Chevy/GMC Duramax 06-07 LBZ Discussion of Chevy and GMC Trucks with LBZ Duramax Turbo Diesel Engines

Knock noise

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Old May 31, 2017 | 03:08 PM
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Default Knock noise

Need some help. I've got a knock noise at around 1200. To 1400 rpm. It goes away above and below that range. The video is a bit shaky but towards the end the noise is very pronounced. Weather is around 68f that day and low humidity. I have heard this when it was winter weather only warmer like now. In NW Indiana
 

Last edited by billu; May 31, 2017 at 03:22 PM.
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Old May 31, 2017 | 03:16 PM
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ATTN

 
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Old May 31, 2017 | 05:36 PM
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Today same weather. Same tank of fuel. Noise went away. Any ideas?
 
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Old Jun 17, 2017 | 08:35 AM
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would need a scan tool to monitor and make sure the injectors are ok and hope that is your problem.
 
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