Originally Posted by shane90dsm

Thank you guys for all the posts. I might have to just take it to the dealer. When the truck runs it seams to run ok, no loss in power ect. but turn it off.... anyways. I think there may be a new leak somewhere. Im going to look up how hard it is to replace the STC fitting. one thing to keep in mind is although it is an 06 it might be an 05 engine. It takes time to build the box on the back. And not sure about year splits ect. but again thanks guys.