this site will help
I broke my key in the ignition and cant get it out. My only option I can see, is to replace to tumbler. How do I remove it?
How I can replace ignition switch cylinder from Isuzu Rodeo?.
Ignition Lock? or Door Lock?
Begin by removing the retaining ring at the top of your 1994 Ford ignition lock cylinder. The ignition lock cylinder will slide out. Remove the wiring harness from the end of the ignition lock cylinder. Reverse the process to install your new ignition lock cylinder.
You will need to attach the wiring harness to the end of your 1984 Chevrolet Blazer ignition lock cylinder. Slide the cylinder into the cylinder slot. Secure the ignition lock cylinder with the retaining ring.
You can replace the ignition lock cylinder in your 1994 Pontiac Firebird without removing the steering will. Remove the retaining ring at the top of the ignition cylinder. The ignition cylinder will slide out.
Begin by removing the retaining ring at the top of your 1996 Chevrolet Silverado ignition lock cylinder. Slide the ignition lock out and remove the wiring harness. Reverse the process to install your new ignition lock cylinder.
Replace the ignition lock cylinder.
The ignition lock switch is found under the steering column on a 2004 Honda Civic. Remove the steering column and ignition switch. Loosen the mounting screws that hold the cylinder in place. Pull and replace the lock cylinder.
Ignition lock cylinder