Engine seems to lag under quick acceleration. Problem occurs most often when accelerating from a turn or when changing lanes under acceleration. Speeds of occurrence mostly approximately 20-25 mph. Requested checks and service at a dealership only to be given a service bulletin from GM stating this was a normal part of the traction management system. My previous vehicle (2014 Silverado) was also listed on the bulletin, but the problem was never noticed on this vehicle. I see this issue as an increased risk of a collision with the highest risk being a rear end collision. This needs to be addressed and fixed.

- Albuquerque, NM, USA

Driving at about 60 miles a hour and lost all power engine was running but going no were all light were lite on dash like you turn key on before starting thank god no one was coming the other way or the car behind me would have hit me. He was a good driver. Shut it off and restarted it then it would run with all light on dash even brake light and anti skid light and it said on infro. Running at reduced speed. Drove to my home a slow speed it let me. Shut it down let it sit a few min. Restarted it still the same. Shut it down for about ten mim. Restarted it. Seem to run ok but check engine light is till on now I afraid the will just reset it and say it is ok. And next time I won't be so lucky. It has 5500 miles on it. I did see my life before my eyes hopping it dose not happen to others. Taking dealer tomorrow it happen at about 5pm 3/24/2016

- Harrisburg, PA, USA