Shifter won't move out of park

The thing that locks the shifter in park is the shift interlock solenoid. A lot of times a wire breaks off. Also the brake light switch would need to be checked as that is part of the interlock system.

It want move at all out of park

No but the gear shift moves freely

Hi, I have a 1998 Cadillac DeVille, there is a display that reads thief system detection, car may not restart. Now it will not go into gear! Can you please give me any information on this I just replaced the body control modular. Thank you!