1. Park your Acadia on a level surface and turn off the engine.
2. Open the hood and remove the four bolts that secure the upper part of the bumper cover to the radiator support.
3. Now you need to remove the four screws that secure the lower part of the bumper cover to the fender liner.
4. Disconnect the fog light harnesses, if equipped.
6. Carefully pull the bumper cover straight off the vehicle, being careful not to damage any of the clips or tabs.
7. Once the bumper cover is removed, you will see the headlight assemblies. There are two screws on each headlight assembly that you will need to loosen. Use a Phillips head screwdriver to loosen the screws.
8. Once the screws are loosened, you can adjust the headlights by turning them clockwise or counterclockwise.
9. Once the headlights are adjusted to the desired position, tighten the screws.
10. Reinstall the bumper cover by reversing the steps that you took to remove it.
That's it! You have now successfully adjusted the headlights on your 2007 Acadia.