Buick 2010 Lucerne - Manual (Page 351)

Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim of the headlamps have been preset at
the factory and should need no further adjustment.
However, if the vehicle is damaged in a crash, the aim
of the headlamps may be affected and adjustment may
be necessary.
If oncoming vehicles flash their high beams at you, this
may mean the vertical aim of your headlamps needs to
be adjusted.
It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be adjusted.
It is possible however, to re-aim the headlamps as
described.
The vehicle should:
. Be placed so the headlamps are 25 ft. (7.6 m) from
a light colored wall.
. Have all four tires on a level surface which is level
all the way to the wall.
. Be placed so it is perpendicular to the wall.
. Not have any snow, ice or mud on it.
. Be fully assembled and all other work stopped
while headlamp aiming is being performed.
. Be normally loaded with a full tank of fuel and one
person or 160 lbs (75 kg) sitting on the driver seat.
. Have all tires properly inflated.
. Have the spare tire is in its proper location in the
vehicle.
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