Black plate (44,1)
Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U.S./Canada-
7132827) - 2015 - CRC - 6/5/14
9-44
Driving and Operating
desired PTO operating speed.
Additional information is available in
the service manual for the correct
wiring configuration and
programming of the remote PTO
enable and set switches. These
switch connections are accessed
through the PTO upfitter connector,
located on the chassis frame,
behind the vehicle compartment.
Enabling Conditions
–
Mobile PTO
To engage mobile PTO operation,
the following conditions must be met
prior to turning on PTO:
.
The engine must be running.
.
The vehicle speed must be less
than the PTO top vehicle speed
limit. The default setting is
94 km/h (58 mph). This limit can
be adjusted by a service
technician.
.
The shift lever may be in M1, M2
or M3. When placed in M2 or
M3, the vehicle will upshift
according to engine RPM set
point and vehicle speed.
.
The brake must be pressed and
then released. The brake must
then remain released.
.
Cruise control cannot be
enabled or active.
.
Engine speed must be less than
the maximum allowed PTO
engage speed of 1500 rpm.
.
Press and release the PTO in
cab switch. The PTO indicator
light will blink fast until the PTO
load becomes engaged, at which
point the indicator light will be on
steady. The SET
–
and +RES
cruise control buttons can then
be used to establish the desired
PTO operating speed. See
“
Variable PTO Mode
”
and
“
PTO
Switch Operation
”
later in this
section.
DIC WARNING MESSAGES
One or more of the following Driver
Information Center (DIC) messages
may appear if the PTO will not
engage. The operator must take the
action indicated, then attempt to
re-enable PTO.
.
PTO: SHIFT TO PARK OR
NEUTRAL (Stationary only)
.
PTO: SET PARK BRAKE
(Stationary only)
.
PTO: PRESS & RELEASE
BRAKE (Mobile only)
.
PTO: RELEASE BRAKE
.
PTO: REDUCE VEHICLE
SPEED
.
PTO: REDUCE ENGINE SPEED
.
PTO: DISENGAGE CRUISE
CONTROL (Mobile only)
In addition to these messages, the
PTO indicator light will indicate
when all conditions required to
engage PTO have not been met.
When enabling PTO, the indicator
light will turn on, then off after
one second. Under normal
operating conditions, the PTO
indicator light will remain on
throughout the PTO operating cycle.
