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Discussion Starter · #1 ·
I have a 2008 Silverado 3500 with the duramax. This week, I started hearing a noise coming from the engine compartment when under ex celebration and a little at idle that sounds like excessive air blowing. I had the hood raised today and had my brother in law rev it up a little and found the noise to be coming from the back of the motor around the turbo area. It also blows black smoke from the same area when you do this. Any suggestions on what this might be. Thanks in advance for any help.

Kirk
 
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