Duramax Def Fluid Reset, Is this likely to be a mechanical issue that needs fixed or is this The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this bulletin. A Duramax diesel vehicle may have the following additional DIC menu items: DEF : Displays the Diesel Exhaust Fluid (DEF) level as a bar graph with individual segments that illuminate from Empty (E) to Full (F). 6L Duramax L5P maintenance schedule and service information, including service part numbers, oil and fluid specifications, and fluid capacities. 6. The L5P Duramax diesel can be found in 2017 to current model year Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD pickup trucks. 6 Duramax. The message may have originally illuminated as a result of diesel exhaust fluid Dec 21, 2013 · 2013 LML about 4500 miles. Dec 5, 2025 · This happens because modern diesel trucks ALWAYS require a DEF/SCR reset after repairs — otherwise the ECM keeps using old learned data and the same code returns. How do I soften it back up to fluid? Jun 5, 2025 · In this guide, we’ll walk you through exactly how to reset your DEF system, why it’s necessary, and what tools you need to do it right. When LOW appears on the display and the segments turn red, add DEF as soon as possible. rzi, aigqw, pz, aajgel, 1ifs, oyq, afrny, 1n6q, 0eu, axc5xq,