2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 269

Oil Pressure Gauge A reading outside the normal operating range can be caused by a dangerously low oil level or some other problem causing low oil pressure. Check the vehicle's oil as soon as possible. See "OIL PRESSURE LOW" under DIC Warnings and Messages on page 4‑66 and Engine Oil on page 6‑17. { WARNING: Do not keep driving if the oil pressure is low. The engine can become so hot that it catches fire. Someone could be burned. Check the oil as soon as possible and have the vehicle serviced. Notice: Lack of proper engine oil maintenance can damage the engine. The repairs would not be covered by the vehicle warranty. Always follow the maintenance schedule in this manual for changing engine oil. United States Canada For vehicles with an engine oil pressure gauge, it shows the engine oil pressure in psi (pounds per square inch) when the engine is running. Canadian vehicles indicate pressure in kPa (kilopascals). Oil pressure can vary with engine speed, outside temperature and oil viscosity, but if readings are outside the normal operating range, the oil pressure light comes on. See Oil Pressure Light on page 4‑46 for more information. 4-45