I have a completely stock 2013 lml. It threw a generic code last month that said “most likely cause #1 NoX sensor”. I took it the Chevy dealer for a more in depth diagnostic. They came back with a bad injector. The NoX sensor. And 3 glow plugs. My question is this. Could the injector be causing the NoX sensor too be setting a case. If the sensor is bad. Should it have gone into limp mode. It hasn’t. The injector is covered under warranty but nothing else. The glow plugs are easy to change. The NoX sensor is too. But I think there is some reprogramming or something that only Chevy techs can do. Any info would be appropriated