My car takes about 3 minutes before it shifts out of park. on 1999 Buick Regal

It has to run a few minutes before it shifts.

Asked by for the 1999 Buick Regal
2 answers
Is the transmission not shifting or can you not get it out of park?
Transmission service? How many miles on it with no transmission service. Low on fluid. Fluid color dirty? Filter maybe restricted. Have Tech check it.