Trinity,
I only have an external unit so I can't say.
I would search CRUTCHFIELD.COM. They have a lot of XM and SIRIUS satellite equipment including in-dash units. Also, they have fitment guides and install kits to make sure you get the right fit for your vehicle. They aren't always the cheapest place on the web, but their site is a great resource. Another option would be to browse XMFAN.COM or SIRIUSBACKSTAGE.COM in their equipment forums.
Good luck!