You have a failed antitheft security system. The key is most likely the problem. That little chip tends to wear down. It could also be a few other things. Since the light is flashing, it will either be the key or ignition lock cylinder. If it wear solid, then it would be the TDM (Theft Deterrent Module) which is the brain of the security system. Try rplacing the key. if that doesnt work you have 2 choices. Replace the ignition or bypass the security. There are 2 ways to bypass your car. BOTH will work for you. Ive done it. This link will help you understand the system and guide you with pictures and those 2 other links. Any questions, comment back on THIS post. Im good with BUICKS and always willing to help. Thanks for using FixYa
http://vatspasslockpasskeysecurityhelp.yolasite.com/
373 views
Usually answered in minutes!
×