Buick 2010 Lacrosse Owner's Manual page 112

Do not keep driving if the oil
pressure is low. The engine can
become so hot that it catches fire.
Someone could be burned. Check
the oil as soon as possible and
have the vehicle serviced.
The oil pressure light should come
on briefly as the engine is started.
If it does not come on have the
vehicle serviced by your dealer/
retailer.
If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle
could be low on oil and might have
some other system problem. See
your dealer/retailer.
For vehicles with the uplevel cluster
this telltale displays in the Driver
Information Center (DIC) screen.
This light, below the fuel gauge,
comes on briefly when the engine is
started.
If it does not come on have
the vehicle serviced by your
dealer/retailer. If the system is
working normally the indicator light
then goes off.
This light also comes on when the
fuel tank is low on fuel. When fuel is
added the light should go off. If it
does not, have your vehicle
serviced.
For vehicles with the uplevel cluster,
this telltale displays in the Driver
Information Center (DIC) screen.