Question about GMC Yukon XL
The whine is probably a bad bearing in the alternator or a idler pulley you can take off belt and crank up for a few seconds to see if noise goes away.if it does then it is in one of the pulleys i have seen a lot of these alternators make noise. your oil pressure will go up some when you rev up
Posted on Aug 25, 2008
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Posted on Jan 02, 2017
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