Let me educate YOU here, I've had several NEW trucks, Always ,and I repeat ALWAYS I do at least 500 miles before towing heavy. My point was WHERE in my 2014 manual does it reference this 500 mile thing, it does not . There was a gentlemen on RV Net that stated in a post that there was no break-in required having the same manual as mine , and so I went looking ,and he was correct.
I will repeat for you ,and others there is nothing in a 2014 manual that states a 500 mile break-in . I didn't read my manual when I bought the truck as far as the break-in, I do what I always do vary my speed , and no heavy towing for at least 500 miles.
Ron,
I don't know if you're referring to my post on RV.net or not, but I posted that the Cummins 6.7L does not require a break-in period. I went on to say that the axle needs a 500 mile break-in before towing.
Rusty