Somebody tried to fix my tumbler and my car will 2002 cavalier

The shifter release solenoid is activated by the brake light switch. Check to see if the brake lights are working when you press the brake pedal. If not, that may be the reason why the shifter won't come out of park. You may need to replace or adjust the brake light switch. (It's located at the top of the brake pedal arm).

Which engine do you have?

I would say the switch and not the lock cylinder. The switch should have a spring to return the lock back to on.

I think you are going to have to change the lock cylinder and tumbler and put original one in from the car, so computer recognizes it and allows it to start.

Ignition switch located half way down steering column.
Ignition tumbler (Where you insert the key) Need to remove steering wheel, if tilt steering need remove c clip, then there is a hex bolt securing the tumbler.
Ignition switch is a bit more involved. hope this helps, James Booth

i would disconnect the ground battery cable for about 1 minute and then reconnect it, then try and start the car, hopefully the light will have went out. and hopefully car starts.

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.

sounds like the ignition itself is worn,go get one from a scrap yard and replace it

replace the key and tumbler assembly