Key and tumbler stuck in on position

First if your key is worn to much is will not raise tumblers in cylinder try new key cut by code at the dealer, (they will need proof of ownership and an id to get key code) if that does not work then you most likely will need a new lock cylinder.

sounds like the ignition tumbler. if it is in park and you can't turn key back its the tumbler will have to replace the ignition tumbler and you can get it re keyed to your old key so it should not be to bad

You will have to "relearn" the new steering columns key tumbler code. Follow the steps below exactly and the new code will be accepted.
Make sure you have a battery charger on the battery so the truck battery will not drain. If the battery goes dead, you will have to start over. Read the instructions below carefully and follow exact.
1st, Turn the ignition switch to the ON position, DO NOT attempt to start the truck. Leave the key in the ON position for 10 full minutes.
After the first 10 minutes is up, rotate the key to the OFF position and leave it there for a count of 3.
2nd, Turn the ignition switch back to the run position again for 10 minutes, again DO NOT try to start the truck and leave it in the ON position.
3rd, You will have to repeat the same step for an additional 10 minutes. This will be a total of 30 minutes. After this final 3rd step, turn the key to the OFF position for a count of 10, then turn the key to the start position and the truck will start, the key tumbler code is now relearned to clear the theft mode.
Good luck.

Does the key not turn all the way back when it gets stuck? If the key gets stuck and won't turn all the way back to lock position, chances are the tumblers in the ignition switch are going bad.

turn the key slightly back and forth while pulling the key out

Most newer models have a safety feature called
shift interlock. This prevents the key from being turned back
to the lock position if you forget to place the gear selector in park.
Depending on the model,
If it uses a cable, it may be sticking or needs adjusting.
If it uses an electrical solenoid. may be blown fuse or park switch.
Tap, shake, and pull up on the shifter and make sure it's in park.

If the wrong key was inserted it may have bent a tumbler pin,maybe try some wd-40 or similar and work it with the right key,might drop the tumbler back,,if not the whole ign. cylinder will have to be changed

defective ignition switch tumbler

It sounds like the classic "switch needs replacing". You only need the tumbler replaced. Before installing the new tumbler take it and your door key to your local locksmith and they can key the new tumbler to work with the old key. This saves you from have to have two different keys.

If your key turns to the start position and won't start but will if clutched and you can't turn the key all the way back to get it out, then you need to have your floor shifter cable adjusted. The cable may even needs to be replaced. If your key looks good and not worn or you have tried a new key, you have a tumbler in the lock assembly sticking. You may try a very small amout of dry graphite to see if that will loosen the tumbler otherwise you will need someone see if new tumblers will fix the ignition lock or if you need a new ignition lock assembly. I would think it is most likely the cable though.