Chevrolet GMC Duramax 2023 Manual page 32

Warning
If the key is in the ignition (Key Access)
or the RKE transmitter is in the vehicle
(Keyless Access) during Remote PTO
operation, the vehicle can be shifted out
of P (Park). Even though PTO will be
disengaged, depending on PTO Upfitter
application, personal injury or property
damage may result from vehicle
movement. Always remove the key from
the ignition or the RKE transmitter from
the vehicle before operating Remote PTO,
unless the Remote Operation In-Cab
Enable feature is used.
Primary PTO Operating Modes
PTO modes of operation are:
Preset
Stationary operation only: In-cab control
is standard, remote control is available.
Preset speed control is standard.
Variable
Available in in-cab control and in remote
control.
Mobile
In-cab control only. Variable speed control
only available.
Operator Selectable In-Cab Mode (OSIM)
In-cab operation only.
OSIM is for vehicles that require both
stationary and mobile modes. OSIM is
available via the GM Service Tool only.
During the configuration of OSIM, two
modes must be paired: stationary preset
and mobile, or stationary variable and
mobile. During activation of OSIM, one of
the two modes within the pre-configured
pairing must be selected. If an OSIM
mode is not selected, PTO will not
operate.
OSIM modes of operation are:
Stationary
The configuration may be stationary
preset or stationary variable.
Mobile
The configuration is variable only.
Selection between OSIM pairings is not
available.
Remote modes are not available.
The factory default programming enables
in-cab control. For stationary modes, the GM
Service Tool can reprogram the system to
allow for remote control and disable the
in-cab control.
Driving and Operating
All PTO modes provide for engine rpm
control and PTO clutch control.
All PTO modes provide for safety interlocks
for PTO load disengagement.
Remote PTO modes provide for remote
engine starting and shutdown.
Stationary in-cab and Remote PTO modes
provide for engine shutdown due to critical
engine conditions, as well as a timed engine
shutdown feature.
Preset PTO
Preset Enable Conditions In-Cab Operation
To enable PTO:
1. With the engine running, shift the
vehicle into P (Park) and set the parking
brake. Do not press the brake pedal.
2. Confirm cruise control is off.
3. Press and release the PTO in-cab switch
below the climate controls in the center
stack. The PTO clutch will engage. The
PTO indicator light will flash rapidly until
the engine reaches the PTO Standby
Speed and it will then be on steady.
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