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Forum: Chevrolet & GMC Truck General Forum 12-20-2012, 09:51 PM
Replies: 4
Views: 13,181
Posted By Crocmania
I thought it was the turbo but its a very loud...

I thought it was the turbo but its a very loud hiss it stops for about ten seconds every now and then at idle. It almost sounds like an exhaust brake is stuck on
Forum: Chevrolet & GMC Truck General Forum 12-20-2012, 01:36 AM
Replies: 4
Views: 13,181
Posted By Crocmania
Hissing noise proflo exhaust

Is there anyway of stopping the hissing sound on a duramax at idle so it just has the nice v8 burble
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