Ratteling In The Dashboard

[Kodiak450]

This question is manily for the 03-07 (classic 2500 people). I keep getting ths rattleing vibration noise coming from inside my dash when on the highway doing 70-80 mph. I thought it had something to do with my aftermarket head unit's wiring harness so I placed it in a different location and it wasn't it. I also made sure my little speaker chime box was secured and have that mounted low under the steering wheel. The speaker chime box is a add on because I am using an after market head unit and the chimes no longer come through the speakers like it did in the stock stereo.

 

Anyway just trying to see if anyone else has experienced a rattleing vibration noise, or I have to do some more searching and try to identify where the noise is coming from.