2001 Pontiac Montana • 6 cylinder FWD Automatic • 126,500 miles

2001 Pontiac Montana - Lots of vibration when stopped at light with elevated revs. Less vibration when move to neutral.
N. G. Wells
December 17, 2010.

It sounds like it might need the throttle plates cleaned or a real dirty air filter or a bad i.A.C-(idle air control) valve. If this were bad your cheak eng light should come on.