Re: Yukon knocking noise?
So I took my Yukon to the shop last night, they started it this morning and determined it was a stuck lifter. They said it would cost 2200 dollars just to fix it. I can't go that route. I think I'm going to try the ATF in my oil and change my oil this week because that always helps. My only concern is what problems could this pose in terms of hurting anything internally if I ignor the problem or is it just going to be an annoying noise. Also why did this happen in the first place.
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