Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
Driving and Operating
273
6. The Remote PTO Set switch
may be used to select PTO Set
1 and Set 2 engine speeds.
The accelerator pedal is disabled
when Remote PTO operation is
selected.
The operator may exit the vehicle.
{
Warning
If the key is in the ignition during
Remote PTO operation, the
vehicle can be shifted out of
P (Park) by an unauthorized
operator. Even though PTO will
be disengaged, depending on
PTO Upfitter application, personal
injury or property damage may
result from vehicle movement.
The operator must ensure that the
vehicle is secured against
unauthorized access during
Remote PTO operation.
Remote PTO operation may be
ended by pressing the brake pedal
at which time the PTO load relay
disengages and the engine returns
to base idle speed. The vehicle may
be driven after the parking brake is
released.
Preset Enable Conditions
–
Operator Selectable In-Cab
Mode (OSIM)
This requires programming with the
GM Service Tool and requires
pairing OSIM stationary preset with
OSIM mobile mode. If OSIM pairing
has been configured, initiate OSIM
preset operation:
1. With the engine running, shift
the vehicle into P (Park) and
release the brake pedal, and
set the parking brake.
2. Confirm cruise control is off.
3. Confirm the hood is closed.
4. Press and release the in-cab
PTO switch. The PTO indicator
light will blink slowly.
5. Within 10 seconds, press and
release SET
−
on the cruise
control.
6. The PTO indicator light will
change to solid when the PTO
load relay becomes engaged.
The engine speed will advance
to the PTO Standby Speed.
Press and release SET
−
on the
cruise control to select the PTO
Set 1 speed. Press and release
+RES on the cruise control to
select the PTO Set 2 speed.
.
The PTO load relay engages
immediately when the PTO
operation is initiated by the
switch input. The transmission
torque converter is unlocked.
The torque converter will lock
upon reaching stable PTO
Standby Speed (default = 900
rpm) so maximum power is
available.
.
The first elevated engine speed,
PTO Standby Speed, is not
intended as a working speed but
as a verification that the system
is active and ready to go to a
working speed. This speed can
be modified to a working speed
with the GM Service Tool. The
upper limit for PTO Standby
Speed is 1500 rpm.