I'm desperate to know if anyone else has experienced this. I've made 3 calls to GM and it has been in for service a total of 20 days since I bought it back in June (no codes, no check engine lights and the problem didn't happen to them while they had it...did the rough idle computer update just for kicks). When I'm driving, I'll start to feel a weird shudder. Once it gets to a certain point, it will lose speed and not let me accelerate. It will eventually shudder and die. Most of the time I manage to get it pulled over, but yesterday I got stuck in the middle of an intersection. My husband and daughter were following me and managed to get videos of a couple of sputters and stalls.
http://m.youtube.com/watch?v=AaxYg8e...I&feature=plpp (happens around the 1 minute mark).
http://www.youtube.com/watch?app=des...&v=vho305e14J4 (from inside the car, 20 second mark, the entire car shakes)
I love my car, but I don't feel safe driving it anymore. The first time it did this, I was doing 70 on the interstate and almost had an 18 wheeler plow into me...with my daughter in the backseat.