Trailer wiring harness

I have a 1997 Chev K10 Z71 4x4. I am having a problem hooking up the wiring to tow a camper. My problem is that the wire colors do not match the color coding of my trailer. I would like to know what each color of wire on the truck side is for. The color of wires that I have on the truck side are White, Brown, yellow, orange, blue, Lite green and dark green. On the 7 prong plug of the trailer side I have White, brown, blue, red, black, green and yellow