how do I reset security system?
I had new battery installed and when I try to start car the diagnostic center says may not start due to security code--how do I reset the security system code(s)?
Without the security code you will need to take this to the dealership along with proof of ownership (a title or registration card with your name on it) and have them reset it for you.
where do I find the security code for my 1997 cadillac deville
Disconect the battery, wait and reconect. I have had to do this with mine. The system will reset.
How do I reset my car alarm 2002 Cadillac Deville?
I'm asking this question . I just put a new battery in and my car won't start due to this stupid car alarm on my keys.