Does the ECM respond to any requests? Can you get the part number off the ECM?
Would look like the attached in the tune.
If that matches, I could send you the stock cal from my wifes 2015 Malibu 2.0t. 12653998 does show as compatible with a 2014 ATS 2.0t. The calibration probably wouldn't be exact, but it should work if the part numbers match.