Where is the air exchange door on a 1989 Buick reatta?
You do not remove the pin. Remove the bolts holding the entire hinge from the door. You need a helper to do this, and will need help aligning the new door. Mark the location of the old hinge with a marker around the outer edge of the hinge and replace it as close as possible in the exact same location.
there is a handle on the outside of the door... if you pull on it and evaluate it long enough you will eventually open the door. if it don't work... then put a key into the little slot and turn it. then start over with the pulling and jerking on the handle. If you still have trouble.... call your mother