Your right it did not work, but i think he told me he was putting on the DRL side, I will try to find a 6.2 to test it on that truck, we had the harness long before, on 20 Jan but there where for and still only recommended for the HD trucks, ( all we have is an HD in our fleet ) i told Payton34 that on the phone, said they may work on 1500 but have not been tested, from the wiring schematics things look like they work, but as you see they dont always do, and until some one tests it we dont say it will work.
Now for the people that think a DPST relay will work for the turn signal going off it will, but and you may like this, here is whats going to happen, you will look like a cap truck as the relay will flash from white to amber/orange to white and so forth, and we tested this out, what we have is a relay that when it gets triggered will cut the power to the DRL on the one side for as long as you want and then when the trigger is removed the power to the DRL comes back on after the time that you set it has passed.
Its not a cheep fix, a per of the relays cost more then $60 our cost, so dont think many will want that harness thats why have not spent lots of time on it, IMO the way they work now is fine with most members.
One more thing have 2 sets of NEW headlights brand new in GM box, call and will make you a deal.