What is the name of ignition component in steering column 1994 buick regal but not key switch?

The ignition component in the steering column of a 1994 Buick Regal, other than the key switch itself, is the ignition switch actuator or sometimes called the ignition lock cylinder. While often referred to as just the "ignition switch," this more precisely describes the entire assembly. The actuator is the mechanical part that engages with the lock cylinder and translates the key's rotation into electrical signals.