i picked my truck up last night and all seems to be well. The diagnostic trouble code (DTC) was P16F3-Internal Redundant Memory Performance. Apparently, when the ECM trips this code it can usually be fixed with a re-flash of the ECM. In my case, the dealership could get no response from the ECM when attempting a re-flash, diagnosis-bad ECM. I doesn't seem that this is a very common problem per the Service Manager, but he has seen it on other models (Cruze and Corvette). Now that I know the code and did very minimal research, it seems as though it can have different impacts and the Reduced Power Mode usually can be cleared by a drive cycle( shutting down the vehicle, removing key, opening door, closing door, restarting the vehicle). This will leave the check engine light on, but MAY allow a return to full power mode, which will at least get you to where you need to be without a tow. Unfortunately, if the ECM has an internal fault, like mine did, its a wrap.
All of this was covered under warranty including the tow to the dealership. So besides a minor headache, it didn't cost me anything. Hopefully, no one else has this issue, but if you do this may shed a little light on it.