GMC Duramax Diesel 2015 Owner's Manual page 76

Remote Engine Shutdown
Control
The vehicle s PTO system allows for
remote engine shutdown while
operating in the stationary PTO
mode. This feature has the following
functions:
Engine shutdown using the
operator remote switch: The
vehicle wiring system provides
remote engine shutdown switch
connections, which are
accessed through the PTO
upfitter connector.
Timed auto-engine shutdown:
The timed auto-engine shutdown
feature provides the means to
shut down the engine
automatically after a predefined
time. PTO must be operational
for this function to be active.
Engine shutdown based on
critical engine conditions: The
engine will be shut down when
PTO is operating if a critical
engine condition is detected by
the vehicle system (i.e., low oil,
low oil pressure, hot engine, hot
transmission, low fuel, diesel
particulate filter regeneration).
If PTO operation is continued
when critical engine conditions
are present, a horn chirp
warning will occur after two to
five minutes. The engine will be
shut down two minutes after the
horn warning. The operator can
re-start the engine with the
ignition key. The above horn
warning and engine shutdown
will again occur if the critical
engine condition is still present.
Prolonged or Extended PTO
Operation
While operating the vehicle in
stationary PTO mode, the Diesel
Particulate Filter (DPF) will continue
to filter the exhaust and accumulate
soot. The engine control system,
depending on the speed and load
being applied by the PTO, may not
Driving and Operating
be able to generate enough energy
or adequate heat needed to clean or
regenerate the DPF. Continued
operation under conditions that do
not allow effective regeneration or
cleaning will eventually plug the
DPF and result in reduced power.
The ENGINE POWER IS
REDUCED Driver Information
Center (DIC) message and
malfunction indicator lamp will be
displayed, and dealer service will be
required to return the vehicle to
normal, full power operation. To
prevent this from occurring,
frequently monitor the vehicle during
PTO operation. If the DIC message
is displayed during PTO operation,
see Diesel Particulate Filter on
page 9-12 for information on how to
clean or regenerate the DPF. Also
see Remote Engine Shutdown
Control earlier in this section.
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