Can the fix a dash rattle? And how much to diagnose?

I totally agree, with previous message, give Johnny’s a call, good luck

Best thing is to give them a call. I do know they do all sorts of repairs. As far as the cost of diagnostics depends on how deep they have to go. Some rattles are easy to find, others not so much.

Hoping you were able to reach us. We are in the office Monday thru Friday from 8:am till 5:pm our number is 863-422-2995. Thank you.