If you don't want to change the ignition switch out of the column you can get ignition switch for your car( new ) and just plug it in under the steering column where your original plugged in
I highly doubt that, you cannot bypass the security system, or eliminate it. You have to reset it. Check the owners manual for the procedure.
Have the car crushed, then you won't need to bypass it.
Good info Justin.
Looking for a Used LeSabre in your area?
CarGurus has 10 nationwide LeSabre listings starting at $4,395.
Search Buick LeSabre Questions
Buick LeSabre Experts
Related Models For Sale
Used Cars For Sale