Cadillac Repair: 90 Deville Theft Deterrant System, vats bypass, theft deterrent system

Question
I have a 90 Sedan Deville 4.5 which is the first year that offers the Theft Deterrent System which what i am having a problem with. Recently the security light is no longer coming on and the car will not start. The battery is good and the alternator is getting and sending out power and there are no blown fuses and the car wants to start(clicks when you turn the key) however nothing even starts to crank to start the car. Is there any suggestions that you can think of that will get my car operational again?

Answer
Hello,

The VATS has been an antiquated, problematic piece of GM garbage for 19 years. As you know, electronics are good for 6 months before obsolete. GM ran the same system for 19 years!!!!!

The most common problem is that the VATS wires break in the column causing the engine to start at times. Try tilting the steering column, running it through the gears etc. You might find the engine will start. You will need a new lock cylinder assy. Cost from a dealer is $500 and from a locksmith $250 with the same exact parts. DO NOT try replacing the steering column which will just exastrabate the problem.

If you get it running, go to an alarm store and have them install the VATS bypass kit. They through these things out because they come with every remote start.

Have the system bypassed. They know how.

Now, you have no protection. It is 30 seconds to peel the steering column to steal it. They steal old cars all the time and don't think they don't.

After bypassed have a HIDDEN starter disable switch put in. That way if they break the column, they are not driving off with the car.

Good Luck!

Rob