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Hi, there. It’s definitely not the auto start. I turn my auto stop off as soon as I start my truck. I never use it. I still haven’t figured out why it occasionally does this.

Thank you for your reply. I’m unsure of the temperament of these inlines, so I am unfamiliar with what may or may not be “normal” sounds, feels, etc. I do notice it more, when it happens, in park as well.

Thank you for your response. I’ll keep an eye on it for now. The last place I want to go into limp mode is in rural Montana, that’s for sure. I do think the issue is the worst during a cold start. My truck is garage kept so the dealership made it seem that I was getting the cabin smell due to...

Hi all, I’m new to the forum and also to the 3.0 Duramax. I traded my 18 canyon duramax in last December for a 2021 1500 elevation. I love the truck and I am trying to learn what is normal for this specific engine. My truck was purchased new and currently has 3800 miles on it. I’ve noticed...

Hi, any update to your situation?

I feel like I am also having this issue. I got my truck in December 2021, and noticed it the night I brought it home. Over the past couple of months, I feel like my cab smells of exhaust. I also notice my exhaust (while outside the truck) has a very strong smell. I took it in to be looked at and...