It is a transmission control module wear a lobster transmission into a Garin. Will not let you speed up or speed down and it is unsafe and GM IS making us pay for the bill. The contact stated transmission control module all across the country on back order, you cannot get a dealer to get you one within six months GM should have to do something about this.

- Fredonia, NY, USA

2011 duramax diesel Silverado 2500. When changing lanes in lake Tahoe in heavy traffic engine suddenly went full throttle. I stood on brakes with both feet as the truck was burning rubber and nearly rear ended a handicapped van. I shut the engine off and the transmission slammed to a lower gear. Once I let traffic clear and re-started the computer reset and the throttle was fine. I managed to hook up my rv and head home but was careful not to accelerate very hard hoping it would not happen again. Truck is now in a local diesel repair shop being evaluated. Engine was revving close to 5,000 RPM. Thought for sure we were about to get in a serious accident or hit some people as there was very heavy vehicle and pedestrian traffic.

- Lebec, CA, USA

Throtle position sensor is always on even after replaced transmission is shifting, poorly, needs reprogramming gears are shifting roght malfuntion of transmission soleinoids, bad manufacture,

- Laurel, MD, USA

On 09/22/2014 at approximately 1610hrs I was traveling South on I-95 in the state of Maine. I attempted to exit the highway near sidney, me. I tapped on the brake to cancel the cruise control. As I braked my vehicle attempted to speed up. When I applied the brake my vehicle down shifted and attempted to maintain its speed. This situation nearly caused me to have an accident and took aggressive braking to stop the vehicle. On 09/23/2014 I attempted to have this situation documented at frank galos chevorlet in saco, me. They refused to document the problem. I called General Motors at 1-800-222-1020 and had the problem documented. Complaint # [xxx]. this incident could have been a near death or serious injury accident. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Houlton, ME, USA

Driving about 60 mph about 10 miles into the trip when the truck lost speed, the ABS brakes did a slight on and off pulsating every couple of seconds, the engine was running rough and giving it gas the engine revved up but wouldn't go anywhere. Speed dropped down to 35 or 40 mph and wouldn't go any faster. The dash indicator showed messages stating stabilitrak traction control turned off and check engine light is on. It jolted real hard when it shifts gears. When I mashed the brake it didn't want to come to a complete stop without pressing the brakes to hold the truck there. I pulled into a store popped the hood and finding nothing I turned the truck off for a few seconds and restarted it but nothing changed and the error messages were still being displayed. The trucks engine was running rough. I headed home and it didn't have any power and jolted hard as it shifted gears. I coudln't go but 35 or 40 mph on the level ground. If I went up a slight hill the truck slowed down more until I got past the hill. I gave it gas and the engine would rev up but had no power and wouldn't go 35 or 40 mph. I parked the truck in the garage and in 10 minutes I went to start it to get the error messages and it started up fine and the engine wasn't running rough. I drove it 1/2 mile down the road and back and it ran perfect. I googled the error messages and found alot of complaints and comments about this issue on the Chevrolet forum website. No recall information just alot of people experiencing the same issue and alot worse cases that almost caused accidents. Is there a recall on this issue? I read that I will probably have the issue again because after it sits for 10 min it probably won't have a problem until a few minutes or days later. I can only hope doesn't cause me to have a wreck and kill myself or someone else. This is a major issue and should be recalled to fix the problem.

- Denton, TX, USA

2011 Chevrolet Silverado. Consumer writes in regards to the vehicle throttle position sensor recall notice. The letter advised consumers not to take their vehicle to dealer, unless they experienced the problem. The consumer was concerned he may experience reduced engine power, while driving at night.

- Livonia, MI, USA

Traveling at 60 miles per hour, accelerated and the accelerator stuck going up to 80 miles per hour in a 60 mph zone. I stomped on the accelerator to no avail. I had to put the truck into neutral to avoid a crash. Pulled over and finally kept stomping the accelerator until it released.

- Smyrna, GA, USA

The contact owns a 2011 Chevrolet Silverado. The contact stated that the vehicle failed to respond to acceleration attempts. After continually depressing the accelerator pedal, the vehicle suddenly jerked forward. Additionally, the contact noticed the vehicle hesitated when accelerating. The vehicle was taken to the dealer for diagnostic testing. The technician was unable to diagnose the failure. The vehicle was not repaired. The approximate failure mileage was 22,000.

- Vancleave, MS, USA

#1. vehicle accelerates when letting off gas, even while going uphill the vehicle will accelerate. You can go up a steep hill without touching the gas. Brought the vehicle to the dealership they replaced, the throttle body, gas pedal assembly. They reinstalled the original parts and told us that this was normal. We drove other 2011 Chevy Silverado's which did not do the same thing. The dealership told us that all the 2011 Chevy Silverado's accelerate on their own. #2. there is a clunking noise from the rear when driving over bumps. The dealership said this is normal backlash, and did not do anything.

- South Grafton, MA, USA