How do I reset the security on my 1999 Cadillac deville base 4.6l v8
The security light is flashing and it won't crank. I've
unhooked the battery for 12 hours, turned on the key for 30
min, rubbed both posts together for 2 min (I know). The
security light keeps flashing still. Can anyone help me ????
The problem is most likely the lock cylinder. You have the VATS (Vehicle Anti-Theft Security) system. The replacement lock cylinder will come with a template for making new ignition keys. BUT you must visit a GM dealer or a good lock smith to determine which VATS key you have. There were 15 possibilities. Otherwise the new keys won't work. I'm assuming your ignition key has a chip on it like the one pictured. HTH. -Jim
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