Glove Box on 1991 Cadillac Seville

Help! How do you open the "glove box"? Is it part of the "dash board"? The key goes into the lock but I can't figure out what to do next!

Asked by for the 1991 Cadillac Seville
To unlock the glove box door, insert the oval key into the cylinder and turn it to the Left. An additional quarter turn will open the door.
1 more answer
The key may be the "valet key", which is only for opening the door and starting the vehicle, it wont work in the glove box or the trunk. Try it in the trunk, if it works, then you may have a bad key or glove box lock.