WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS COMPANY
Park Pawl Actuator Guide Removal
Callout
Component Name
1
Park Pawl Actuator Guide Pin
NOTE:
Use side cutter to remove the pin (1) and discard.