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Zane posted a topic in The NewsroomZane Merva Executive Editor / Publisher, GM-Trucks.com February 13th, 2019 GM only announced the all new 2020 L5P Duramax and 2020 Silverado/Sierra HD models a few weeks ago and we're already finding out more about them. This time Gale Banks has his hands on not one, but TWO L5P Duramax engines and takes one of them apart to explain what's different from the 2019 L5P engine. The video is over 13 minutes long but worth every second. Enjoy!