Buick 2000 Park Avenue Owner's Manual page 299

5. Reverse the above steps to reassemble the
lamp assembly.
When reassembling the lamp, make sure to align the
pin at the outboard edge of the headlamp assembly
to the plastic retainer at the outboard edge of
the vehicle.
Headlamp Aiming
The headlamp aiming device is under the hood, directly
behind the headlamps.
Your vehicle has a headlamp system equipped with
horizontal and vertical aim indicators. The aim has been
-
pre set at the factory and should need no further
adjustment. This is true even though your vertical and
horizontal aim indicators may not fall exactly on the
"0" (zero) marks on their scales.
6-37