How do you replace the door hinge pins on a 1987 Buick Regal?

To replace the door hinge pins on a 1987 Buick Regal, first, support the door to prevent it from falling. Remove the door panel if necessary for better access. Use a hammer and a punch to drive out the old hinge pins from the hinges, then insert the new pins and secure them in place. Finally, reattach the door panel if it was removed and test the door for proper alignment and movement.