Factory backup camera question??


It's only money
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