watsup, i bought my caddy with a sony xplod hu already installed. In the last few days its been acting weird when it is closed the outside screen works fine but when you open it the inside screen and buttons light until its almost in view then all that shuts off but the buttons still function so i want to replace it. Since its already had an aftermaket headunit is there still problems ill run into or do i just wire up the harness and call it a day like on a regular car. Thanks in advance!!