Tom, good you have a Chebby, but the next question is, are the turn signal and the brake lites on a seperate bulb? If yes, then you can wire them seperately. Before you start, crawl under the rear of the TV. On the 2nd to the rear crossmember to the left(drivers) side there should be a square Box, if you will, that has 4 retangular connectors in it. There should be a connector (2) that goes to each tail lamp assembly. Just tug on each harness and look where it goes. Once you figured out which is which, use a test lite the find the t/signal wire ( lite blue) to both sides on mine, unless GM has changed the color code. You can solder a wire in at the harness or do it at the sockets at the lamp assemblies. Your choice. Find 2 wire colors and run a dedicated wire for each side in the harness to the plug and to the mid-ship t/signals. No extra wires are needed for a ground. This would also be a great time to run a wire for back up lites. I used a 4 pronge trailer plug and mounted it under the 7 pronge for the Horn. Now that you totally confussed....I will send you a PM with my Ph#. Bob