GMC CHEVROLET Silverado 6500HD 2019 Owner's Manual page 271

270 Driving and Operating
Power Take-Off (PTO)
If equipped, the Power Take-Off
(PTO) is a GM Upfitter integrated
system that is used to create an
auxiliary power source for running
add-on equipment, such as salt
spreaders, snow plows, winches,
and lift buckets. The PTO system
controls engine speed to values
higher than normal base idle, PTO
load relay engagement, and remote
starting and shutdown of the engine.
When installing PTO aftermarket
equipment, the PTO wiring and
operation recommendations
provided by the service manual and
GM Upfitter documentation must be
strictly followed.
Refer to the bulletins in the Upfitter
Integration website
www.gmupfitter.com for the Power
Take Off (PTO) operating
description and application guide.
Warning
Engine exhaust contains Carbon
Monoxide (CO), which cannot be
seen or smelled. Exposure to CO
can cause unconsciousness or
even death. Never operate PTO
in an enclosed area such as a
garage or building that has no
fresh air ventilation. See Engine
Exhaust 0 216.
Caution
If the key is in the ignition 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 before operating
Remote PTO.
Primary PTO Operating Modes
PTO modes of operation are:
Preset
Stationary operation only: In-cab
control is standard, remote
control is available.
Variable
Stationary operation only: In-cab
control is standard, remote
control is available.
Mobile
In-cab control only.
Operator Selectable In-Cab
Mode (OSIM)
OSIM is for 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. The
options for pairing are: stationary
preset and mobile, or stationary
variable and mobile. During
activation of OSIM, the operator