Chevrolet Impala 2018 Owner's Manual page 186

Warning
ACC will not detect or brake for
children, pedestrians, animals,
or other objects.
Do not use ACC when:
On winding and hilly roads
or when the sensors are
blocked by snow, ice, or dirt.
The system may not detect
a vehicle ahead. Keep the
entire front of the vehicle
clean.
Visibility is low, such as in
fog, rain, or snow
conditions. ACC
performance is limited under
these conditions.
On slippery roads where
fast changes in tire traction
can cause excessive
wheel slip.
: Press to turn the system on or
off. A white Adaptive Cruise Control
indicator comes on.
+RES : Press briefly to resume the
previous set speed or hold to
accelerate. If ACC is already active,
use to increase vehicle speed.
SET : Press briefly to set the
speed and activate ACC. If ACC is
already active, use to decrease
vehicle speed.
: Press to disengage ACC
without erasing the selected set
speed.
Driving and Operating
GAP : Press to select a following
gap time (or distance) setting for
ACC of Far, Medium, or Near.
Setting Adaptive Cruise Control
If the cruise system is on but not in
use, it could get set and go into
cruise when not desired. Keep the
cruise control button off when cruise
is not being used.
Select the set speed desired for
cruise. This is the vehicle speed
when no vehicle is detected in
its path.
ACC will not set or resume at a
speed less than 25 km/h (16 mph).
To set ACC:
1. Press .
2. Get up to the desired speed.
3. Press and release SET .
4. Remove foot from the
accelerator.
After ACC is set, it may immediately
apply the brakes if a vehicle ahead
is closer than the selected
following gap.
185