I have a 94 deville concours and after changing the battery, (after it was sitting dead for a month) the alarm - siren went off and won't let me start it. Key works in any position but, start. I tried all the instructions in the manual for disabling the alarm. I thought someone tried to put a different key in it, trying to steal it.
Do you have any suggestions for me in disabling this? You really think cleaning, or buying a new key will solve this?