Shifter
If you are speaking about the shift trigger that you squeeze to release from park, then I have removed and replaced it. It is retained by the shift **** top gray plastic cap and it will depress a rod that goes down through the shifter shaft to engage and disengage the parking switch within the shift body. Depressing this internal switch tells the system that the car is in park.
If you need to replace the trigger assembly or the top gray retainer, they are only available by purchasing the entire shift ****.
Hope this helps and if not, please provide more detail as to why you ask the question and what problem you are attempting to resolve.
Good luck...GD









