On my 2000 GMC Sierra, I need to install a 4 flat wire harness. The only problem is the wire set up under the truck is 6 wire, 1 light blue (by it's self), 1 brown (by it's self) 1 dark green, 1 light green, 1 yellow and 1 white (all together). The harness that I need to connect to has left turn, right turn, tail lights and a ground. How do I put this together? Thank you.
