Running The Vehicle While Parked; Diesel Particulate Filter - Chevrolet Silverado 4500HD 2022 Owner's Manual

206 Driving and Operating
Warning (Continued)
Always start and operate the engine
in a well-ventilated area.
If in an enclosed area, vent the
exhaust to the outside.
Do not modify or tamper with the
exhaust system.
Do not idle the engine except as
necessary. For more information go to
www.P65warnings.ca.gov/diesel.
See Battery - North America 0 287, Jump
Starting - North America 0 316, and the back
cover.

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
0 203 and
Engine Exhaust 0 205.
If parking on a hill and pulling a trailer, see
Driving Characteristics and Towing Tips
0 233.

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.
Caution
Damage can occur to the DPF
components if the required Ultra Low
Sulfur Diesel (15 ppm sulfur maximum)
Caution (Continued)
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.
During DPF self-cleaning or during
extended idling in P (Park), the exhaust
system and exhaust gases are very hot.
Things that burn could touch hot exhaust
parts under the vehicle and ignite. You or
others could be burned. Do not park,
or idle for an extended period of time,
near or over papers, leaves, dry grass,
or other things that can burn. Keep the
exhaust area clear of material that could
ignite or burn. See Parking over Things
(Continued)
That Burn 0 205.
Warning