I have a 2008 2500HD SLT with Navigation. When the radio is off, the time would show up in the center of the screen. When the radio is on, the time is displayed in the right corner. I disconnected the batteries to work on the front airbag sensor. After I was done, I reconnected the batteries and noticed that the clock on the screen does not display. When I try to set the time, nothing shows up. Everything was working before I disconnected the batteries. Anyone have this issue in the past?