I hate be the bearer of bad news but the same thing happened to me, the difference being that I could never start mine, new key or not. I took it to the Caddy Dealer here in Cleve, Oh and after $980.00 my Deville started. They replaced the Cluster they told me. Shortly after that, they replaced the same part under the warranty and yet again a third time, go figure. While there the started went while the auto was standing still, I got an idea that this may have been the original problem. One more thing that went wrong while the car was idle in place, the Wiper Motor and now they tell me I need an Alternator. I am not going there anymore and I wish I could report it to someone, I believe they just took my money or at least some of it. Good Luck to you.
