You have to remove the steering wheel, and it requires special tools.
how to replace master cylinder on 1996 buick regal
http://www.automotivehelper.com/topic1054152.htm or Goole "ignition switch replacement 2001 regal"
were can i locate and replace a starter for a 1998 buick regal?
I believe that the switch is located in the ignition cylinder (which you can get from any auto parts store). Unfortunately you'll need a steering wheel puller and a tilt removal mechanism before you can start with that.
How do you replace the morror assembly for a 2001 Buick Regal
buick regal
How do you replace the fuel filter on a 2003 Buick Regal?
how to replace a radiator in a 1996 buick regal
The ignition fuses for the 1993 1993 Buick Regal 3800 is located on the car's dashboard.
Why is my security light on and will not let my key come out of the ignition. 1999 buick regal
You have to get it from a Buick dealer.
how to replace windsheild washer pump 2003 buick regal