myChevrolet app will not communicate with vehicle

[COLDUCK]

I just had the ONSTAR module replaced because the navigation and other features were not working.  Everything works fine now except that the myChevrolet app will not connect with the vehicle for remote start and other features. The navigation and the other features that were not working prior to the module replacement are working now. I have reinstalled the app and logged in but still doesn’t work.  How do I get this fixed?

[Advisor_Helen]

We regret to hear of any ongoing concerns after your module replacement. To further clarify, can you please provide us with the color of the LED light near your hardware? Additionally, are you receiving any error codes at all when attempting to connect with the myChevrolet mobile app? This additional insight will allow us to best assist with any available troubleshooting moving forward. We hope to hear from you soon.