Not sure about factory headlights 2015 GMC 2500HD
I read most of the forums about the crappy headlights on the 2015 GMC Sierra 2500. I bought the highly recommended kit from retro fit source. Nothing matched. The projector didn't fit, the wiring harness didn't match anything on my truck. When a bulb burnt out, it had a regular Halogen in it. I bought the truck used so I am now wondering if it came with factory HID's and someone stuck regular bulbs in it. Will that even work? How can I find out what is going on with the lights? Retro fit source was great to work with but they didn't know how to tell what came on my truck.