I want to replace my oem sync with navigation. My 2010 SHO is push button start. I am having a hard time finding the correct head unit and harness to keep all the steering wheel controls and my climage controls. Metra system says for key start only and replace the center panel and moves the head unit down and comes with a relocated (up) climate control panel.. I just want to replace my head unit and keep all the functions. Can anyone assist in giving me the correct harness or solution to the my problem.