Buick 2010 Lacrosse Owner's Manual page 320

To replace one of these bulbs:
1. Locate the bulb assembly under
the front facia.
2. Disconnect the bulb socket from
the electrical connector and pull
out the bulb assembly.
3. Remove the old bulb from the
bulb socket and push the new
bulb straight into the bulb socket
until it connects.
4. Push the bulb socket into the
bulb assembly to lock it into
place.
5. Reconnect the bulb socket to the
electrical connector.
A. Turn Signal Lamp
B. Back Up Lamp
To replace one of these lamps:
1. Open the trunk. See
.
2. Pull back the trunk trim.