull off on the next exit. The contact exited the highway, pulled into a parking lot, and circled around until the vehicle decelerated to 35 mph. He was then able to shut off the vehicle. He waited several minutes before restarting the vehicle and drove around the parking lot until he felt confident that the failure would not recur. He has not yet notified a dealer or mechanic about the failure. The failure mileage was 57,000 and current mileage is 60,131. Updated 04/29/08.