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Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/1/21
Driving and Operating
145
Caution (Continued)
in a fire. Do not engage the exhaust
brake while the engine is idling as this
may cause engine overheating.
Avoid Unnecessary Idling of the Diesel Engine
If the engine idles too long, the engine
coolant temperature will fall below the
operating range. Low engine operating
temperature causes several conditions that
are harmful to engine operation and life.
Incomplete combustion of fuel in an engine
that is not fully warmed-up causes crankcase
dilution and forms lacquer and gummy
deposits on valves, pistons, and rings. It also
causes rapid accumulation of sludge within
the engine.
Diesel Particulate Filter
The DPF purifies diesel exhaust gases of
particulate matter (PM). PM is filtered from
the exhaust gas and collected in the DPF.
When PM is collected to the predetermined
level by the engine control module, the DPF
automatically burns the PM in a process
called regeneration.
Regeneration may not be completed under
certain driving conditions. If this occurs, the
warning/indicator lights will provide
prompts to properly complete DPF
regeneration.
Follow the prompts carefully to keep the
DPF in good working order. Please refer to
the Cummins Owner's Manual for additional
details. See
Driver Information Center (DIC)
,
Recommended Fluids and Lubricants
, and
{
Warning
.
Exhaust parts and gases become very
hot when the DPF is being
regenerated. In order to avoid being
burned, do not touch the exhaust
parts or DPF or get too close to the
exhaust gases.
.
Do not leave the vehicle during the
regeneration.
.
Parking over flammable items could
allow them to touch hot exhaust parts
under your vehicle and cause them to
ignite. Do not park over papers, leaves,
grass or other things that can burn.
(Continued)
Warning (Continued)
.
Make sure there is no flammable
material (for example, grass, waste
paper, oil or old tires) on or near the
DPF or exhaust system.
This content is to restore the function of the
DPF and it is not a malfunction. However,
the check engine malfunction indicator light
may come on and the power output may be
limited if driving or power take-off (PTO)
operation is continued for a long time with
the DPF warning light on.
This is to prevent the DPF from being
damaged. When operating PTO during
parking, check to ensure that the DPF
warning light does not come on.
Do not modify the DPF or exhaust pipe.
Changing the alignment, length or diameter
of the exhaust pipe would adversely affect
the exhaust system's exhaust emission
reduction function. If any modification is
necessary to install a component to the rear
of the vehicle, consult your dealer.