Chevrolet Impala sudden acceleration problems

Filed Feb 9, 2022 · Fuel system · VA

On Fb 08 2022, at app 5:30 in the evening my 2016 Impala had a non-driver directed surge of speed. As I was slowing down to enter a driveway, the vehicle surged forward powerfully. I was able to press the brakes forcefully engaging the antilock mechanism. The vehicle shook as I continued to apply breaking force. It came to stop barely missing another vehicle parked in the driveway. I have no explanation for this dangerous episode. I had not used any type of automatic speed control. The car is serviced by authorized dealership: Hampton Chevrolet in Hampton VA. I was in the car with two of my grandaughters when the incident occurred. I was able to drive the car back without any problem, but I'm scared to drive it.

Filed Apr 4, 2021 · Transmission · 30,000 miles · NV

After about 30000 miles the transmission solenoid(s) are going bad intermittently. It's going to be a costly repair for a part that costs around 25 dollars or so. This seems to have been a continuing problem on the 4t65e transmissions. When you are at a complete stop with the vehicle in drive and go to accelerate you get no response except for higher RPM's and then the transmission suddenly engages and you get a violent surge forward with a loud bang. Gm knows about the problem and should initiate a recall to install new and improved solenoids.

Filed Sep 20, 2019 · 79,000 miles · IN · crash

I have been having problems off an on with several issues I don't know if it's sensor , wiring, wheel, or other related but I have been having issues with service stabil trak, service airbags, traction control, braking related, etc. Most recent has been with service stabil trak . I took to dealership and they said computer showed throttle body needed replaced and I've done that then a couple weeks later same lights coming on only this time dealership says it's the right wheel speed sensor harness but I didn't have that repaired because I am seeing in forums online others having same issues and it's an ongoing problem no matter what part of the system you fix so I've been turning off traction control so I don't get warning lights . Vehicle always in motion with these problems and after all the issues I've had and still have I know now that an accident that happened about a year ago is definitely related to all this . I was approaching a busy intersection and saw light was yellow so I started slowing down and came to a complete stop I remember having my foot on brake pedal and next thing I knew my car had slammed into the rear of the car in front of me it happened so fast I was stunned and couldn't comprehend what had just happened and the person I hit was a pregnant female who was very upset. I told her I had no idea how the incident could've happened with my foot on brake we were both on our way to work and since there was no real physical damage to our vehicles we just exchanged info and headed to work. I know now it was related to this somehow and wished I would've reported it. The car had accelerated on its own!! I bought this car from the dealership with 41,000 miles (highway miles ) I was told it now has 92,000 miles on it and I have done all the oil changes and required maintenance but have spent several thousand hours at dealership with every issue imaginable.

Filed Jun 8, 2019 · Acceleration · 46,000 miles · UT

Re: car randomly lunges forward while slowing to a stop. This does not occur every time I come to a stop. It is an unexpected event that happens from time to time while slowing for a stop sign, stop light or just to stop period that this car seems to lunge forward like I'm accelerating which I do then the gears adjust down but only when applying more pressure on breaking. There have been a few times since I have had this car where I almost ran into the back of the car in front of me due to this.

Filed Mar 6, 2019 · Driver assistance, Engine · 94,000 miles · FL

Tl* the contact owns a 2013 chevrolet impala. While driving approximately 60 MPH, the "service stabilitrack" message displayed on the message center. The vehicle lost acceleration, the rpms increased, and the vehicle surged forward. The contact stated that the failure occurred for approximately eight months. The vehicle was not taken to the dealer for diagnostic testing. The manufacturer was notified of the failure. The vehicle was not repaired. The approximate failure mileage was 94,000.

Filed Jan 9, 2019 · Engine · 29,000 miles · FL · 1 injury

Tl* the contact owns a 2015 chevrolet impala. While the contact was parallel parking with one foot on the brake pedal, he opened the driver's door and placed the other foot on the outside pavement. The vehicle suddenly surged forward and pulled the contact out of the vehicle. The contact's foot became pinned by the rear wheel of the vehicle. It took the contact half an hour to wiggle out from under the vehicle. The contact quickly shut off the vehicle. The contact was bruised and scratched and later received medical attention. A police report was not filed. The dealer (nimnicht chevrolet, 1550 cassat avenue, jacksonville, fl 32210, (904) 677-8823) diagnosed that the purge solenoid was stuck open and caused the vehicle to lurch forward. The vehicle was repaired. A week later, while driving, the engine revved and the contact had to depress the brake pedal with both feet. The contact shifted the vehicle into neutral and the engine immediately decreased from 3,000 rpms. The contact called the manufacturer and was provided a claim number. The manufacturer sent a claims representative to visit the contact, take pictures, and record the failure. The contact was waiting for a representative from the manufacturer to call him back. The failure mileage was 29,000. *tt

Filed Nov 8, 2018 · Acceleration, Brakes · 51,564 miles · IL · crash · 1 injury

Tl* the contact owned a 2012 chevrolet impala. While reversing out of a parking lot, the vehicle accelerated without warning. The contact depressed the brake pedal, but the vehicle failed to stop. As a result, the vehicle finally stopped when it crashed into an embankment. The passenger was taken to sherman elgin hospital to receive medical attention for back, neck, and shoulder injuries. A police report was filed. The vehicle was destroyed and towed by the police to an unknown lot. The dealer and manufacturer were not notified. The vehicle was not diagnosed. The failure mileage was 51,564.

Filed Aug 20, 2018 · Engine · 35,312 miles · CA

Tl* the contact owns a 2017 chevorlet impala. The contact stated that exhaust smoke seeped into the vehicle through the air vents. The vehicle also accelerated on its own and extreme pressure had to be applied to the brake pedal to stop the vehicle. In addition, coolant was leaking from the engine. There were no warning indicators illuminated. The vehicle was taken to rotolo chevrolet (16666 s highland ave, fontana, ca 92336, (909) 333-6924), but no assistance was provided. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failures. The failure mileage was 35,312.

Filed Feb 14, 2018 · Acceleration · 39,500 miles · WI

On 10/10/2017 my 2015 impala 2ltz had sudden acceleration, full throttle. No brakes, no emergency brake, the only way I could stop the car was to put it into neutral ( over 90 MPH by then). Then again on 1/25/2018 the same thing happened again, sudden acceleration, by then I knew I had to put it in neutral to stop. My wife and I were lucky I could maneuver the car around several other vehicles and avoided an accident. Both times I was on the freeway at freeway speeds with the adaptive cruise control engaged.

Filed Nov 20, 2017 · Acceleration · 39,000 miles · WI

I was driving on the freeway with the adaptive cruise control on at about 50 to 55 MPH when suddenly the car went full acceleration. I tried to stop the car by turning off the cruise control, turn off the ignition, use the emergency brake, none worked. I then put the transmission and then everything worked, by then I was doing 90 plus miles per hour passing vehicles. I contacted gm and they tried find a problem but did not a problem.they said no codes appeared. This sudden acceleration lasted only a few seconds before I put the car in neutral. Will a code appear if the problem lasted only a few seconds. Gm closed the case.