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  1. Duramax Fifth Generation: 2011-2016 (LML)
    I have my 2013 at the dealership waiting to have a new DEF heater installed under the extended DEF system warranty. I appears it may also need a NOx sensor that is not warrantied. While talking to the service manager I aked him how many of these trucks make it to 150,000 miles without DEF...
  2. Duramax Fifth Generation: 2011-2016 (LML)
    Recently i made some emissions repairs on my 2016 lml. The 9th injector stuck open and roasted the cat. I replaced the 9th injector, cat and upstream egt sensor. I finished putting the truck together tuesday night, drove it home, drove yesterday and this morning. Today it throws the good ol def...
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