What can you do with a 1995 buick lesabre with the secruity light on and car will not start?

My 92 Lesabre broke the little security wire where it attaches to the ignition switch. Every time you turn the key, it flexes the wire. There was enough slack coming up the column for me to splice/solder back together. I had to take the steering wheel off and remove the steering wheel lock. Be careful with the airbag! You can probably find how to remove everything on this forum.

There are two thing that will cause this. One being the chip in the key is no good, or the security/anti-theft computer is no good. Try your spare key firts. If not, tow it to the dealership for the computer as it will need to be flashed and will be costly.