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...
these trucks can have problems with the turbo vanes sticking. It can be remedied with labor/cleaning but most shops won't do this type work. Typical shop will want to r&r the turbo as an assembly.