Technical data

Black plate (8,1)
Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U.S./Canada-
7132827) - 2015 - CRC - 10/21/14
5-8 Instruments and Controls
English Van Models
{
Caution
Lack of proper engine oil
maintenance can damage the
engine. Driving with the engine
oil low can also damage the
engine. The repairs would not be
covered by the vehicle warranty.
Check the oil level as soon as
possible. Add oil if required, but if
the oil level is within the operating
range and the oil pressure is still
(Continued)
Caution (Continued)
low, have the vehicle serviced.
Always follow the maintenance
schedule for changing engine oil.
The engine oil pressure gauge
reads in kPa (kilopascals) or psi
(pounds per square inch) when the
engine is running. Oil pressure may
vary with engine speed, outside
temperature, and oil viscosity.
If readings are outside the normal
operating range, the low oil
pressure message may display on
the Driver Information Center (DIC),
or for vehicles without DIC the oil
pressure light will come on. If the oil
pressure message or light comes
on, check the oil level immediately.
Do not operate the engine with the
oil pressure warning light on or an
ENGINE OIL LOW ADD OIL
message displayed.
Malfunction
Indicator Lamp
A computer system called OBD II
(On-Board Diagnostics-Second
Generation) monitors the operation
of the vehicle to ensure emissions
are at acceptable levels, helping to
maintain a clean environment. The
malfunction indicator lamp comes
on when the vehicle is placed in
ON/RUN as a check to show it is
working. If it does not, have the
vehicle serviced by your dealer. See
“Ignition Positions” in the owner
manual.
If the malfunction indicator lamp
comes on while the engine is
running, this indicates that there is
an OBD II problem and diagnosis
and service might be required.