Not that old yet 0508

I have a 2016 Sierra 2500 Denali that has the ghost touch issue. I replaced the digitizer this past weekend which did fix the issue of half of the screen not responding to touch but I still have the random jumping around/ghost touch issue. Even when I turn the radio off it I still hear the random “click” sounds that it makes when it’s jumping around by itself. Since the digitizer replacement didn’t resolve the issue, what should be checked next ?