GMC duramax diesel 2016 Supplement Manual page 78

PTO System Disengage
Conditions
Preset or Variable Stationary
Modes In-Cab Operation
To disengage PTO, do one of the
following:
Press the brake pedal. The
engine returns to base idle, but
the PTO load relay remains
engaged. The PTO indicator
light will blink slowly indicating
that a PTO set speed is still
stored in memory. Upon
releasing the brake, the factory
default programming is for the
engine speed to remain at curb
idle. A press and release of the
cruise control +/RES button will
restore engine rpm to the last
PTO set speed. The PTO
system can also be programmed
to return engine rpm to the PTO
Standby Speed setting.
Press the cruise control Cancel
button. The engine returns to
base idle, but the PTO load relay
remains engaged. The PTO
indicator light will blink slowly
indicating that a PTO set speed
is still stored in memory.
Activating the cruise control
+/RES button will restore engine
rpm to the last PTO set speed.
Press and release the PTO
In-cab switch. The PTO load
relay disengages and the engine
returns to base idle. The PTO
indicator light will turn off,
indicating the PTO load relay is
disengaged and the stored set
speed has been cleared from
memory.
Stationary Modes (Preset or
Variable) Remote Control
To disengage PTO:
Open the PTO Remote Engine
Start/Shutdown switch. Load
relay disengages and the engine
will stop.
If equipped, press the PTO
Emergency Stop Switch. See
www.gmupfitter.com. Load relay
disengages and the engine
will stop.
Stationary Modes will also
disengage if:
Vehicle movement is detected.
Driving and Operating
The parking brake is released.
The transmission is shifted out
of P (Park).
The ignition is cycled from RUN
to OFF.
The PTO feedback signal is lost
indicating the load is disengaged
if used. See the Upfitter
Reference Document.
Cruise control becomes enabled.
Timed auto-engine shutdown:
This feature will 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 or PTO system
fault conditions: This feature will
shut down the engine when PTO
is operating if a critical engine
condition such as low oil, low oil
pressure, hot engine, hot
transmission, low fuel, or diesel
particulate filter regeneration is
detected by the vehicle system.
If PTO operation is continued
when critical engine conditions
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