Running The Vehicle While; Parked; Diesel Particulate Filter - GMC CHEVROLET Silverado 6500HD 2019 Owner's Manual

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Running the Vehicle
While Parked
It is better not to park with the
engine running.
If the vehicle is left with the engine
running, follow the proper steps to
be sure the vehicle will not move.
See Shifting Into Park 0 214 and
Engine Exhaust 0 216.
If parking on a hill and pulling a
trailer, see Driving Characteristics
and Towing Tips 0 250.
Diesel Particulate
Filter
The vehicle has a Diesel Particulate
Filter (DPF) as part of the exhaust
system to reduce vehicle emissions.
The DPF requires a unique exhaust
tailpipe with an exhaust cooler. The
exhaust cooler mixes air with the
exhaust to lower the temperature
before it leaves the tailpipe.
The DPF, the tailpipe, or other
exhaust system components must
not be altered. Inspect regularly and
clean any mud or dirt from the
exhaust cooler, especially where the
exhaust cooler connects to the
tailpipe and the openings where
fresh air enters the cooler.
The DPF will clean itself as part of
normal operation. Several factors
including fuel consumed, hours of
engine operation, and miles driven
are monitored by the Engine Control
Module (ECM). The self-cleaning
occurs approximately once per tank
of fuel.
Driving and Operating
Caution
Damage can occur to the DPF
components if the required Ultra
Low Sulfur Diesel (15 ppm sulfur
maximum) fuel and either CJ-4 or
CK-4 engine oil are not used.
This damage would not be
covered by the vehicle warranty.
Under certain driving conditions,
such as stop-and-go traffic, the filter
cannot clean itself. A message
comes on when the DPF is dirty and
needs to perform a self cleaning.
For the filter to clean itself, the
vehicle must be driven above
50 km/h (30 mph) until the message
goes off. This will take about
30 minutes.
Warning
During DPF self cleaning or
during extended idling in P (Park),
the exhaust system and exhaust
217
(Continued)

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