How do you remove and replace the ignition cylinder on a 93 GMC Jimmy?

To remove and replace the ignition cylinder on a 1993 GMC Jimmy, first ensure the vehicle is in the "OFF" position and disconnect the battery to prevent electrical issues. Insert the key and turn it to the "RUN" position, then locate the small pin hole on the ignition housing; use a paperclip or a similar tool to press the release pin while pulling the ignition cylinder out. Once removed, install the new ignition cylinder by aligning it correctly and pushing it into place until it clicks. Finally, reconnect the battery and test the new ignition cylinder with the key.