Pontiac 2002 Bonneville Owner's Manual page 332

2. Lift the tabs to remove the bulb from the assembly.
3. Replace the bulb. Push the bulb assembly in and turn
it clockwise to install the bulb assembly into the
headlamp assembly.
Headlamp Aiming
Your vehicle has a visual optical headlamp aiming
system equipped with horizontal aim indicators. The
aim has been preset at the factory and should need no
further adjustment. This is true even though your
horizontal aim indicators may not fall exactly on the
"0" (zero) marks on their scales.
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