How do I reset the security on my 1999 Cadillac deville base 4.6l v8


Asked by Jul 28, 2016 at 07:04 PM about the 1999 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

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  ????

6 Answers


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

3 of 3 people found this helpful.

Yes, but it turns over. The fuel pump doesn't click on like you'd normally hear, replaced the fuel pump. Still the same thing. I have 2 sets of keys and it does it with both.

1 of 1 people found this helpful.

Have you checked or replaced the fuel pump relay & the fuel pump fuse? HTH. -Jim


Just put a new fuel pump sending unit on it

1 of 1 people found this helpful.

Relays and fuses too.

2 of 2 people found this helpful.

You'll need to see if you have power at the fuel pump. If so, the pump is defective. HTH. - Jim

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