This product is for the new gm style tow mirrors. you take you old one out and pop this one in, only thing you would have to do is tap into a ground, blinker and drl wire.
What is a Switchback, Switchback is where you have white leds on while you are driving and then when you turn your blinker on it will blink amber.
all sales are final and there is a 1 year warranty on all parts.
if you have any questions shoot us a message at 901-848-1655
if you would like to buy these in mirrors already installed go to this link below