07 Yukon whining noise

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d0f0

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I have a 2007 GMC Yukon that is making a whining noise… replaced the alternator, water pump, etc.. nothing solved the issue. Took off the serpentine belt and noise persist, the noise also grows louder when rpms are increased, any and all pointers would help.
 

Big Mama

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It’s a whine not a belt squeal? Is the noise from the top or bottom, front or back? It may be a vacuum leak. With no belt, which I wouldn’t recommend, the tensioner shouldn’t be involved but check them out.
 

ny_summit

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If you left the AC belt on it can be the ac compressor, mine is making a whining noise. Specially when it's cold it. I took a mechanic stethoscope and found it it's the ac compressor. Most likely the bearing on the clutch
 
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d0f0

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If you left the AC belt on it can be the ac compressor, mine is making a whining noise. Specially when it's cold it. I took a mechanic stethoscope and found it it's the ac compressor. Most likely the bearing on the clutch
i’ll take a look at it tomorrow, thanks for the pointer!
 
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d0f0

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It’s a whine not a belt squeal? Is the noise from the top or bottom, front or back? It may be a vacuum leak. With no belt, which I wouldn’t recommend, the tensioner shouldn’t be involved but check them out.
seems to mainly be in the front and closer to the left side more than anything, will look into removing the ac compressor belt tomorrow.
 

Joseph Garcia

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Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.
 
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