I want to close this out with a solution for the next guy that finds this post because he’s chasing down a weird noise somewhere in the dash. Well I finally found it, me not the dealer. The noise is coming from the motor/gears in the HUD. When it gets warm here in AZ it’s causing something to slip inside. The rapid clicking must be when it’s doing self check prior to start. But when I start the truck and adjust the HUD you can hear it click and see the number jump at the same time. The same kind of echo click if you compare to the rapid one. I’ll post a vid