Cadillac 2004 DeVille - Manual (Page 182)

This light tells you if there
could be a problem with
your engine oil pressure.
The light goes on when you turn your key to ON or
START. It goes off once you start your engine. That is a
check to be sure the light works. If it does not come
on, be sure to have it fixed so it will be there to warn you
if something goes wrong.
When the light comes on and stays on, it means that oil
is not flowing through your engine properly. You
could be low on oil and you might have some other
system problem.
Security Light
For information regarding
this light, see
Theft-Deterrent Systems
on page 2-20.
Fog Lamp Light
This light will come on
when the fog lamps are in
use. It will go out when the
fog lamps are turned off.
For more information about the fog lamps, see “Fog
Lamps” under Exterior Lamps on page 3-16.
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