I got my camaro in November and then about 3 months ago I bought a set of OEM LED RS taillights. In my rare free time, I had been looking into how to make them work with the non-rs wiring. After contacting several people, getting some responses here and there and delays other places, I just decided to solve the issue myself. I made a retrofit harness and tested it prior to pulling the bumper off and lights out. I did have to run load resistors with the LED tails as was expected, so I made up small brackets to mount them safely.
I was able to split the turn and brake signal without having to tap into the 3rd brake light or run wires to the front of the car to the front directionals. Everything is contained right by the rear taillights(under the covers) with no permanent modifications made to any of the factory wiring. My total cast was around maybe $50.
Even though I liked the LS taillights, these LED ones are so much better and they were kind of the reason I decided to get a 2014 Camaro (Its just a lease so that's why I didn't want to pay for the RS package). When I turn the car in, I can remove the RS taillights and sell them with the harness and then put my stockers back in. I also have a pair of RS headlights which will be getting put on my car in the next few weeks. I already made up the wiring plans for them and just need time to make that harness.
Everything functions as it should. The way I have it set up, when you turn the hazards on, the brake lights flash and not the small turn signals. I think it's safer that way since they are obviously more visible than the turn signals.
Here are some pics and then a video at the bottom.
And here's a quick video of the functions.
http://youtu.be/6x0SJn5h8X0