It's most likely your belt. They get old, "glazed" and refuse to grip the pulleys like they should. Best way to check is to remove the belt, start the truck for a few seconds to see if the noise is still there. Don't let it run too long though, as that belt drives all the accessories including the water pump and fan. You don't want to overheat. I hope this helps.
Thursday, July 12th, 2007 AT 8:36 PM