First off I have this thing on my roof that I have never seen on any other liberty's

Also the trim above the rear bumper how do you remove this? I tried to remove it and broke all the clips in the front It is faded and I would like to paint it

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Silver 05 sport crd-Ehm,Orm,wix oversized oilfilter,shell rotell,2nd gen fuelhead,Fumoto oil drain valve,muffler delete,cat removed,V6 airbox swap,evic added,HVAC controls modded, Franken lifted II,hercules Terra Tracs 245/75/16,Full l.e.d. interior swap,hayden fan clutch and nylon fan

That antenna could be a couple things: an aftermarket antenna that has replaced your factory one, a satalite radio antenna, or a stick on fake one. If you dont have satalite radio, id make the guess its a fake stick on one, if you still have the side mounted antenna.
The trim above your rear bumper?? not sure what your talking about. can you take a picture?