1998 GMC Yukon grumbling noise

1998 GMC YUKON
117,000 MILES • V8 • 2WD • AUTOMATIC
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1998 GMC Yukon mileage: 117,000. I have a problem with my Yukon, it sounds like the transmission is going out. My friend said had had the same problem and it was a bad alternator. Could this be? Do alternators make this grumbling noise when going out?

Jan 7, 2011 at 11:51 PM
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Yes, we just had a GMC truck come in for that same problem. The easiest way to see if it is your alternator is to remove the drive belt them start it for a moment, did the noise go away? if yes, replace alternator.
Jan 7, 2011 at 11:54 PM