Thread: Yukon knocking noise?
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Old 04-11-2009, 08:30 PM   #5
gmclowsierra
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Join Date: Mar 2008
Location: williamsport,pa
Posts: 329
Re: Yukon knocking noise?
im going to say its the piston slap. my 2000 yukon with the 5.3 does the same thing. no fix at this time according to gm
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