How do you replace horn switch on 2000 Buick Century?

To replace the horn switch on a 2000 Buick Century, first disconnect the negative battery cable to ensure safety. Remove the airbag module by carefully prying off the retaining clips and disconnecting the wiring harness. Once the airbag is removed, you can access the horn switch by unscrewing it from the steering wheel. Replace the old switch with a new one, reassemble everything in reverse order, and reconnect the battery.