I have a 2000 S10 2.2l 5spd. I got a new Ac put in and when I first got it didn't shake when the ac was on. Atleast a week later it started to shake when the Ac is on. It does it really bad when I first start it, cold start. Then after driving it and the engine temp is at working condition it stops, just a little bit though. So i was wondering of there is a mechanical issue or an electrical issue maybe? I've read up on it a little and some say it could be the spark plugs or alternator. Any suggestions would help much. Thank you all.