Buick 2005 Park Avenue - Manual (Page 278)

To check the aim, the vehicle should be properly
prepared as follows:
• The vehicle must have all four tires on a perfectly
level surface.
• If necessary, pads may be used on an
uneven surface.
• The vehicle should not have any snow, ice or mud
attached to it.
• The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.
• There should not be any cargo or loading of the
vehicle, except it should have a full tank of fuel and
one person or 160 lbs (75 kg) on the driver’s seat.
• Close all doors.
• Tires should be properly inflated.
• Rock the vehicle to stabilize the suspension.
Start with the horizontal aim. The adjustment
screws can be turned with an E8 Torx
® socket or
T15 Torx ® screwdriver.
Once the horizontal aim is adjusted, then adjust the
vertical aim.
1. Turn the horizontal
aiming screw (A) until
the indicator (B) is
lined up with zero.
2. Turn the vertical aiming screw (C) until the level
bubble (D) is lined up with zero.
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