The contact owns a 2013 Chevrolet Silverado 2500. While driving various speeds, the main operation system, calibration, speedometer, and start production were affected by cyberhacking. As a result, the contact stated that there was a complete loss of brake functionality and an erroneous speedometer reading on more than one occasion. Bentley Buick GMC (2120 drake avenue, huntsville, Alabama, (256) 415-6513) reset the vehicle with new calibrations and enhanced the engine oil life monitor to more accurately identify the required oil change interval, which produced diagnostic trouble code: 2T459. The failures recurred. The manufacturer was not made aware of the failures. The failure mileage was approximately 45,000. Updated 11/26/18

- Huntville, AL, USA

Driving at approx 35-40 mph approaching a hairpin turn tried to break and vehicle did not slow down slid through the corner into a rock, put the vehicle is reverse and pressed accelerator the vehicle RPM increased on own tried to break the RPM did not diminish(foot off accelerator) before I had time to shut the truck off I hit a tree behind me. It appears something stuck in accelerator (mechanical) or the computer system( electronics) failed. The vehicle has not yet been tested.

- Kalispell, MT, USA

The contact owns a 2013 Chevrolet Silverado. The contact stated that while driving at 70 mph with the cruise control activated, the vehicle independently accelerated and the brake pedal had to be depressed firmly to stop the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 2,000.

- Sanford, NC, USA

Vehicle unexpectedly accelerated at a gradual increase form 25 to 40 mph on its own Accord. Vehicle did decelerate once brakes were applied. Manufacture notified through the visit to the dealer, and.

- Roanoke, VA, USA

The contact owns a 2013 Chevrolet Silverado 1500. The contact stated that while driving approximately 50 mph, the vehicle unexpectedly accelerated. The vehicle failed to decelerate when the brake pedal was depressed. As a result, the contact crashed into a mail box and two utility poles. A police report was filed of the incident and the vehicle was towed to an independent mechanic for further investigation. The manufacturer was not notified of the defect. The approximate failure mileage was 10,100. The VIN was unavailable. Updated 10/08/14 the consumer checked there was a fire, but did not elaborate any further. Updated 10/21/14

- Willards, MD, USA

The contact owns a 2013 Chevrolet Silverado. The contact stated that while driving in first gear and taking the foot off the accelerator pedal to apply the brakes, the engine RPM's would not decrease and the throttle would not release for approximately 3-4 seconds. The failure caused abnormal forward movement from the vehicle. The contact also stated that while driving in first gear and shifting into neutral, the engine RPM's increased by approximately 200 ripens before decreasing. The vehicle was diagnosed at the dealer but the cause of the defect could not be determined. The contact stated that a representative from the manufacturer came to the home and drove the vehicle. The representative experienced the defect while driving the vehicle but did not identify the cause of the defect. The vehicle was not repaired. The failure mileage was 20. Updated 03/11/14 the consumer stated by the time his foot reached the brake pedal, the engine was holding a constant 1400 RPM, resulting in not only trying to slow the mass of the vehicle, but also attempting to brake against an engine locked at 1400 RPM. The consumer also stated that he removed his foot from the accelerator as a test and then popped the steering column gear shifter into neutral and the engine gained another 200 RPM for 3-4 seconds. Updated 03/13/14

- Chelsea, MI, USA

Transmission down shifts multiple gears when I decelerate. The first occurrence happened at 70 mph causing a very hard deceleration and near loss of control of the truck. I have had three other like incidences at speeds between 45 and 70 mph. These happened on dry pavement and I was able to slow safely. Had this occurred on wet or snow covered roads, I have no doubt there would have been an accident. 2. at times when I accelerate there is no throttle response for several seconds. When the engine does respond, the truck accelerates as if I have the throttle floored. Again this has happened on dry pavement. Slick conditions would have caused a spin out. 3. vehicle surges between 20 and 45 mph. Engine RPM continually jumps 200-300 RPM causing constant surging. Besides being very annoying, it would be dangerous on icy roads.

- Kennewick, WA, USA