I have a 2013 Duramax with 130k miles. We’re in the middle of a 6k mile trip pulling 15.5klb 5er and I’ve started to get a turbocharger engine code (P2599). This first happened 3000 miles ago when...
I had a friend with a loose clamp on one of the hoses and was losing boost. He described somewhat similar issues. I asked him to pop the hood and all it took was a couple turns and it tightened it enough to get him 350 miles to home.