What makes my box van give off loud vibration ? When in gear an hold the brake? on 2002 GMC Savana 3500

Increasses when heat or air is on and lowers in park.

by in Houston, MO on March 30, 2013
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , March 30, 2013
be some thing run by belt. failing pully kit or failing component.