Hello,

I have a 2013 GMC Sierra 2500HD Denali with built in Nav/DVD up front. The question I have is this. I want to add a headrest monitors for the kids in the back seat. Is there a way to connect to the Nav/DVD system up front to control play a DVD through the main head unit up front? I don't want to add a second DVD play, nor do I want to change out the front head unit. I don't know if the factory Nav/DVD head unit has a Video out port or when you get the factory entertainment system in back do they also swap out the head unit?

I have looked at the GM Lock pick found here: http://www.coastaletech.com/ But not sure if this is what I would need or do I need anything?

Please help.