Don't forget, you will need the new center stack with the button. If you are doing the full ACC as in this thread, then you will have it.
The wiring harness in the back isn't too hard to remove. You will want a trim tool so you can remove all the little push in connectors that hold it to the body. The new harness comes with them already installed. Also, the new harness has tape on the end leads that connect to the two outboard connectors.
It is possible that you may not need any sensor for the front. I am not 100% sure on this, but I think if you have the six sensors in the front, you are good to go. The reason I say this is because I hadn't replaced the sensors yet and I had no errors. I did replace them and if it weren't such a PIA to get to them, I would remove and try it again. I have tested this several times and it works great. I showed it to several people, and they were amazed. I will say the first time it did it, I was concerned on how close it comes to the cars when parking until it straightens up.
If anyone has any questions on these, just let me know. Thank you for following up with this
@MannyN . I was going to put this together this weekend since I did it last weekend.