is it the ignition switch or the key that is causing theft system problem 99 deville?

Answer 1

Favorite Answer

if it is an after market anti theft system you might need to have it removed.

Answer 2

If the chip in the key is in good shape, then it's probably the ignition lock cylinder. There are 2 small wires attached to the lock cylinder that are prone to break after years of use. Don't try to fix it yourself! It takes experience and special tools.

Answer 3

If you are experiencing an intermittent no start condition you probably have a bad ignition lock cylinder the two wires that come off of the cylinder tend to break due to normal use.

Answer 4

90% of the time its the ign lock cyl . wires beak into over time.