Vehicle was shaking when accelerating, the issue is coming from a faulty transmission shudder on all 8 speed automatic transmission sold by General Motors. My safety was at risk due to very bad shaking that almost felt like the car was going to break down at highway speeds. The issue has been covered and fixed under my vehicle warranty, but may re appear according to sources online. There were no warnings to let me know that there was an issue with the part.

- Odenton, MD, USA

What component or system failed or malfunctioned, and is it available for inspection upon request" - the car itself stopped as I was driving up a hill. The car would not accelerate and while in Drive, the car began to roll backwards. How was your safety or the safety of others put at risk? - as I the car stopped accelerating, I was at a red light with other cars present. I have to put my car in park and have my emergency brakes. Luckily the car did not ram into me and luckily I did not ram into the other car due to the car rolling backwards. Has the problem been reproduced or confirmed by a dealer or independent service center? - yes the transmission needs replace. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others" - it has been inspected by my local dealership (not at the dealership that the car was previously bought from) Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? -

- North Kingstown, RI, USA