Cadillac 2005 DeVille Owner's Manual page 178

CHECK GAS CAP – 61: This message will appear if
the gas cap has not been fully tightened. You should
recheck your gas cap to ensure that it is on properly.
CHECK OIL LEVEL – 36: For correct operation of the
low oil sensing system, your vehicle should be on a
level surface. A false CHECK OIL LEVEL message may
appear if the vehicle is parked on a grade. The oil
level sensing system does not check for actual oil level
if the engine has been off for a short period of time,
and the oil level is never checked while the engine is
running. If the CHECK OIL LEVEL message appears,
and your vehicle has been parked on level ground
with the engine off for at least 30 minutes, the oil level
should be checked by observing the oil dipstick. Prior to
checking the oil level, be sure the engine has been
off for a few minutes and your vehicle is on a level
surface. Then check the dipstick and add oil if
necessary. See Engine Oil on page 5-14.
CHECK TIRE PRESSURE – 144: This message is
displayed when the Tire Pressure Monitor (TPM) system
detects a low or high tire pressure condition in one or
more of the road tires.
3-62
By pressing the INFO button up or down, the DIC
display will show which tire or tires do not have the
correct inflation pressure. The system will display the air
pressure, the tire location (LF, RF, RR or LR), and
LOW TIRE if the air pressure is low or HIGH TIRE if the
air pressure is high. The tire pressure information is
available in English or metric measurements. For
example, a driver's side front tire that is low may be
shown as: 22 PSI LF TIRE LOW.
The correct tire inflation pressure should be set to those
shown on the Tire and Loading Information label. See
Loading Your Vehicle on page 4-30 for the location
of this label. For more information regarding proper tire
inflation, see Inflation - Tire Pressure on page 5-65.
If a tire is low, you should stop as soon as possible and
inspect your tire(s) for damage. If a tire is flat, see If
a Tire Goes Flat on page 5-76.
Once the TPM system detects the low or high tire
pressure condition, the message CHECK TIRE
PRESSURE will be displayed whenever you start the
engine. To remove or clear the CHECK TIRE
PRESSURE message, you will need to set the tire(s) to
the proper tire pressure. See Inflation - Tire Pressure
on page 5-65. See Tire Pressure Monitor Operation on
page 5-68 for more information.