I have a 2000 OBS Tahoe Z71 and love it. I got it about a year ago and it only had 89k miles on it. Everything seems to be running great on it, but when I have it in drive and stop a light, the console and front seats vibrate. It isn't the worst shaking ever, but it is enough to visibly shake a coffee cup in the console cupholder. It doesn't really do so when it is park or neutral. I am not a diy mechanic by any stretch of the imagination, so any suggestions or thoughts would be appreciated.