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  1. S

    LM2 Valve Clatter

    I took my diesel in again and they did diagnostics. Everything running as normal and they said the clatter is a normal thing for all the 3.0L Duramax diesels. I told them it's lazy engineering and would like Chevy to rectify. This is louder than any diesel I've had and driven.
  2. S

    LM2 Valve Clatter

    Has anyone took your Duramax 3.0l truck in for the new tech bulletin just posted? They say idol rattle is because of the intake system is loose. I took mine in but didn't fix the clatter in the engine. It just fixed the idol rattle.
  3. S

    LM2 Valve Clatter

    Added Max-Tane diesel additive. Seems to help reduce clatter but not fully.
  4. S

    LM2 Valve Clatter

    Same here. Something is not right. Sounds like a 250,000 mile diesel rather than new. I've owned diesels in the past and this is a problem GM needs to fix.
  5. S

    LM2 Valve Clatter

    Replaced my coolant valve because of defect from manufacturer and now valve clatter. Took to dealership and they said probably fuel related. Top Tier is what Chevy recommends for diesel standard but no fuel stations have it. Also, additive is not available for purchase from parts stores. I...
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