Pontiac 2008 Grand Prix Owner's Manual page 326

A. High-Beam Headlamp
B. Low-Beam Headlamp
C. Sidemarker Lamp
5. Turn the bulb socket ring one-quarter of a turn
counterclockwise to remove it from the headlamp
assembly.
5-56
6. Pull the old bulb from the socket.
7. Place the new bulb into the socket.
8. Turn the bulb socket ring one-quarter turn clockwise
to reinstall it back into the headlamp assembly.
9. Carefully reinstall the headlamp assembly.
10. Push down on the metal retaining clip while pushing
rearward on the headlamp, making sure the
headlamp assembly is secure.
11. Reinstall the bolt and tighten to secure.