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Discussions surrounding the Duramax Diesel engine. Duramax LB7 (2001-2004 Chevrolet Silverado HD and GMC Sierra HD) ... Duramax LLY (2004.5-2005) ... Duramax LBZ (2006-2007) ... Duramax LMM (2008-2010) ... Duramax LML (2011-2016) ... Duramax LGH (2011-2016 Chevrolet Express and GMC Savana) ... Duramax L5P (2017-)


  1. What's new in this club
  2. Scheduled Jan 4th, 2021 to have Calibrated Power (duramaxTuner.com) replace the injectors.
  3. A common issue with the GM 6.6L Duramax engine is white smoke at idle. Worn and damaged injectors are often the cause however there are other causes and considerations that should be looked at prior to injector replacement. INJECTORS STUCK OPEN OR WITH EXCESSIVELY LEAKING NOZZLES DIANOSIS 1. Remove IGN 1 relay. 2. Remove the glow plug from the suspect cylinder(s). 3. Crank the engine and check for fuel spray coming out of the glow plug hole. Caution: Make sure you are not in front of the glow plug hole during this process. 4. Replace any injectors on the cylinders that spray fuel.
  4. Changed the glow plugs in my LBZ Duramax Diesel and learned a few things. First, why did I jump into this project? Whenever it was cold out (which is often here in Michigan) the glow plug would come on and when it went away the Check Engine light would stay on. So I pulled out my spade tuner and read the code which was ECM P0672. Review what the code is its defined basically everywhere as a semi generic code but with some specifics like what cylinder to troubleshoot So which one is the #2 Not that it really matters since when you are changing them its always recommended

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