Chevrolet GMC Duramax 2023 Manual page 40

TAP DOWN : Press and release SET on the
cruise control to reduce the engine speed by
decrements of 100 rpm. The tap down
engine speed decrements can be adjusted by
the GM Service Tool. In Remote Mode use
Set 1 Switch to reduce engine speed.
Adjustment of tap down engine speed
decrements can be done through vehicle
personalization.
COAST : Press and hold SET on the cruise
control to reduce the rpm at 148 rpm/sec
until the desired engine speed is reached or
until the initial PTO Standby Speed is
reached. Use Set 1 Switch in Remote Mode.
The speed change will happen after
three seconds of holding SET or Set 1
switch.
In-Cab Cruise Control +RES or Remote PTO
Set 2 Switch
RESUME : After a PTO set speed has been
met, a Resume Speed message is retained,
after applying the brake pedal or pressing
on the cruise control . Engine speed will
reduce to basic idle speed. The PTO indicator
light will flash slowly indicating the previous
PTO set speed has been retained in memory.
Press and release +RES on the cruise control
to resume the previous PTO set speed.
TAP UP : Press and release +RES on the
cruise control to increase the engine speed
by increments of 100 rpm. The tap up
engine speed increments can be adjusted by
the GM Service Tool. In Remote Mode use
Set 2 Switch to increase engine speed.
Adjustment of tap down engine speed
increments can be done through vehicle
personalization.
Driving and Operating
ACCEL : Press and hold +RES on the cruise
control to increase the rpm by 148 rpm/sec
until the desired engine speed is reached or
until the maximum allowable PTO set speed
is reached. The speed change will happen
after three seconds of holding +RES or Set 2
switch. Alternatively, the engine speed
acceleration can be adjusted by the GM
Service Tool.
Factory Preset Parameters
The following table lists the factory preset
parameters. These may be altered by the
GM Service Tool to configure the various
PTO features.
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