2001 Chevy Lumina

If the security light is coming on, that is shuting the engine off. The security system needs to be scanned to identify where the problem is coming from. You can try a different key if you have one. Otherwise, and I hate to say it, it needs taken to a dealer to have the system scanned. They are the only ones with the proper test equipment to check it.

NOTE: If you turn the key to the run position for aprox 10 minutes, the security light should shut and the engine should start.

Let me know.
Joe