Is there a way to get an aftermarket deck into the new TL with out navi??? Thanks

Anythings possible. You should be asking what the side effects will be. For instance in a G35, Removing the Radio breaks your AC.

As for me, I dont know the answer to your question. I have heard that the 04 TL Radio is quite nice though, any reason why you would want to replace it? I have one on order and I was going to try and keep the radio but add on. I am getting Navi so I was gonna try and hack the screen with a switch to allow Video, and possibly replace the Subwoofer in the rear deck with a better one.