When stopped at a light or what ever the engine vibrates pretty bad. It's a fast vibration. It doesn't seam that there is a mechanical problem because if you put it in neutral the vibration is not nearly as bad. It has done it since the day we got it. I guess it's more of an annoyance than a real problem.
Could it be that the idle is too low? Or is it just the fact that it is a 4 banger? I had a '01 2.4 cav and it wasn't this bad, though there was a slight vibration at idle and in gear. I have a Colorado 3.5l I-5 auto and it doesn't vibrate like this.