1999 Buick Park Avenue Owner's Manual - Page 297

yellowblue Front Turn Signal The front turn signal bulbs can be accessed by removing the headlamp assembly as described in the previous bulb replacement procedure. Once the headlamp assembly has been removed, reach down from the top of the vehicle and, while pressing the lock tab on the socket, turn the socket one-quarter of a turn and pull it out. 2. Turn the vertical aiming screw (C) until the level bubble (D) is lined up with zero. Remove the old bulb by pulling it straight out of the socket. Replace the bulb and turn the bulb assembly back into place. 6-39