Vehicle has had a driveline vibration since purchased new. Dealer replaced the tires 3 times and then decided it was not the tires. After failing to correct the problem, dealer states that GM says there is not a problem and that the vibration is normal and within specs. I know this vibration should not be there and I am not the only person to complain to GM. They ( GM ) have taken back either by buying back or " trade assist " many of these vehicles, which, by the way, are within spec.. there is also no know build date for more of these vehicles. I have been offered the "trade assist" for my vehicle which would be acceptable were it not for the $0.20 a mile they want to charge me for milage already on the vehicle, but also for all the miles while waiting for them to provide me with another vehicle. I may be in the wrong place to complain about this but I don't have any guidence in persuing a resolution to this problem. H E L P !!

- Brandywine, MD, USA

While driving vehicle approximately 65mph vehicle would start to shake violently. If driving at lower speed, shaking would not be noticeable. Have taken vehicle to dealer to check & have not release it as of yet.

- Orangeburg, SC, USA

Rough idle and vehicle shakes and vibrates at highway speeds---steering wheel shakes violently when going over a bump in road.

- Lagrange, KY, USA

This is concerning and very aggravating as it has (2) times caused me to slow down to 50 very quickly by hitting the brakes to stop the vibrations and steering wheel shake. Thought I would loose control. It actually makes you have an upset stomach with the constant vibrations.

- Rockwall, TX, USA