2003 Chevrolet Astro Owner's Manual - Page 159

Oil Pressure Gage The oil pressure gage shows the engine oil pressure in psi (pounds per square inch) when the engine is running. A reading in the low pressure zone may be caused by a dangerously low oil level or other problemscausing low oil pressure. Don't keep driving if the oil pressure is low. If you do, your engine can becomeso hot that it catches fire. You or others could be burned. Check your oil as soon possible and have as your vehicle serviced. Canadian vehicles indicate pressure in kPa (kilopascals). Oil pressure may vary with engine speed, outside temperature and oil viscosity, but readings above the low pressure zone indicate the normal operating range. Notice: Damage to your engine from neglected oil problems can be costly and not covered is by your warranty. 3-34