So my tailgate glass is so slow to go up, won’t close all the way, rear key won’t work, and tailgate latch won’t work. I ordered a parts to rebuild the tailgate, including a new motor/actuator from motor city K5. I’m having a little anxiety about this project. I can’t find any YouTube videos showing this. Anyway be have any experience rebuilding the internals of a K5? Any advice would be greatly appreciated!