Chevrolet Tahoe 2015 Owner's Manual page 306

Press and hold +RES until the
desired set speed appears on
the display, then release it.
To increase vehicle speed in
small increments, briefly press
+RES. For each press, the
vehicle goes to the next 1 km/h
(1 mph) faster mark on the
speedometer.
When it is determined that there is
no vehicle ahead or the vehicle
ahead is beyond the selected
following gap, then the vehicle
speed will increase to the set speed.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster on
page 5-12. The increment value
used depends on the units
displayed.
Reducing Speed While ACC is at a
Set Speed
If ACC is already activated, do one
of the following:
Use the brake to get to the
desired lower speed. Press
SET and release the
accelerator pedal. The vehicle
will now cruise at the lower
speed.
Press and hold SET until the
desired lower speed is reached,
then release it.
To decrease the vehicle speed in
small increments, briefly press
SET . For each press, the
vehicle speed goes to the next
1 km/h (1 mph) slower mark on
the speedometer.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster on
page 5-12. The increment value
used depends on the units
displayed.
Driving and Operating
Selecting the Follow Distance Gap
When a slower moving vehicle is
detected ahead within the selected
following gap, ACC will adjust the
vehicle's speed and attempt to
maintain the follow distance gap
selected.
Press on the steering wheel to
adjust the following gap. When
pressed, the current gap setting
displays briefly on the instrument
cluster. Subsequent presses cycle
the button through three
settings: Far, Medium, or Near. The
gap setting will be maintained until it
is changed.
Since each gap setting corresponds
to a following time (Far, Medium,
or Near), the following distance will
vary based on vehicle speed. The
faster the vehicle speed, the further
back your vehicle will follow a
vehicle detected ahead. Consider
traffic and weather conditions when
selecting the following gap.
9-53