12668986, 12692201. The engine t ypes may include 1.4L 1364CC 83Cu. l4 FLEX DOHC Naturally Aspirated,1.8L 1796C C 110Cu. l4 GAS DOHC Naturally Aspirated,4.8L 294Cu. V8 FLEX OHV Naturally Aspirated,6.0L 5967CC 364Cu.
It would run perfectly for weeks, then refuse to start for an hour, throwing no consistent codes. After exhausting all other possibilities—checking fuel pressure, ignition components, and wiring harnesses—we focused on the ECM.
You might be dealing with a persistent Check Engine Light, sudden stalling, rough idling, or a vehicle that refuses to start at all. He’d already replaced the battery and starter to no avail. After hooking up my diagnostic scanner, I saw no communication codes, but my experience pointed to the ECM.