I have looked through here and cannot find what I am looking for. I want to install tow mirrors on my 2011 GMC 2500HD. The stock mirrors are power and heated but no turn signals or folding. SLE package. If I were to install tow mirrors, power adjust, heated and turn signal, will the turn signal work? if not will it cause any problems when I hook them up? Not sure if my truck is prewired for the turn arrows. I called the dealer and they were not sure. Any help is appreciated.