Your truck appears to be subjected to lotttttttts of short trips.
Totally random thought, but the inside of your bed looks incredible, especially for a 2014.
iI wouldn't spend too much time dwelling on it. Before all this smog stuff you had lines dumping it straight to the ground. They were called blow by lines. You never had to look at it so you didn't worry about it unless it started blowing oil all over your undercarriage
There are several very good videos on YouTube showing the entire 67.5 maintenance. Pulling and cleaning the cooler and EGR and replacing the CCV. I was surprised how easy it is.
When doing this service, I seem to remember someone suggesting to inspect and/or clean the EGR valve?
Can someone elaborate or show pics. Never done this service. So I'm a little inexperienced with some of this emissions tecirc stuff.