The ignition lock cylinder on your Ford F-250 controls the power routed to the accessories of your truck and is responsible for the ignition controls. If your ignition cylinder is beginning to stick, replace it as soon as you can. If it seizes up, you risk damaging your steering column when you remove it. Buy a replacement cylinder with a new key...
M/F Turn the ignition key to the “RUN” position in the ignition cylinder. Use a small Phillips head screwdriver or similar object to insert into the hole beneath the lock cylinder on the steering column.
M/F Push up on the release lever inside the hole while you pull the ignition lock cylinder straight out of the steering column. Discard the old ignition cylinder.
M/F Insert the key that came with the new cylinder into the new ignition cylinder. Turn it to the “RUN” setting. Push your screwdriver straight into the hole to press the release lever while you insert the new cylinder in the column.
M/F Release the lever once the cylinder is secure. Test the new ignition cylinder by cycling it through all of the settings.