Started the car, A.C. compressor did not come on. Lifted up on the ignition switch with car running. A.C. came on. Worked fine. Called the dealer. I was told that the problem is not happening a lot, and that they have to see it happen. I asked again if they could test the ignition switch. He said there are a lot of contacts in the switch. I spoke with GM customer service. They are still working on it, they are sending my concerns out, trying to resolve this issue. I am starting to think there are gremlins. Thank you, hope someone knows what is going on. Have a great day