I don't have satellite radio. The Jvc requires a separate adapter which I did not buy, I think it is $90 or so. I may do that later since I have an XM subscription which is just being wasted. My truck has no factory antenna. I have heard, however, that you can leave a satellite antenna inside the truck and it will work fine. Right now it seems like I have a lot of entertainment. I can listen to radio, cd, ipod via bluetooth or plugged in, and Pandora. And my kids can watch youtube videos from the passenger seats. The ipod nav costs 99 cents and it is actually usable. You see the map on the jvc screen and hear the voice commands. All the functions are on the ipod, however. The touchscreen of the headunit is disabled.
Concerning the parking brake wire, the instructions say to attach it to the parking brake. Some units allow it to be just grounded, some don't. The JVC does. I have no intention of watching a movie while i drive, but I want to allow my passengers to do it, and it was just simpler to solder it to the main ground. There are several threads on the forum about this, just search.
Steering wheel adapter is the metra aswc. It is a little tricky to install, much more so than the headunit. Basically you have to connect wires to the back side of a factory plug in the dash opening. Vampire taps are used. I will send some links about this.
I also connected my rear camera output the the headunit.
Overall the install was not too difficult. I have an electronics background and know how to solder and wire things. The vampire taps were new to me and they are great to use.
I bought the jvs kw avx840 from amazon
for $370, scosche
double din and harness and metra aswc