GMC 2010 Yukon/Yukon XL Owner's Manual page 265

The oil pressure gauge 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 may vary with engine speed, outside
temperature and oil viscosity, but readings above the
low pressure zone indicate the normal operating range.
When the oil pressure reaches the low pressure zone,
the OIL PRESSURE LOW STOP ENGINE message
appears in the Driver Information Center (DIC). See DIC
Warnings and Messages on page 4 61 and Engine Oil
on page 6 18 for more information.
A reading in the low pressure zone may be caused
by a dangerously low oil level or some other problem
causing low oil pressure. Check the oil as soon as
possible.
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.
If the vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
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