2008 Buick LaCrosse Owner's Manual - Page 326

Headlamp Aiming The vehicle has a visual optical headlamp aiming system. The aim has been preset at the factory and should need no further adjustment However, if the vehicle is damaged in a crash, the headlamp aim may be affected and adjustment may be necessary. If oncoming vehicles flash their high beams at you, this may also mean the vertical aim needs to be adjusted. It is recommended that the vehicle is taken to your dealer/retailer for service if the headlamps need to be re-aimed. 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 perfectly 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 done. • Be normally loaded with a full tank of fuel and one person or 160 lbs (75 kg) on the driver seat. • Have all tires properly inflated. Headlamp aiming is done with the vehicle's low-beam headlamps. The high-beam headlamps will be correctly aimed if the low-beam headlamps are aimed properly. Locate the vertical headlamp aiming screws under the hood near the headlamps. The adjustment screw can be turned with a 6 mm male hex. 5-56