i have the non lighted sides.... so the 8 pin connector had 6 wires going to it. 4 for power and 2 for the defrosters. I used the stock wiring plug for the power mirrors and I have been too lazy to rig up the defrosters. Without having the lights on the cab, i like not having the side markers. If I had the clearance lights, I would get the LED sides. 88GMCtruck did a writeup on the install of these guys. I did it over a few smoke breaks in the day. The hardest part was not dropping the nuts into the door. I also had to have my 6yo daughter give me a hand and push the mirrors towards the truck so I could start the nut on the top bolt. They fit right on though with no modification required. The glass on the mirror vibrates a bit but no more than my buddies d-max that has them stock. The base itself is solid.