Chevy and GMC Duramax Diesel Forum - View Single Post - High pitch whining noise with videos
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post #8 of (permalink) Old 07-05-2019, 06:05 PM
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Join Date: Dec 2017
Location: Central Arizona
Posts: 201
I had a idler pulley bearing go bad and it squeeled like crazy but was higher pitched than that. Can't hear anything underhood??

2004.5 Silverado CCSB LLY
Sinister EGR delete,
S&B air box and up-sized S&B intake mouthpiece,
CAT converter delete,
ATP 5 stage tune - Edge CST w/ EGT and backup camera,
5" AFE Power full exhaust kit
Airlift 5000# bags w/ on-board remote compressor

Just a nice CLEAN stock truck for towing the toys to the playground with a back seat full of grandkids
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