Ok, so I have 2 12" subs that hit like a champ. While I don't have my cab dynomatted yet, I think that most of the rattle that you hear outside of the cab is from the cab vents. Has anyone else noticed this and what have yall done about it?

 

The cab vents are usually what you hear rattling outside the truck. They sometimes sound like the rear glass rattling. I just went ahead and dynamated mine when I was doing the cab. The only downside is that the door is a little harder to shut with the windows up.