If you believe your headlamps need horizontal (left/right) adjustment, follow the horizontal aiming procedure. If you believe your headlamps need only vertical (up/down) adjustment, follow only the vertical aiming procedure.

Adjustment screws can be turned with an E8 TorxR socket or T15 Torx screwdriver.

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Headlamp Horizontal Aiming

Turn the horizontal aiming screw (A) until the indicator

(B) is lined up with zero.

Once the horizontal aim is adjusted, then adjust the vertical aim.

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Buick 2000 manual Headlamp Horizontal Aiming