How do you replace windshield wiper switch on 91 sonoma?

To replace the windshield wiper switch on a 1991 GMC Sonoma, first disconnect the negative battery terminal to ensure safety. Remove the steering column cover by unscrewing the screws, then locate the wiper switch attached to the column. Disconnect the wiring harness and unscrew the switch from the column. Install the new switch by reversing these steps, ensuring all connections are secure before reassembling the column cover and reconnecting the battery.