Buick 2002 Park Avenue - Manual (Page 302)

6-38
When reassembling, 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.