How do you change an ignition switch 2004 GMC sierra?

To change the ignition switch on a 2004 GMC Sierra, first disconnect the battery to ensure safety. Remove the steering column covers by unscrewing the screws, then disconnect the ignition switch wiring harness. Unscrew the ignition switch from its mounting location, replace it with the new switch, and reconnect the wiring harness. Finally, reassemble the steering column covers and reconnect the battery.