Cadillac 2001 Catera Owner's Manual page 152

If you continue to drive with a loose fuel cap, the
diagnostic system in your vehicle can determine if the
fuel cap has been left off or improperly installed. A
loose or missing fuel cap will allow fuel to evaporate
into the atmosphere. If this happens, the CHECK
ENGINE light may come on. For more information, see
"Malfunction Indicator Lamp" earlier in this section.
Automatic Transmission Warning Light
(If Equipped)
Leveling Indicator Light
This light comes on briefly
when the ignition is turned
on. If the light remains on
or lights up while driving,
there may be a fault in the
automatic transmission.
Have your vehicle serviced.
This light comes on steady
when the rear load level in
your vehicle changes.
Do not drive your vehicle when this light is on.
The rear of your vehicle is too low and part of the
body or the rear axle may be damaged when driving
over bumpy roads. When the light goes out, leveling
is complete. This procedure is automatic
have to do anything.
If the light comes on flashing, there may be a problem
with the leveling system. You should reduce your
vehicle speed and have your vehicle serviced soon.
Brake Pad Wear Indicator Light
--
you don't
This light comes on when
the brake pads on your
vehicle have significantly
worn. The pads will have to
be replaced, so have your
vehicle serviced soon.
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