I just bought a new 07 6.7 about 13 days ago. I have 3000 miles already and tiday as I was driving the check engine light came on. Truck was running fine so I stopped in the first dealership I came to and the pulled the code and said it was the EGR circuit. nobody can work on it until next week and i was just wondering if anyone else has had this issue. Even more wierd the overhead went from reading in the 15's to reading in the 17's with the check engine light on.