GMC Sierra Hybrid 2011 Owner's Manual page 26

5-6 Instruments and Controls
Oil pressure should be 200 to
550 kPa (29 to 80 psi). In certain
situations, such as long extended
idles on hot days, it could read as
low as 105 kPa (15 psi) and still be
considered normal.
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.
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.
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 for changing engine oil.
AUTO STOP
When the engine goes into
Automatic Engine Stop, the oil
pressure gauge drops to zero when
the tachometer is at the AUTO
STOP position. This is normal and
oil pressure returns to the normal
operating range once the engine
starts.
See Starting the Vehicle on
page 9 2 for more information.
AUTO STOP displays in the Driver
Information Center (DIC) when the
vehicle speed is zero. See Driver
Information Center (DIC) on
page 5 11 for more information.