how do you diconnect the security system of the 1998 buick lesabre
either you have a malfunction in the switch in the column, or you have a problem with your key- see a professional either at a dealership or local mechanic who can test it and tell you what is wrong- the dealership will have all the proper tools to work on it. you cannot disable it- it has a special key that must be used- also try cleaning the key off, waiting 10 min. and then try to start it again. it has a black piece in the middle of the key- make sure that is clean. that black part has a resistor code that must match what is in the ignition switch or the car won't start.
this guy know what he is talking about, he really sovled my problem
This answer is wrong you can disable it by using resistors that measure the same Ohms as the resistor imbedded in your key. The wire is an orange wire with two white wires inside simply connect your resistor between the two and you will bypass the one in your key.
Cut the main power supply and use a push button.no power, no anti theft
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