I have issues with the Grand Am GT 3.4 not starting. I have replaced the BCM. The cars dash warning lights stayed off for a while after this was replaced. Then they started to come back on periodically, and not always the same ones. Now today the car would not start. The car goes through the startup cycle with all the warning lights going on just fine, but when you turn the key nothing happens. No sounds at all. Its like there is no engine in the car at all. I have read that it could be a security module? Is there such a thing? If not, any Ideas? Please help, I'm trying to sell the car and I can't sell it like this to someone. Cheers, Paul