What is this?

[Booboo]

1997 GT Convertible. Any idea what this plastic tubing is, it has a wire in it. Behind the back seat.

 

[ttocs]

If I remember correctly you will follow that over to the keyless entry module. I think its the antenna

 

[Gregomatic]

Antenna immediately came to my mind, but I didn't know that's where it was located!

 

[Booboo]

The antenna in located on the passenger fender, so I don't think that's it.