Question about 2001 GMC Yukon

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My problem is that when the car is started there is a humming sound. about 5 min. later it stops. today, the car started making the noise and did not stop for about 8 miles or so. what could this be?

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Open the hood and listen closely it can be the belts ,too loose or worn ,your bearings gone bad on the idler ,or tensioner

Posted on Mar 30, 2011

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Oil starved check oil level w/ engine off .. also w/ running check oil pressure on gage or oil lite Last time changed oil? 5 to 7 k.. I change mine use a good synthetic..also could be a lifter not pumping up..

Posted on Mar 30, 2011

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Posted on Jan 02, 2017

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