2003 Oldsmobile Alero Owner's Manual - Page 262

Headlamp Aiming 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: The vehicle must have all four tires on a perfectly level surface. If necessary, pads may be used on an uneven surface. Your vehicle has a headlamp system equipped with horizontal and vertical aim indicators. The aim has been pre-set at the factory and should need no further adjustment. This is true even fnough your vertieai and horizontal aim indicators may not fall exactly on the " 0 (zero) marks on their scales. The vehicle should not have any snow, ice or mud attached to it. The vehicle should be fully assembled and aii 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 Ibs. (75 kg) on the driver's seat. Close all doors. Tires should be properly inflated. Rock the vehicle to stabilize the suspension. If your vehicle is damaged in an accident, the headlamp aim may be affected. Aim adjustment may be necessary if it is difficult to see lane markers (for horizontal ~im), if ~ n ~ n m i drivers flash their hi9h beams at nr ns you (for vertical aim). If you believe your headlamps need to be re-aimed, we recommend that you take it to your dealer for service; however, it is possible for you to re-aim your headlamps as described in the following procedure. 5-47