Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336155) - 2020 - CRC - 5/6/19
Driving and Operating
55
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
are present, a horn chirp
warning will occur after 30
–
60 seconds. The engine will shut
down two minutes after the horn
warning. The engine can be
restarted with the ignition key or
with the Remote PTO engine
start controls. The horn warning
and engine shutdown will again
occur if the critical engine
condition is still present.
Resume memory speed is cleared
for the above actions.
When Remote PTO engine starting
has been initialized with the ignition
key in the RUN position, the shift
lever will remain locked if the brake
pedal is pressed and a shift from
P (Park) is attempted while the
engine is running and PTO is active
(standby mode). A shift out of
P (Park) will not be allowed until one
of the following actions is taken by
the vehicle operator:
.
Press the Remote PTO Engine
Start/Shutdown switch.
.
Press the PTO in-cab switch
(only if the PTO in-cab Remote
Start/Stop feature is enabled).
This requires programming with
the GM Service Tool.
.
Press
5
on the cruise control.
.
Release the parking brake.
Mobile Mode
To disengage PTO:
.
Press the brake pedal. The PTO
system releases control of
engine speed, but the PTO load
relay remains engaged. The
engine will return to base idle
unless the accelerator pedal is
pressed. 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 awaiting an input from +RES
on the cruise control to restore
engine rpm to the last PTO set
speed. The 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. Pressing
+RES on the cruise control will
restore engine rpm to the last
PTO set speed.
.
Press the PTO in-cab switch.
Load relay disengages and the
engine returns to base idle. The