whining noise on 2007 GMC Sierra 2500HD
I always enjoy coming on here and getting advice on minor bumps I come across along the way.. My current issue is on cold days only, I have a "whine" when first driving my truck until it warms up aft...
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Possible to be an alternator bearing starting to go, had the cold startup noise on a 2001 and turned out to be just that. If you have a stethascope or use a piece of dowel to put against it and listen you will hear it loud over other engine surfaces as comparison.
