How do you change an ignition switch on an 87 Cadillac Deville?

If you don't have the specialized tools to remove the telescopic wheel, best to take it to a locksmith. Or, remove steering wheel, compression plate and wheel tensioner, signal lite switch, hazard lite switch, signal lite 'drumstick' arm, pull up on plastic switch housing and wiring harness until it clears the steering shaft, remove key buzzer holder, remove torx screw and wiggle out ignition switch. replace in reverse order using specialized telescopic steering wheel tensioner.