Will a 2011 head unit work in a 2005?

looking to buy a head unit of another member here, but not sure a 2011 head unit will work in my 2005. My current unit is plain single cd. The one in looking at is multi-disc, with satellite radio. Will it fit and function without mods and does the satellite portion require an antenna?

* Update: It will fit, but Satellite radio needs extra hardware from originating truck as I've been told.

 

As long as its the same package (JBL/Non-JBL) it will fit. And yes you'll need some extra components for the Sat radio.

 

ok, thanks