2014 Chevy misfire issues

[Marshgoat]

My truck is indeed an early 14. Build date is 8/13. I am certain my high pressure fuel pump on the engine or the ecm is my problem. As i said, my fuel pump clatters way louder than any other i have heard. I am suspicious that the early 14s have a known problem and in typical GM fashion they find it cheaper to lose a few customers tather than fix the problem. Good luck with yours. I gave up fighting with them.