Vibration on Hummer

[Joachim]

Hi all,

I'm new to this forum so bear with me if this question has been asked before. I recently bought a H3 about 3-4 weeks ago. I have travelled about 2700kms thus far. Couple of days ago, after started up the car and still idling, the car started to vibrate for a second and then stop for a few seconds and then vibrate again and continue on. It has been like that for the last couple of days and I'm starting to get worried.

The last time I had a similar occurrence, I was driving a Mitsubishi Lancer and the transmission had to be replaced. But that wasn't a brand new car.

Please advise if any of you have had a similar issue or may know what could be a problem.

Thanks.

Joachim