The owners manual does not tell me how to program the remote transmitters. I had to purchase a new one and I don't know how to program it. Can you Help? I can not find a dash mounted LED light or a Valet Switch. I bought the 2006 Silverado with the system already installed. I found the Box by tracing the antenna wire but I can not find a Valet Switch. Is it possible that it was left out of the original wiring?