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2003 gmc envoy_slt_xl
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48 Posts
Only when moving? If in park and idle up rpms. It sounds like a power steering pump going out. If moving and coming from one side. I'd say it's a wheel hub .


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2005 chevy trailblazer_lt
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37 Posts
Sorry found my account on tapatalk.

Yes it occurs when starting off and slowing down. Up to speed I can't hear it at all.

Now the "whirring" is different than the old whine noise subject our forum is full of. Very high pitched and not as loud as the whine.

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2003 gmc envoy_slt_xl
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48 Posts
Look and see if your backing plate is not bent some. And touching the rotor.


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