Chevy and GMC Duramax Diesel Forum - View Single Post - High pitch whining noise with videos
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post #10 of (permalink) Old 07-06-2019, 09:57 AM
Ron Nielson
DuramaxForum Veteran
Join Date: Aug 2009
Location: Berryton, KS
Posts: 1,358
Too bad the noise isn't made all the time. You could pull your serpentine belt, go for a (short) drive, and see if there was any change. To me, it sounds like power steering pump.

Ron Nielson
2008 Silverado LT, CCLB, Edge Insight CTS
2009 Arctic Fox 29-5T, Silver Fox Edition, Onan 3600 LPG generator
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