GMC duramax diesel 2016 Supplement Manual page 79

78 Driving and Operating
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 PTO remote 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 PTO remote 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
(stand-by 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 PTO Remote Engine
Start/Shutdown switch.
Press the cruise control On
button.
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 the
cruise control +/RES button 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 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.
Pressing the cruise control
+/RES button 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
PTO telltale will turn off,
indicating the PTO load relay is
disengaged and the stored set
speed has been cleared from
memory.
Mobile Mode will also
disengage if:
If PTO feedback input is lost, the
engine speed is returned to the
PTO Standby speed setting and
the load is still engaged.
Vehicle Speed exceeds Max
Vehicle Speed. Factory default
setting = 93 km/h (58 mph).
Engine Speed exceeds Max
Engine Speed for more than
15 seconds. Factory default
setting = 2100 rpm.
The cruise control On/Off button
is on.