2010 GMC Yukon Owner's Manual - Page 40

Engine Coolant Temperature Gage Oil Pressure Gage United States Canada United States Canada This gage shows the engine coolant temperature. It also provides an indicator of how hard the vehicle is working. During a majority of the operation, the gage reads 210° F (100° C) or less. If a load is being pulled or going up hills, it is normal for the temperature to fluctuate and go over the 235° F (113° C) mark. However, if the gage reaches the 260° F (125° C) mark, it indicates that the cooling system is working beyond its capacity. The oil pressure gage 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 should be 29 to 80 psi (200 to 550 kPa). In certain situations, such as long extended idles on hot days, it could read as low as 15 psi (105 kPa) and still be considered normal. 4-8