Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336155) - 2020 - CRC - 5/6/19
Driving and Operating
51
Variable Enable Conditions
–
Remote Operation In-Cab Enable
Starting Remote Operation from
In-Cab
This requires programming with the
GM Service Tool and remote switch
panel provided by GM Upfitter.
1. With the engine running, shift
the vehicle into P (Park),
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 PTO
in-cab switch.
5. The horn will chirp, the PTO
load relay will engage, and the
engine will advance to the PTO
Standby Speed.
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.
The accelerator pedal is disabled
when Remote PTO operation is
selected.
Remote PTO operation can be
ended by pressing the brake pedal.
The PTO load relay disengages and
the engine returns to base idle
speed. The operator may drive the
vehicle after releasing the parking
brake.
.
The desired engine operating
speed can now be
accomplished. Two versions of
engine rpm control are available,
switches or potentiometer,
depending on which one was
installed.
‐
Switches
–
the Remote PTO
Set and Resume switches can
be used to tap up and tap
down to the desired engine
speed.
‐
Potentiometer
–
a Remote
PTO Throttle Potentiometer
can be used as a continuous
variable throttle control to dial
in the desired engine speed.
Variable Enable Conditions
–
OSIM
This requires programming with the
GM Service Tool and specific
pairing of stationary variable and
mobile modes. Remote operation is
not available.
If OSIM pairing has been
configured, initiate OSIM stationary
variable operation: