Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by chazawazzle, Jan 13, 2009.
hey guys, could the pcv valve make my suburban run rough if it has a bad hose or is broken?
Yes, it will create a vacuum leak.
i tried to fix it but that wasnt it.
could it be the paper gasket on the air cleaner extention?
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