2001 buick lesabre - display lights on DIC worj intermittently. When not working they flash garbage. When they are working the information displayed is correct. Sometime they work for 3-4 days and somtimes on a few minutes. Almost as if they is a faulty connection.
If the messages are all garbled when the failure occurs, it could be an indication of internal fault with info display/instrument cluster. It could be temperature influenced, or intermittent with it's own circumstances for failing.