How do you replace ignition on 2006 GMC Sierra?

To replace the ignition switch on a 2006 GMC Sierra, first disconnect the negative battery cable to ensure safety. Remove the steering column covers by unscrewing the necessary screws, then locate the ignition switch. Disconnect the wiring harness and remove the mounting screws to take out the old switch. Install the new ignition switch by reversing these steps, ensuring everything is securely connected before reconnecting the battery.