My 97 bonneville won't start the security light comes on and it won't crank

Try the "10 minute key on" to re set the passkey security. Go look at: http://www.cargurus.com/Cars/Discussion-t24772_ds544194 and look at what tenspeed and John wrote. If you are not familiar with this website, how it works, copy that link and paste it in your web address box (not search engine) or it might even link you directly if you highlight it, right click on it, and 'open in new tab'