If you look under the truck, there should be the steel down pipe (filler tube) and a breather that attaches to the side of it. Check to see if that has come apart.
PLEASE NOTE: This is an emissions system component that is covered 100% by the manufacturer for a minimum of 5 years or 50K miles. You are completely under warranty and the vehicle should be returned to a dealer for proper (and free) repairs.
Let me know if they give you a hard time.
Joe
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Wednesday, December 29th, 2010 AT 12:54 AM