this is caused by ignition lock cylinder failure, you will have to replace the ignition lock cylinder and key.
this site will help
The ignition switch is immediately behind and attached to the ignition lock cylinder. The ignition lock cylinder is where you place the key to start your vehicle. If you are haveing problems with your vehicle not starting and or turning the key, more than likely you need to replace the ignition lock cylinder. It is common for these to go bad in GM vehicles.
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?
To recode an ignition lock cylinder, first, remove the lock cylinder from the steering column or ignition assembly. Next, take out the existing tumblers and replace them with new ones that match your key, ensuring they align correctly. Once the tumblers are in place, reassemble the lock cylinder and reinstall it in the vehicle. Finally, test the new key to ensure it turns smoothly and operates the ignition.
Removing a ignition lock cylinder from a 2002 ford windstar with no key
To replace the ignition lock on a 1991 Oldsmobile Cutlass Ciera, start by disconnecting the negative battery cable to ensure safety. Remove the steering column covers to access the ignition lock cylinder. Insert the key into the ignition, turn it to the "Run" position, and locate the release tab or pin to remove the lock cylinder. Once released, replace it with a new ignition lock cylinder, reassemble the steering column covers, and reconnect the battery.
You need to replace the egnition key cylinder.
I would replace the lock cylinder.
To replace the ignition key lock cylinder on a 1988 Ford Bronco II, first disconnect the battery to ensure safety. Remove the steering column cover by unscrewing the screws, then locate the ignition switch and remove it. Insert the key and turn it to the "Run" position to release the lock cylinder; then, remove the old cylinder and insert the new one. Reassemble the steering column cover and reconnect the battery to complete the replacement.
Any decent locksmith can rebuild the lock cylinder it for $25 - $50. DO NOT TAKE IT TO THE DEALERSHIP
1. Close the vehicle doors.2. Turn OFF the ignition.3. Remove the key from the ignition.4. Press and hold the driver side door lock switch in the UNLOCK position.5. Insert the ignition key into the ignition lock cylinder and remove the key. (Do not turn the ignition key in the lock cylinder.)6. Insert the ignition key into the ignition lock cylinder and remove the key. (Do not turn the ignition key in the lock cylinder.)7. Insert the ignition key into the ignition lock cylinder. (Do not turn the ignition key in the lock cylinder.) Leave the ignition key in the ignition lock cylinder.8. Release the door lock switch. The vehicle will sound three beeps in order to verify the Program Mode has been activated.9. Press the LOCK and UNLOCK buttons together on the keyless entry transmitter and hold until the vehicle beeps twice to verify that the transmitter has been successfully programmed (this take approximately 15 seconds).10. Perform the previous step to program up to four transmitters (including your old ones).11. Remove the ignition key in order to exit the Program Mode