Chevrolet Silverado 4500HD 2022 Owner's Manual page 260

258 Driving and Operating
The accelerator pedal can be used to
achieve the desired speed. When the
desired speed is reached, SET on the
cruise control would be used to
capture and maintain that speed.
Normal tap up and tap down can then
be used to fine tune the setting.
In Mobile PTO mode, the vehicle speed
achieved is the result of the current engine
speed requested and the transmission gear
range selected. When the vehicle is placed in
M2 or M3, the vehicle will upshift according
to engine rpm set point, and vehicle speed
will increase. To prevent upshifts and
maintain lower vehicle speeds, place the
vehicle in M1.
Mobile Enable Conditions Operator
Selectable In-Cab Mode (OSIM)
This requires programming with the GM
Service Tool and specific pairing mobile
mode with either stationary preset or
variable. Remote operation is not available.
See Mobile PTO previously in this section.
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 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
vehicle may be driven.