The contact owns a 2001 Buick Park Avenue. While the cruise control was set at 70 mph he attempted to disengage it, the vehicle accelerated over 70 mph. The contact stated that he also experienced failure with the vehicles head lights, high beams and the fuel gauge gave an incorrect reading. When the vehicle was out of fuel the gauge displayed full and when there was no fuel it also displayed full. The vehicle will be taken to the dealer for diagnostic testing. The manufacturer will be contacted. The failure mileage was 86743 and the current mileage was 88,651. Updated 3/7/11 updated 04/29/11

- Reynoldsburg, OH, USA

The contact owns a 2001 Buick Park Avenue. While driving approximately 55 mph with the cruise control engaged, the vehicle accelerated without warning to 80 mph and above. There were no warning lights illuminated when this occurred. The dealer has not diagnosed the failure. The failure has occurred intermittently for two months. The vehicle's speed also increased without warning when the cruise control was not engaged. The contact experienced some resistance when attempting to disengage the cruise control. The failure mileage was approximately 55,000 and current mileage was 57,365.

- Narbon, PA, USA

During a trip from New Mexico to Arkansas, I was driving with the cruise control on. Suddenly the cruise control caused the vehicle to zoom. This has now happened a total of 8 times. One time I was in a place to see how far it would go. From a speed of 65, the transmission suddenly downshifted and the car accelerated to 90 miles per hour. It disconnected when I hit the brake. On two other occasions, while driving on this trip, after disconnecting the cruise control by applying the brake, the cruise control suddenly reconnected with out any input from me. I feel that these type uncommanded inputs are dangerous and ask for an investigation to see if this is a common problem with GM vehicles.

- Little Rock, AR, USA

On a recent trip to Delaware, on several occasions when attempting to set or resume speed, the speed increased rapidly until the cruise control was manually disabled. My vehicle is a 2001 Buick Park Avenue. GM service bulletins 120901 and 030604056 describe the problem but do not classify it as a safety defect. I believe the incidents would have been serious had we not reacted quickly.

- Williamsville, NY, USA

Vehicle would make weird noises; first time when making right turn, was grinding and then stopping. This caused driver to jerk forward. Then, a thumping noise before suddenly accelerating. Had happened every few yards. Towed to dealership, mechanic found nothing after test driving. Second was in parking lot and backing out when vehicle suddenly accelerated and hit a pole. Had shifted into drive, and it accelerated forward and hit a building. Air bags did not deploy. Wheels were spinning like crazy.

- Parrish, NY, USA