Christmas came early and I scored an 80k 2015 Silverado. Been sitting for a few months and had a check engine light on as apart of the deal but drives just fine.

Logging with hptuners it shows #5 misfiring seldomly from time to time. I have not driven the truck much maybe a full tank and the engine light went away on its own and came back with a list of DTC's ranging from an electrical anomaly with bcm communication(Radio works but constantly reboots???) and fuel trim issues and the misfire. Also today the fans decided to stay on after key off indicating the need of a new thermostat which would explain the low wandering dash temp needle. That event required me to disconnect the battery and the log on the way home showed more even banks maybe the problem will go away on its own I am hoping.

I will be replacing the O2's this weekend to help with the situation but what is the most likely culprit? Do these injectors really have that many problems? If I do replace that one I am wondering if you guys really replace the tubing connecting the rails any time its serviced?

Any pointers on this delicate system would be highly appreciated. I would like to treat this truck with more dignity than my gen iv!!!