2001 Pontiac Montana "auto severe vibration front end" Questions

severe unless it becomes necessary to brake really hard in which case it causes the steering wheel to vibrate. It has been to a tire/brake servicenter and a dealer , who both say the brakes are normal

...front drivers side. When I put it in gear and start to release the clutch it makes this aweful noise. If I depresss the clutch the sound will go away..No problem going into gear...No loss of ...