2001 Cadillac DeVille Owner's Manual - Page 171

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" in the Index. 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. By pressing the INFO button up or down the DIC display will show which tire or tires do not have the correct inflation pressure. A "LOW TIRE" condition exists when the tire's air pressure is under 24 psi (165 kPa) and a "HIGH TIRE" condition exists when the tire's air pressure is above 36 psi (248 kPa). The system will display the air pressure, the tire location (LF, RF, RR or LR) and if the air pressure is low or 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 Loading-Information Label, located on the rear edge of the driver's door. For more information regarding proper tire inflation, see "Inflation -- Tire Pressure" in the Index. 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 is Flat" in the Index. 2-101