Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336155) - 2020 - CRC - 5/6/19
54
Driving and Operating
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
+RES on the cruise control 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
*
on the cruise control.
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
+RES on the cruise control 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 Remote PTO Engine
Start/Shutdown switch. Load
relay disengages and the engine
will stop.
.
If equipped, press the PTO
Emergency Stop switch. Load
relay disengages and the engine
will stop. Refer to the bulletins in
the GM Upfitter Integration
website www.gmupfitter.com for
the Power Take-Off (PTO)
operating description and
application guide.
.
With the key in the ignition and
rotated to the RUN position,
press the brake pedal. The PTO
load relay disengages and the
engine returns to base idle
speed. The operator may drive
the vehicle.
Stationary Modes will also
disengage if:
.
Vehicle movement is detected.
.
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
www.gmupfitter.com.
.
Cruise control becomes enabled.
.
Timed auto-engine shutdown:
This feature will shut down the
engine automatically after a