from what I can remember, that actual mirror glass is snapped onto the motor, so it should be removable just by popping it off. I might be wrong so someone plz correct me if I'm wrong before you go pulling on it. If the mirror doesn't move it could be the motor is bad. Does the motor in that particular mirror make any noise when you try to adjust it? Sometimes my passenger mirror will stick when I try to move it, but I can hear the motor trying to work. Usually this only happens when it's extremely cold though, like now. After a few attempts, it breaks free and moves about like normal.