At least 3 or 4 times, the car has remotely started itself while the key fob is in my pocket. Two times, the car was in my closed attached garage. To remote start the car, I would have to press and release the lock button on the fob, then hold down another button for four seconds. At times while I am working around the house or garage, I hear the car beep, indicating that my movements pressed the lock button. On the times mentioned above, evidently my movements pressed the two buttons, causing the car to start. I mentioned this to the service department of our Buick dealer, Dave Cross Motors in Lee's Summit, MO. They were not too concerned, and said that the engine would shut off after 10 minutes. I feel this could be a health concern. If the car did not turn off after 10 minutes, carbon monoxide could build up in our attached garage, and injure or kill us. Also, if someone broke into the car while running like this, could they steal it without the key fob being present. I have never had problem with my 2011 Ford F150 that has it's key fob on the same key ring.

- Blue Springs, MO, USA

My car shifts itself into what seems to be a 'neutral' state and then revs up very loud. It also slams on its own brakes, thankfully each time has been at low speed. Today was the last straw. I am never getting in to that car again! as I was leaving a parking lot, my car slammed on its brakes, all kinds of rolling sounds under my feet. Then it stopped and hit hard to start going again. Lights on my dashboard going crazy... the guy who was backing up as I was going by, honked and yelled at me because he didn't know why I would stop like that. I should have been well past him, but my car decided we were stopping. So a little shaken and upset, but I carried on. This car has been doing that since 4000 miles. It is very stressful to get in that car as it is. I sat at the very next red light at the parking lot I had just left to turn left onto a majorly busy street. The light was red, when it turned green, I applied the gas after a and it surged so hard, it was as if I floored it all the way, but the pedal had not moved under my feet, but I could feel all kinds of 'action' happening under my feet. As the car went over the crosswalk paint, it screeched the tires and I almost hit the guy who was also making a left next to me as my car was thrusting forward with great speed and spinning tires, when the wheels caught the pavement I almost hit the guy next to me in his back door. I was honked at and scared. I waived my hands to try to say ' I don't know!' I didn't know what to do. The man followed me almost a mile to my work and when I got out of my car he called me every name you can think of. This car is really scaring me and I cannot drive it anymore. I am going to try to work with GMC to take it back. I shouldn't have to be terrified to go to the grocery store. This car has done similar things over the last two years but it has only gotten worse. Dealer "can't duplicate"

- Bermuda Dunes, CA, USA

I drove over some metal covering of a pot hole or other type of hole on lexington avenue and about 100th street in nyc today. When I drove over the metal covering the car stopped. This is the avenir model which has auto stop. Thankfully, the car behind me stopped and didn't hit me. I will take the car in to be examined but I think it's a malfunction or issue with the auto stop. When I called the dealer, they said it was not the car's fault. I wanted to report it in case there are other complaints concerning similar issues. The dealer claims that they haven't seen this issue.

- New York, NY, USA

I was stopped at an intersection at a traffic light & when the light turned green, I turned left & I'm uncertain if my emergency brakes kicked on or if my car simply stalled out, but my car suddenly would not move. My purse, in the passenger seat flew forward & hit the floor of the vehicle. The car behind me at the light nearly rear ended me, but fortunately did not. We brought the vehicle to jim ellis Buick to be serviced, but they said it appeared fine & was confused. I definitely was not in any danger of hitting anything when turning at the intersection. This incident has made me uneasy when operating my car.

- Peachtree Corners, GA, USA

Premium package comes with safety alerts. However three of the alerts do not provide any of the safety function described. Front collision alert - have had three emergency braking situations and in all three where the red beeping alert in the dash did not function. Tested by GM engineer and he could not make it work at over 20 mph. Icons in instrumention light up so it is seeing cars but no warning at stated. Front pedestrian alert - similar to above, car is seeing pedestrian because icons light up green and amber but flashing red and beeping do not occur when you get in danger zone lane departure warning - there is not beeping when you cross a lane without using turn signal. Land adjustment works so vehicle is seeing lines but if you cross the line without any manual effort the alert does not work a GM engineer for the houston area drove the car and could not get any of these functions to work. He called GM and was told not to test this the front collision in the field but that it was tested at factory and worked as designed. So GM says there is not issue even though I have had 4 situations where it should have worked and the GM engineer could not get any of them to work as other GM cars. Other Enclaves on the lot all have the same issue, so it is either a design flaw or a programming issue, in any event it is a safety feature that is not working as described or as in other GM cars I own. They are not willing to discuss it anymore because even though it does not work in the field for him or me, their engineer said it is working as designed.

- Houston, TX, USA