Chevrolet Low Cab Forward 2016 Manual page 224

When the vehicle speed
decreases more than 20%
below your set speed (3500
model only).
When the cruise control main
switch is turned off.
When the engine control switch
is turned to the LOCK position.
When trouble develops in the
system.
Memory speed is eliminated.
When you do not use the cruise
control, be sure to place the cruise
control main switch into off.
When you place the engine control
switch into ACC, place the cruise
control main switch into off, then
reset the cruise control if you want
to use the cruise control again.
Using Cruise Control on Hills
How well your cruise control will
work on hills depends upon your
speed, load and the steepness of
the hills. When going up steep hills,
you may want to step on the
accelerator pedal to maintain your
speed. When going downhill, you
may have to brake or shift to a lower
gear to keep your speed down. Of
course, applying the brake takes
you out of cruise control. Many
drivers find this to be too much
trouble and do not use cruise
control on steep hills.
When Returning to Cruise Control
Driving
If you have canceled cruise control
under the following conditions, you
can return to the cruise control
driving condition before cancellation
when you operate and release the
cruise control resume switch. The
moment the resume switch is
released, the cruise set indicator
light comes on.
When pressing the brake pedal.
When the selector lever is
shifted to the N or 1st position.
When the vehicle speed decreases
to 30 km/h (19 MPH) or less, it is
not possible to return to the cruise
control driving. You must reset the
cruise control.
Driving and Operating
For 3500 models, if the cruise
control is turned back on while the
vehicle speed exceeds what is set
prior to the cancellation of cruise
control, the set vehicle speed
cannot be changed until the vehicle
reaches to the set speed. Also, the
vehicle speed must be 1 MPH
below the previously set vehicle
speed.
For 4500 models, if you hold the
switch at the +RES position, the
vehicle will keep going faster until
you release the switch or apply the
brake. So unless you want to go
faster, do not hold the switch at the
+RES position.
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