I think it is important to share this with other Duramax owners with truck years 2011-2016. You may or may not be aware of an issue with the duramax that a injector pump failure causes a total failure of the truck, and has a repair bill in excess of $13,000. My situation is that my truck is a very important part of my lifestyle, as we fulltime RV, and travel to some remote places. I say all this because Mike was the only tech that even mentioned that the replacement of the injector pump is necessary to ensure reliability. Having known this issue Mike was the only shop owner that I talked to that knew this and recommended this replacement. Thanks Mike for the great job and the sound advice.