You need a new ignition cylinder with a new key with the right resistor.
How to by pass a pro lock on cadillac
make sure everything is off (radio, etc). place your key in the ignition, half turned on, for 20 min or so and that will reset the security system. i had to do this with my 2000 deville and it worked. try it at your own risk. goodluck
A flashing Security light is indicating that the security system on your car is active.
You can reset the theft system in your 1994 Cadillac Deville by putting the key into the ignition. Turn the ignition to the auxiliary position, without starting the engine. Leave it in this position for 30 seconds.
Majority of the time the problem is in the ignition key chip or ignition lock cylinder
97 deville theft system problem
The easiest way to bypass your 1998 Chevy Cavalier factory security system is to remove the fuse. The security system fuse can be found in the fuse box.
where is the vacuum system on a 1994 cadillac deville and how do u vacuum it
try resetting security system
Depends on the model of the car. However most did come with a security system
Yes,you can buy a VATS bypass module for $30 == ==
yes it can contact me at cadillac1997etc@yahoo.com and i can tell you how!