2002 GMC Savana 3500 Q&A
2002 GMC Savana 3500 Question: What would make my truck vibrate when put in gear an lower when taken out?
possible issue with belt or timing chain. vehicle run in idle, all components at rest. turn air on, added stress to belt. possible worn out pully kit on one of components powered by belt. bring to a shop and have them inspected. get diagnostic run to see any other issues you should be aware of. - arturo08