In my 2013 Sierra, I have a factory backup camera that displays through the mirror. I have the factory standard radio, no nav. My question is, I'm going to be replacing soon with a pioneer nav, and really want to transfer my factoryou backup camera over to my screen? Is this a possibility?  I haven't seen how the mirror is wired and hooked up, but I feel like there has to be a video feed going to it that I could go off of but wanted to see if anyone else has done this. 
Thanks guys
--Josh
				
			Thanks guys
--Josh
 
	 
	 
 
		 
 
		