1. Turn on the radio.
2. Press and hold the "Seek" button for at least 5 seconds.
3. While holding the "Seek" button, turn the ignition key to the "ON" position.
4. Continue to hold the "Seek" button until the radio displays "Unlock" or "Safe Off".
5. Once the radio is unlocked, you can release the "Seek" button.
6. You should now be able to use the radio normally.