We own both a 2011 and a 2013 Chevy Impala. Both vehicles grind and hesitate. They both act this way while taking off from a light, backing out of the driveway and then putting it in drive and any other time it feels necessary to do so. Except while being checked by the mechanic. We owned a 2007 Impala that did the same thing. Our remedy, push the traction control button to the "off" position. Stopped making the noise and no longer hesitates after putting it in drive. Of course, we have to do this each and every time we get in the car. No more buying Chevy's for us.

- Centerville,, OH, USA

When the accelerator pedal is released, the car does not slow down. Dealer says car is ok. This happens at any speed and makes it difficult to slow down or stop. The car will run along at about 20 miles per hour from a stopped position without touching accelerator. Very difficult to drive on ice or snow.

- Kenmore, NY, USA

While driving on the highway the "service traction control" message comes on, then, the messages "service stability trak" then "engine power is reduced". and then the car shuts down I had to quickly pull over on the side of the road. After a few minutes the car starts up and everything is fine. This happened twice since then. Every couple months the sensor lights would come on with the above message-without car shutting down. The lights come on a lot more often now-although the car does not shut down, it's the fear of the possibility. When googling this problem with the car it sounds like this is a common problem. I'm not sure why there hasn't been a recall. I'm bringing in my car tomorrow to get fixed. However, its upsetting that there seems to be a problem with the throttle position sensor, and there was a recall on a GMC truck in 2008 for this problem. This seems to be a problem regardless of year of miles of the Impala.

- St Anthony Village, MN, USA

I was driving on a highway going approximately 55 mph, the engine light, stability control light, and reduced engine power light came on at the same time. Within two (2) minutes of the dash warning lights coming on, the car completely shut it self off while I was driving in the left lane going 55 mph. I lost steering, had no power, or braking. I threw the car in neutral, in an attempt to get it started it while I was in motion with no power. The Impala didn't even try to turn over. The car wasn't responding because the power steering / braking was not responding. The Impala went into "limp mode" without warning. I let the car cost for a while until I could find a safe spot to apply the emergency brake. I really had to muscle the steering wheel with some significant force to get it to turn. I have never had any problems with this vehicle before this issue. It turns out that the "pedalassembly" gas pedal sensor went bad, causing the 2011 Impala to go into "limp mode" while I was driving.

- Newark, NJ, USA

2/17/2015 was the second event. I was driving approx- 65 mph up a mountain when my electronic display panel showed stabilitrack/service traction control/vehicle in reduced power. As the power suddenly reduced I lost power steering control and brake function. Since I was traveling at a up hill grade, I was barely able to jerk the steering wheel enough to roll across the lane of traffic beside me to the side of the road. I wasn't able to get out of the road completely and was almost hit by a logging truck. After removing the keys from the ignition for a few minutes, I restarted the car without any hesitation. The engine light still remains on at this time. I did contact onstar and have them run a diagnostic test which revealed a problem with supposed fuel system. I have not taken it to a dealership yet. After so many complaints on various sites that I have reviewed, looks like GM would do a recall and investigate the problem before someone loses their life.

- Summerville, GA, USA

2/17/2015 was the second event. I was driving approx- 65 mph up a mountain when my electronic display panel showed stabilitrack/service traction control/vehicle in reduced power. As the power suddenly reduced I lost power steering control and brake function. Since I was traveling at a up hill grade, I was barely able to jerk the steering wheel enough to roll across the lane of traffic beside me to the side of the road. I wasn't able to get out of the road completely and was almost hit by a logging truck. After removing the keys from the ignition for a few minutes, I restarted the car without any hesitation. The engine light still remains on at this time. I did contact onstar and have them run a diagnostic test which revealed a problem with supposed fuel system. I have not taken it to a dealership yet. After so many complaints on various sites that I have reviewed, looks like GM would do a recall and investigate the problem before someone loses their life.

- Summerville, GA, USA

Reduced engine signal came on shortly after service traction, brakes, steering, came on then car shut off no power to anything. Brakes, steering nothing worked. Put car in neutral to try a restart nothing. Got car to a complete stop took the key out. The dash made a weird noise almost like something reset. I put keys back in turned the key car started no problem only thing the check engine light was on. Took vehicle home went back later that night. Started it up and check engine light was off. This happens almost once aweek. 2nd issue heater blower going down the road just shut off weather -2 plus a wind chill. Had it serviced they replaced a module blower ran fine for 4 days, weather advisory windchill temp is -10 45 miles away from home heater blower not working again.

- Standish, MI, USA

I turned my car on to let it warm up after work, then started driving home. Then some lights popped on. It said service stabilititrak. It said that it was reducing engine power. Service control soon. It was very scary driving home. The car would take off by itself and it felt like it was stalling out. Its a fairly newer car 2011, I shouldn't be having these issues.

- Southbridge, MA, USA

While driving along a curvy river road my check engine light, my traction control and the stabilize light came out. Then the engine reduced power. Barely made it home. Waited for a few minutes restated the car and it ran normal but still feel the car hesitate. Every time I drive it I worry that its coning to do it again. I live in the part of the county that gets snow and am worried its going to happen during a storm, this needs to be addressed.

- Pennellville, NY, USA

The contact owns a 2011 Chevrolet Impala. The contact stated that the check engine warning light illuminated. The vehicle was taken to a dealer for diagnostic testing. The mechanic advised that the throttle body needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 77,000.

- Jackson , MI, USA

As I was driving the engine light pop on and. Read stabilitytrak reduce. Engine speed service control soon.

- Milwaukee , WI, USA

The contact owns a 2011 Chevrolet Impala. The contact stated that while driving 40 mph, the vehicle stalled as the traction control and check engine warning lights illuminated. The contact mentioned that while attempting to inspect the vehicle, burning fumes emitted in and around the vehicle. The contact mentioned that the failure could have been directly related to NHTSA campaign number: 14V355000 (electrical system). The vehicle was taken to the dealer. The technician was unable to diagnose the failure. The manufacturer was not made aware of failure. The failure mileage was 34,239.

- Selma , AL, USA

The contact owns a 2011 Chevrolet Impala. While driving approximately 65 mph, the vehicle decelerated to 40 mph. The traction and engine power reducing warning indicators illuminated and the vehicle stalled. The vehicle had not been diagnosed or repaired. The manufacturer was not notified of the failure. The VIN was unavailable. The approximate failure mileage was 60,000.

- Ozark , AL, USA

The contact owns a 2011 Chevrolet Impala. While driving 70 mph, the traction control and reduce engine power warning indicators illuminated as the vehicle decelerated to 10 mph. The failure occurred on several occasions. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 77,000. Updated 12/30/14 updated 05/28/2015

- Livonia, MI, USA

Driving 2011 Chevy Impala in city traffic. Service stabilitrak, service traction control, reduced engine power warning messages received. This has happened several times at intermittent intervals in the two years I have owned the vehicle. In some instances, the engine shuts off and all power steering and power braking is lost making it very difficult to control the vehicle. After research, this is a problem that GM needs to address. I have found that if I pull over when the warning messages display, shut the car off, wait approx 10 min, the car will start again, the messages will be gone, and the car will drive normally. The check engine light remains on and then goes off within a day or two.

- Glendale, AZ, USA

The contact owned a 2011 Chevrolet Impala. While driving approximately 45 mph, the engine stalled. The contact lost control of the vehicle and crashed into an embankment. The driver side frontal air bag failed to deploy. The contact suffered injuries to the head, arm, and chest. Medical attention was received. The manufacturer was not notified. The vehicle was destroyed. A police report was filed. The contact received a recall notice for NHTSA campaign number: 14V355000 (electrical system) after the crash occurred. The failure mileage was 113,000.

- Williston , SC, USA

The contact owns a 2011 Chevrolet Impala. The contact stated that the vehicle stalled without warning. The vehicle was taken to a dealer where the technician was unable to find a failure. The manufacturer was made aware of the failure. The failure mileage was 98,286.

- Baytown, TX, USA

The contact owns a 2011 Chevrolet Impala. The contact received a recall notification for NHTSA campaign number: 14V355000 (electrical system); however, the parts needed for the repair had not yet been manufactured. Both the dealer and manufacturer were made aware of the failure. The contact had not experienced the failure specified in the recall; however, the vehicle had intermittent issues with the turn signal indicators and the engine hot/ ac off indicator would illuminate intermittently. The vehicle was not repaired. The failure mileage was 50,000.

- Wolcott, NY, USA

My family and I were traveling from newark, NJ from the July 4th holiday back home to raleigh nc on 95 South in Virginia and going at a speed of 72mph approx. And the car/engine just turned off at that rate of speed with 2 children in the back seat of the vehicle. After we sat on the side of the road for about 45min the vehicle proceeded to start and we made it home to nc. The following business day after the holiday I took it to my mechanic giao auto located on capital blvd in raleigh nc and he could not determine why the vehicle shut off the way it did. So I continued to drive just with precaution. I received a letter on 8/21/2014 regarding the recall and was livid because this has happened to my family while driving on the interstate! I believe that this may happen to my family again and do not want to risk this, so I would like to know what can be done to ensure that my children have a safe vehicle.

- Raleigh, NC, USA

The contact owns a 2011 Chevrolet Impala. While driving 50 mph, the vehicle stalled without warning. The vehicle was able to restart after several attempts. The failure occurred on several occasions. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 85,000.

- Holmstead, FL, USA