Hello, I need some help, and I promise I will listen to your opinions. I own a 2017 Chevy Tahoe (a former PPV model). My scanner indicated a misfire in Cylinder 2. I proceeded to replace the spark plugs, spark plug wire, and ignition coil, but the misfire persists. Upon checking the scanner again, I noticed several other codes as well, including U0100:00 (Lost Communication with Engine Control Module), U0401:71 (Invalid Data Received From Engine/Powertrain Control Module), U0422:71 (Invalid Data Received From Body Control Module), P0202:00 (Cylinder 2 Injector Control Circuit), and P0300:00 (Engine Misfire Detected). Some videos I’ve watched suggest checking the chassis ground connections, while others suggest that I need to reprogram the ECM/PCM. One other thing: I have already checked the fuel injectors, and they are all in good working order (they all have the same resistance). I also noticed that Cylinder 2 is not receiving any electrical current; I’ve ruled out the wiring harness as the culprit, as it appears to be in good condition. In fact, the specific wire responsible for delivering power to that injector harness—the one intended to feed Cylinder 2—is itself not receiving any current. I honestly have no idea what could be going on. Thanks in advance; I will read every single suggestion! THANK YOU!!!!