1997 GMC Sonoma Owner's Manual - Page 110

Engine Oil Pressure Gage 1 0 OIL The oil pressure gage shows the engine oilpressure in psi (pounds per square inch) when the engine is running. WTION: Don't keep drivingif the oil pressure is low. If you do, your engine can become hot that it so be catches fire.You or others could burned. Check your oil as soon as possible and have your vehicle serviced. u 80 Canadian vehicles indicate oil 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. I NOTICE: Damage to your engine from neglected oil problems can be costly and is not coveredby your warranty. A reading in the low pressure zone may be caused by a dangerously low oil level or otherproblems causing low oil pressure. 2-62