My oil pump went on my 2014 with a 4.3.GM installed new engine and when I got it back it had a code saying injector issue.Sent it in for them to look at and when they told me it was gonna be on me I told them forget it.Brought it home ran 2 bottles of sea foam through 2 full tanks of fuel and havent had the code or any issues yet.That was 20,000 klms ago.