I just installed my ECM from Overkill and my check engine light is on, called my local GM Stealership, and they acted like they had no idea what a case re-learn was. I explained I have a tuned ECM in and they told me the only thing they would do is reset it to factory settings. They will not even mess with any aftermarket ECM and let the car leave the shop without the stock ECM settings.
What the heck do I do now? Only GM dealership in the area - called them twice to re-explain but I get the same answer. Two local shops I've called don't have the tools to do a re-learn.
