There are different procedures for different vehicles. Repost the question with more info.
How do you remove ignition tumbler 1998 ford Mustang?
Remove the retaining ring from the top of your 1977 Chevrolet pickup truck ignition key tumbler. Slide the ignition key tumbler out. Remove the wiring harness from the end of the key tumbler.
Remove the ignition retaining ring. Pull the ignition barrel out. Remove the wiring harness from the back of the ignition barrel. Reverse the process to install the new ignition key tumbler.
ask your local car thief
key switch tumbler removal on 1998 astro
To remove the tumbler and ignition switch from a 2002 Pontiac Sunfire, first, disconnect the negative battery cable to prevent electrical issues. Next, insert the key into the ignition and turn it to the "Run" position. Use a small screwdriver to press the release pin located on the ignition switch assembly and then pull out the tumbler. Finally, remove the ignition switch by unscrewing any retaining screws and disconnecting the wiring harness.
Remove the screws on the side of the steering column. Remove the screws underneath the steering column and pull the bottom half of the column down. Slide a pin punch into the hole at the ignition tumbler assembly's bottom. Force the tumbler upwards and pull it out of the steering column.
To remove the ignition tumbler from a 1997 Chevrolet Cavalier, first disconnect the negative battery cable to ensure safety. Then, remove the steering column cover by taking out the screws. Insert the key and turn it to the "Run" position, press the release pin or tab located on the ignition cylinder, and pull the tumbler out. If the tumbler doesn’t release, you may need to rotate the key slightly to find the proper alignment.
3 screws facing the engine
To replace the ignition tumbler on a 1985 Oldsmobile 98, first disconnect the battery to ensure safety. Remove the steering column cover by unscrewing the screws securing it. Insert the key into the ignition and turn it to the "Run" position, then locate and press the release pin on the tumbler; you can then pull out the old tumbler. Finally, insert the new tumbler into the ignition switch, ensuring it clicks into place, and reassemble the steering column cover.
To remove the ignition tumbler from a 1989 Mercedes 560 SEL without a key, first, disconnect the car battery to prevent any electrical issues. Then, locate the small access hole on the ignition switch housing; use a thin tool to push in the release pin while turning the ignition switch to the "Run" position. If the tumbler is stuck, you may need to drill out the tumbler or use a lock-picking technique. Finally, once it's released, you can pull the tumbler out.
Key or ignition tumbler is worn. If you cannot remove the key, then you will have to remove the tumbler assembly and replace it. If you can get the key out, then try a key that is not used very often. If it works, have a duplicate made of that key and destroy the other key with the problems.