Possible issues can be: 1)Brake light switch, if not working properly,
this will prevent you from being able to take vehicle out of park.
2)Neutral safety switch, which is an electrical component that relays
information to the transmission designating which gear to be in. A
malfunction here can also cause you to be stuck in park.3)
Worn/faulty shift cable, which is attached to the transmission and
switched which gear you have selected. A bad cable can get bound up
and not allow you to move vehicle out of park. Those are just some
things that you can look into.