Buick 2010 Lacrosse Owner's Manual page 113

This light flashes when the security
system is activated.
For more information, see
.
For vehicles with the uplevel cluster
this telltale displays in the Driver
Information Center (DIC) screen.
This light comes on when the
high-beam headlamps are in use.
See
information.
For vehicles with fog lamps, this
light comes on when the fog lamps
are on.
The light goes out when the fog
lamps are turned off. See
information.
for more
This light comes on when the
taillamps are in use.
for more