I noticed today it's really bad, so i did a google search on '6.7 burned diesel smell' just for the heck of it...and saw someone had the same issue, it turned out to be a EGR cooler gasket that went south...guess im making the call to the dealer next week to have it checked out.

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2009 Ram 2500,QC, 6.7L, Auto-6, 4X4, Laramie
2006 Hummer H3, 3.5L, Adventure PKG
1986 GMC Sierra Classic, 5.7L