2000 Buick Century Owner's Manual - Page 275

NOTICE: To make sure your headlamps are aimed properly, read all the instructions before beginning. Failure to follow these instructions could cause damage to headlamp parts. To check the aim, the vehicle should be properly prepared as follows: D The vehicle must have all four tires on a perfectly level surface. D If necessary, pads may be used on an uneven surface. D The vehicle should not have any snow, ice or mud attached to it. D The vehicle should be fully assembled and all other work stopped while headlamp aiming is being done. D 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. D Close all doors. D Tires should be properly inflated. D Rock the vehicle to stabilize the suspension. Driver's Side Headlamp Shown A. Vertical aim adjustment screw B. Horizontal aim adjustment screw Open the hood and locate the vertical and horizontal aim indicators. The aiming screw for the vertical aim indicator (A) is at the center of the headlamp cover and the aiming screw for the horizontal aim indicator is on the outboard side of the headlamp cover (B). 6-33