What version you got? Nougat or Oreo?
If Oreo, you have to downgrade your google services. To do this, go to settings, apps then locate google services and uninstall updates. It should revert back to 11.9
On AA go to about, then tap about android auto untill you see your a developer sign. Then tap the 3 dot and developer settings. Check all 3 below. Unknown sources, 720p, 1080p. Exit and connect your phone to uconnect you should be all set