Steering Column not locking on 2004 Buick Park Avenue

My mother purchased a 2004 Buick Park Ave.
Here is what is happening.
If the Tilt steering is all the way up, key is out, you cannot move the column shifter. I figure this is normal for locking the steering.

NOW if I drop the Tilt steering down, with the key not in, I am able move the Column shift to neutral or where ever I want and the car will start rolling down or up hill if the emergency brake is on.

Is there some type of sensor that controls this?

1 answer
This is a mechanical steering column issue that I would have inspected ASAP, because it is a safety issue.