TerryA2218

Hello I am wondering if someone can help me. I am wanting to buy a set of tow mirrors for my 2016 gmc seirra. My gmc mirrors now have just power adjustment. The mirrors that im looking at have turn signals in the mirror and on the back and the lights that shine down on the ground. Do I need to pull my inside cover off and see what all pins I have on my mirror plug or is their a harness I can also purchase to plug into the existing harness and plug into the new mirrors?

Need info on tow mirror upgrade for a 2016 gmc