well in my cutlass the glove compartment slides out, to reveal the fuse panel on the left there are these white plastic arms, with metal arms on them that go into these black boxes where the vacuum controls them, and the on on the very top, without the spring on it, i just unclip the plastic arm from the metal arm, and move it either up or down, and by doing that you can change air flow from window and feet, to the front vents