I have a 2005 Mustang GT Convertible that has an awful creaking noise in the front driver corner of the dash. It appears to come from the area where the dash meets the windshield. I have no clue how to detect and identify or fix it but it is highly annoying and loud any time you go over any sort of bump. I appreciate any and all suggestions/ideas.

 

Yep, same issue as mine when cold. Driver side where the dash and windshield support meet on the inside. The only way to address it would most likely be to remove the dash and find the offending mounting point(s) that cause it.

I may get into it myself if it gets any worse.