I recently took delivery of a 2017 GMC 2500HD Denali with the Duramax. As soon as I hit 300 miles, the CEL came on as well. Judging from the readings in this post, this might not be a fun ride... Fortunately I was just around the corner from the dealer and was able to drop it off immediately. The first tech plugged in a code reader. He didn't give me the code, but said that the sensors are showing as not reading. They admitted the truck into the service cue. I will provide updates on my experience. jj46 - Can you please hint a tad more as to where that other post that you at referencing is located? Sounds like I'd better get more educated on this. p.s. I have not even driven enough to add fuel, nor any other fluids such as DEF, to my vehicle.
p.s.s. jj46 I believe that I found the lengthy post that you were referring to. Since I am not sure if it is kosher to redirect on this forum, I will refrain from linking.
