My 2011 had the adjustable pedals, 2016 doesn't. I didn't notice anything loose, but will dig into it with a flashlight to see if there is anything hampering it. Mats were pulled out of the way so that is ruled out.
fuel filter is at 95% - so good there.
I did some googling per g2gby and what I have found there is dirty MAP or bad EGR.
Without codes, I am thinking my chevy dealer is going to blow me off again. I mentioned it to them on my first oil change.
Thanks for everyones responses.
2016 3500 HD LT - with Leather
SOLD - 2011 2500 HD