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I don't think it's normal

Oh really? So it really may not be an exhaust leak? So if they know that it is these valves, do they not want to replace these valves? Why the hell wouldn't they? They know it's abnormal and they get paid by gm warranty why wouldn't they replace it? Sorry for all the ? marks lol.

Yeah has to be header exhaust leak. I'm going to have to go back up there and lean on them some more til I get something.

So I have a 15 Yukon I got in Aug 14. Shortly after I got it I noticed a clicking noise when its idling heard from the outside. Its loud enough that people comment on it and say things like "should it be making that noise?" and "that motor sounds funny." I have taken it to the dealer and...