GMC 2.8L Duramax Diesel 2020 Manual page 64

Exhaust Filter Cleaning
Available Go to Options Menu
(DPF only)
In addition, the PTO indicator light
will light when all conditions
required to engage PTO have not
been met. When enabling PTO, the
PTO indicator light will turn on, then
turn off after one second. Under
normal operating conditions, the
PTO indicator light will remain on
throughout the PTO operating cycle.
Additional in-vehicle PTO module
information can be accessed by the
service technician to aid in
troubleshooting. Also see the
service manual for more
information.
The GM service technician can
access Service Tool information that
will contain reasons why PTO may
not engage and why PTO may
unexpectedly disengage due to
system conditions.
See www.gmupfitter.com for
information on the installation of
wiring and programming for PTO
aftermarket equipment.
Diesel Particulate Filter
Cleaning during PTO
Operation
This feature is only available on
Fleet and Commercial vehicles. To
verify that the vehicle has this
feature, see www.gmupfitter.com to
contact the GM Upfitter Integration
Group for assistance.
If equipped, this feature allows for
manual cleaning/regeneration of the
Diesel Particulate Filter (DPF) when
it is unable to clean itself. It may be
necessary to perform a manual
regeneration if driving conditions
such as extended slow speed,
stop-and-go traffic, extended idles,
short drive cycles, or stationary PTO
operation prevent DPF
self-cleaning.
Manual regeneration can only be
used when the DPF has become at
least 90% full. At 100% full, it will
attempt to automatically self-clean if
proper driving conditions are met.
The DPF will clean itself if the
Driving and Operating
vehicle can be driven above
50 km/h (30 mph) for about
30 minutes.
Manual regeneration can be used
during a stationary PTO session.
However it is strongly recommended
that the exhaust filter be cleaned
before continuous PTO. If manual
regeneration is operating
concurrently with PTO then the PTO
system will retain control of the
engine speed. Low PTO engine
speeds will cause regeneration to
take longer. To initiate a manual
DPF regeneration, see Manual
Regeneration of Diesel Particulate
Filter in Diesel Particulate Filter
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