Hi all...i have a 2013 jeep grand Cherokee Laredo with stock RES radio...it has uconnect...voice command.. Etc... I would like to upgrade to the RBZ touch screen radio..I dont need navagation or back up camera...just like the look of it...question is will it work with current wire harness or do I need to buy a new one..I see them going for About $400 on ebay but don't want to make purchase until I know if it will work with my model... Thanks for the help!!