2001 Cadillac Seville Owner's Manual - Page 321

Headlamp Aiming 7. After removing the wiring harness connector from the headlamp bulb socket, replace the bulb assembly. Reconnect it to the wiring harness and reinstall the headlamp bulb assembly back into the headlamp housing. 8. After reinstalling the bulb and socket, reinstall the rubber cover. Make sure it fully covers the headlamp socket. 9. To replace the high-beam bulb, turn the bulb socket counterclockwise to unlock the socket from the lamp housing. Follow the instructions in Step 6 through 8 to install the new bulb. Your vehicle has a visual optical headlamp aiming system equipped with horizontal aim indicators. The aim has been pre-set at the factory and should need no further adjustment. This is true even though your horizontal aim indicators may not fall exactly on the "0" (zero) marks on their scales. 6-39