2009 GMC Yukon Whistling noise

2009 GMC YUKON
70,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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KENDALJR
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  • 1 POST
I recently started hearing a whistling noise coming from the front of my car when I am traveling at higher speed. The noise changes pitch when I accelerate. I figured out that it only makes the noise when I am in automatic or 4 wheel drive. When I set it to 2WD I do not hear the sound. I took it to a shop and all they said was that I need a new transfer case. They didn't offer any troubleshooting ideas which I didn't really believe. Does anyone have any ideas of what this noise could be?
Jun 14, 2015 at 5:21 PM
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HMAC300
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  • 48,601 POSTS
it could be what they said or it may be a vacuum leak check hoses for cracks, disconnected etc. noises are very hard for us to distinguish.
Jun 15, 2015 at 6:53 AM