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Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
In Brief
27
Cleaning the DPF (Exhaust
Filter)
While the DPF cleaning is
automatically controlled by the
engine computer, the Driver
Information Center (DIC) may
display a message. The vehicle will
need to operate continuously until
the message is no longer displayed.
Cleaning occurs above
50 km/h (30 mph). If the vehicle is
returned to idle during the cleaning
process, the driver may notice a
slightly different sound or a slightly
elevated engine idle speed. This is
normal. No action is required on the
part of the driver during a regular
DPF cleaning. See
Special DPF Driver Messages
If the vehicle is used for numerous
short trips or extended slow-speed
operation, the engine computer may
not be able to adequately heat up
the exhaust system to clean the
DPF effectively. The engine
computer has been designed to
continuously monitor the condition
of the DPF. When the engine
computer detects that the DPF is
nearly full of particulates and that
the vehicle is not being operated in
a manner that would allow effective
automatic DPF cleaning, the DIC
will display a message.
If the vehicle continues to be driven
in a manner that prevents effective
DPF cleaning, the DPF will become
plugged with particulates. If this
occurs, the engine computer will
turn on the malfunction indicator
lamp (Check Engine Light) in the
instrument cluster, and the DIC will
display the message ENGINE
POWER IS REDUCED. See
.
Fuel
Use Ultra Low Sulfur Diesel
Fuel (ULSD)
Use ULSD only. The emission
control hardware used on the
vehicle may be damaged by using
fuel with high sulfur levels. Use only
fuel that is dispensed from pumps
bearing the ULSD label.
Do Not Use Low Sulfur Diesel
Fuel (LSD)
Do not use fuel that is dispensed
from pumps bearing the LSD label.
Do Not Use Non-Highway Fuel
Fuel labeled as off road or
non-highway is typically very high in
sulfur content and will damage the
emission control system.
Non-highway fuel is not intended for
use in on-highway vehicles and
does not have the fuel properties
needed by the DPF-equipped
Duramax diesel.
In addition:
.
Use the correct engine oil.
.
Do not add gasoline to
diesel fuel.
.
Do not modify the induction or
exhaust systems.
See
and