i did the swap on my 07GT to a 2010-2014 GT500 wheel and while I was able to figure out the cruise control and got it working I was never able to get hte radio controls to work. I'm using a SWI-CP2 PAC to connect the steering wheel to my Pioneer headunit. I wish you luck if you DO figure it out I'd love to known how tot hook up the controls for the radio.
This is the vid that I’m hoping will let me get it done. He talks about the PAC & having to reprogram it to make it work. Also talks about a ground wire that most vids exclude having to be grounded. He demonstrates it working in the vid so I’m hopeful lol
I did this mod.with a pac interface. There tech support was awesome. Alot of it is having the settings on the interface matching your stereo. They were very helpful and patient with me