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  1. Duramax Second Generation: 2004.5-2005 (LLY)
    Having a hard time with this…. Injector 6 (3rd back on driver side) was at first slow leak.. pulled it out, there was no o-ring on it, put a new one on and it’s still leaking but now it worst… pulled it back out and took it to a shop here local and got a new copper seal and another new o-ring...
  2. 6.5L Diesel Engine
    Hey y'all, I tried to ask this question before, but I failed to illustrate exactly where I was leaking from. This time 'round I got some "better" pictures, and also a illustration straight from the manual. What I need is to identify where the leak is coming from (probably transfer case)...
  3. Duramax Fifth Generation: 2011-2016 (LML)
    2012 LML - Any ideas on what this leak could be? Fluid is brownish in color to the eye. Wiped it clean with a napkin and it’s yellow when wiped off. It’s completely odorless and oily to the touch. Hasn’t dripped too bad overnight but definitely enough to notice on some cardboard, have found...
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