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  1. Duramax Fourth Generation: 2007.5-2010 (LMM)
    I have had issue with low rail pressure for some time. Recently, I had a airdog II 4G installed but hadn’t had the opportunity to tow the camper until this weekend. When I came to a hill, the light came back on and It went into limp mode. The code says “low rail pressure” and sometimes the DIC...
    low rail pressure
  2. Duramax Fifth Generation: 2011-2016 (LML)
    I broke the crank on my original engine and replaced it with a reman. Prior to the breakdown, all things worked at optimal condition. Now that we have the new engine in, I'm showing 260-305 psi in the fuel system. Turns well and strong but won't start. Not enough pressure. I've primed the system...
    duramax turbo diesel lml duramax low fuel pressure low rail pressure
  3. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    I have a 07 LBZ that is throwing a code for low fuel rail pressure. It only does it when ambient temp is over 90’F and I’m towing at highway speeds. I already replaced the fuel rail relief valve and the fuel filter and now I’m suspecting one or more injectors may be bad. I have noticed a...
    injectors lbz low rail pressure
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