2015 CHEVROLET IMPALA brake sensor

Black plate (3,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
In Brief 1-3
1.Instrument Panel Illumination
Control on page 6-4.
2. Air Vents on page 8-7.
3. Trunk Release. See Trunk on
page 2-15.
Parking Assist Button. See
Assistance Systems for Parking
or Backing on page 9-44 (If
Equipped).
Lane Departure Warning (LDW)
Button. See Lane Departure
Warning (LDW) on page 9-52.
4. Turn Signal Lever. See Turn and
Lane-Change Signals on
page 6-4.
5. Instrument Cluster on page 5-9.
Driver Information Center (DIC)
on page 5-25.
6. Windshield Wiper/Washer on
page 5-4.
7. Hazard Warning Flashers on
page 6-3.
8. Light Sensor. See Automatic
Headlamp System on page 6-2. 9. Storage Area with USB Port
Inside (If Equipped). See
Instrument Panel Storage on
page 4-1 andUSB Port on
page 7-14.
10. Infotainment on page 7-1.
11. CD Player on page 7-11.
12. Electric Parking Brake. See Parking Brake on page 9-29.
13. Data Link Connector (Out of View). See Malfunction
Indicator Lamp on page 5-17.
14. Hood Release. See Hood on
page 10-4.
15. Instrument Panel Storage on
page 4-1 (If Equipped).
Fuse Cover. See Instrument
Panel Fuse Block on
page 10-35. 16.
Cruise Control on page 9-33 (If
Equipped).
Adaptive Cruise Control on
page 9-35 (If Equipped).
Heated Steering Wheel on
page 5-3 (If Equipped).
Forward Collision Alert (FCA)
System on page 9-46 (If
Equipped).
17. Steering Wheel Controls on
page 5-3 (Out of View).
18. Steering Wheel Adjustment on
page 5-2.
19. Horn on page 5-3.
20. Steering Wheel Controls on
page 5-3.
Driver Information Center
Buttons. See Driver Information
Center (DIC) on page 5-25.
21. Ignition Positions (Keyless
Access) on page 9-14 or
Ignition Positions (Key Access)
on page 9-16.

Black plate (29,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
Instruments and Controls 5-29
pulsation in the brake pedal. This is
normal under these conditions. Take
the vehicle to your dealer for
service.
SERVICE PARKING BRAKE
This message is displayed when
there is a problem with the parking
brake. Take the vehicle to your
dealer for service.
STEP ON BRAKE TO
RELEASE PARK BRAKE
This message is displayed if you
attempt to release the Electric
Parking Brake without the brake
pedal applied. SeeParking Brake
on page 9-29.
Compass Messages
Dashes may be displayed if the
vehicle temporarily loses
communication with the Global
Positioning System (GPS).
Cruise Control Messages
ADAPTIVE CRUISE SET
TO XXX
This message displays when the
Adaptive Cruise Control (ACC)
speed is set. See Adaptive Cruise
Control on page 9-35.
ADAPTIVE CRUISE
TEMPORARILY UNAVAILABLE
This message displays when
attempting to activate Adaptive
Cruise Control (ACC) when it is
temporarily unavailable. The ACC
system does not need service.
This can occur under the following
conditions:
.Cruise is turned on when the
vehicle is stopped.
.The radar can't see objects well.
See next message.
FRONT RADAR BLOCKED —
SEE OWNER MANUAL
This message can occur under the
following conditions:
.The radar is not clean. Keep the
radar sensors free of mud, dirt,
snow, ice, and slush. Clean the
entire front and/or rear of the
vehicle. For cleaning
instructions, see Exterior Care
on page 10-71.
.Heavy rain or snow is interfering
with the radar object detection or
camera performance.
CRUISE SET TO XXX
This message displays when the
cruise control speed is set. See
Cruise Control on page 9-33.
NO CRUISE BRAKING GAS
PEDAL APPLIED
This message displays when
Adaptive Cruise Control (ACC) is
active and the driver is pressing the

Black plate (35,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
Driving and Operating 9-35
.To decrease the vehicle speed in
smaller increments, briefly press
SET−. For each press, the
vehicle goes about 1.6 km/h
(1 mph) slower.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster on
page 5-9. The increment value used
depends on the units displayed.
Passing Another Vehicle While
Using Cruise Control
Use the accelerator pedal to
increase vehicle speed. When you
take your foot off the pedal, the
vehicle will slow down to the
previous set cruise speed. While
pressing the accelerator pedal or
shortly following the release to
override cruise control, briefly
pressing the SET− button will result
in cruise control set to the current
vehicle speed. Using Cruise Control on Hills
How well the cruise control works
on hills depends upon the vehicle
speed, the load, and the steepness
of the hills. When going up steep
hills, you might have to step on the
accelerator pedal to maintain your
speed. When going downhill, you
might have to brake or shift to a
lower gear to keep your speed
down. If the brake pedal is applied,
the cruise control will disengage.
Ending Cruise Control
There are four ways to end cruise
control:
.To disengage cruise control,
step lightly on the brake pedal.
.Press the*.
.Shift the transmission to
N (Neutral).
.To turn off the cruise control,
press
5.Erasing Speed Memory
The cruise control set speed is
erased from memory if
5is pressed
or the ignition is turned off.
Adaptive Cruise Control
If equipped, Adaptive Cruise Control
(ACC) allows the driver to select the
cruise control set speed and
following gap. Read this entire
section before using this system.
The following gap is the following
time between your vehicle and a
vehicle detected directly ahead in
your path moving in the same
direction. If no vehicle is detected in
your path, ACC works like regular
cruise control. ACC uses a radar
sensor. See Radio Frequency
Statement on page 13-12.
If a vehicle is detected in your path,
ACC can apply acceleration or
limited, moderate braking to
maintain the selected following gap.
To disengage ACC, apply the brake.
If ACC is controlling your vehicle
speed when the Traction Control

Black plate (36,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
9-36 Driving and Operating
System (TCS) or StabiliTrak®
System activates, the ACC may
automatically disengage. When road
conditions allow ACC to be safely
used, the ACC can be turned back
on. If TCS or StabiliTrak have been
disabled, the ACC will not engage.
SeeTraction Control/Electronic
Stability Control on page 9-31.
{Warning
ACC has limited braking ability
and may not have time to slow
the vehicle down enough to avoid
a collision with another vehicle
you are following. This can occur
when vehicles suddenly slow or
stop ahead, or enter your lane.
Also see “Alerting the Driver” in
this section. Complete attention is
always required while driving and
you should be ready to take
action and apply the brakes. See
Defensive Driving on page 9-3.
{Warning
Adaptive Cruise Control will not
detect or brake for children,
pedestrians, animals, or other
objects.
Do not use Adaptive Cruise
Control 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.
Adaptive Cruise Control
performance is limited under
these conditions.
.On slippery roads where fast
changes in tire traction can
cause excessive wheel slip.
](On/Off): Press to turn the
system on or off. A white Adaptive
Cruise Control indicator comes on.
+RES (Resume/Accelerate):
Press briefly to resume the previous
set speed or hold to accelerate.
If ACC is already active, use to
increase vehicle speed.
SET– (Set/Coast): Press briefly to
set the speed and activate ACC.
If ACC is already active, use to
decrease vehicle speed.

Black plate (40,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
9-40 Driving and Operating
ACC Automatically Disengages
ACC may automatically disengage
and the driver will need to manually
apply the brakes to slow the
vehicle when:
.The sensors are blocked.
.The Traction Control System
(TCS) or electronic stability
control system has activated or
been disabled.
.There is no traffic or other
objects to detect.
.There is a fault in the system.
A message indicating that the cruise
is disengaging will appear on the
DIC and the ACC active symbol will
not be displayed when ACC is no
longer active.
Notification to Resume ACC
ACC will maintain a following gap
behind a detected vehicle and slow
your vehicle to a stop behind that
vehicle. If the stopped vehicle ahead has
driven away and ACC has not been
resumed, the vehicle ahead symbol
will flash as a reminder to check
traffic ahead before proceeding. In
addition, three beeps will sound.
See
“Go Notifier” under Collision/
Detection systems in Vehicle
Personalization on page 5-37.
When the vehicle ahead drives
away, press RES+ or the
accelerator pedal to resume cruise
control. If stopped for more than
two minutes or if the driver door is
opened, the ACC automatically
applies the Electric Parking Brake to
hold the vehicle. The Electric
Parking Brake status light will turn
on. See Parking Brake on
page 9-29. To resume ACC and
release the Electric Parking Brake,
press the accelerator pedal. ACC
can be resumed when the vehicle is
travelling greater than 25 km/h
(16 mph). A DIC warning message may
display indicating to shift to P (Park)
before exiting the vehicle. See
Vehicle Messages on page 5-28.
{Warning
If ACC has stopped the vehicle,
and if ACC is disengaged, turned
off, or canceled, the vehicle will
no longer be held at a stop. The
vehicle can move. When ACC is
holding the vehicle at a stop,
always be prepared to manually
apply the brakes.
{Warning
Leaving the vehicle without
placing it in P (Park) can be
dangerous. Do not leave the
vehicle while it is being held at a
stop by ACC. Always place the
vehicle in P (Park) and turn off
the ignition before leaving the
vehicle.

Black plate (43,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
Driving and Operating 9-43
Cleaning the Sensing System
The radar sensor on the front of the
vehicle can become blocked by
snow, ice, dirt, or mud. These areas
need to be cleaned for ACC to
operate properly.
For cleaning instructions, see
“Washing the Vehicle”under
Exterior Care on page 10-71.
System operation may also be
limited under snow, heavy rain or
road spray conditions.Driver Assistance
Systems
This vehicle may have features that
work together to help avoid crashes
or reduce crash damage while
driving, backing, and parking. Read
this entire section before using
these systems.
{Warning
Do not rely on the Driver
Assistance Systems. These
systems do not replace the need
for paying attention and driving
safely. You may not hear or see
alerts or warnings provided by
these systems. Failure to use
proper care when driving may
result in injury, death, or vehicle
damage. See Defensive Driving
on page 9-3.
(Continued)
Warning (Continued)
Under many conditions, these
systems will not:
.Detect children, pedestrians,
bicyclists, or animals.
.Detect vehicles or objects
outside the area monitored by
the system.
.Work at all driving speeds.
.Warn you or provide you with
enough time to avoid a crash.
.Work under poor visibility or
bad weather conditions.
.Work if the detection sensor
is not cleaned or is covered
by ice, snow, mud, or dirt.
Complete attention is always
required while driving, and you
should be ready to take action
and apply the brakes and/or steer
the vehicle to avoid crashes.

Black plate (47,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
Driving and Operating 9-47
{Warning
FCA is a warning system and
does not apply the brakes. When
approaching a slower-moving or
stopped vehicle ahead too rapidly,
or when following a vehicle too
closely, FCA may not provide a
warning with enough time to help
avoid a crash. FCA does not warn
of pedestrians, animals, signs,
guardrails, bridges, construction
barrels, or other objects. Be ready
to take action and apply the
brakes. For more information, see
Defensive Driving on page 9-3.
FCA can be disabled with the FCA
steering wheel control, or if your
vehicle is equipped with Adaptive
Cruise Control (ACC), through
vehicle personalization. See the
“Auto Collision Preparation” portion
of “Collision/Detection Systems”
under Vehicle Personalization on
page 5-37.
Detecting the Vehicle Ahead
FCA warnings will not occur unless
the FCA system detects a vehicle
ahead. When a vehicle is detected,
the vehicle ahead indicator will
display green. Vehicles may not be
detected on curves, highway exit
ramps, or hills; or due to poor
visibility. FCA will not detect another
vehicle ahead until it is completely
in the driving lane.
{Warning
FCA does not provide a warning
to help avoid a crash, unless it
detects a vehicle. FCA may not
detect a vehicle ahead if the FCA
sensor is blocked by dirt, snow,
(Continued)
Warning (Continued)
or ice, or if the windshield is
damaged. It may also not detect a
vehicle on winding or hilly roads,
or in conditions that can limit
visibility such as fog, rain,
or snow, or if the headlamps or
windshield are not cleaned or in
proper condition. Keep the
windshield, headlamps, and FCA
sensors clean and in good repair.
Collision Alert
When your vehicle approaches
another detected vehicle too rapidly,
the red lights will flash on the
windshield. Also, eight rapid
high-pitched beeps will sound from
the front. When this Collision Alert

Black plate (48,1)Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-7576026) -
2015 - crc 2nd edition - 8/21/14
9-48 Driving and Operating
occurs, the brake system may
prepare for driver braking to occur
more rapidly which can cause a
brief, mild deceleration. Continue to
apply the brake pedal as needed.
Cruise control may be disengaged
when the Collision Alert occurs.
Tailgating Alert
The vehicle ahead indicator will
display amber when you are
following a detected vehicle ahead
much too closely.
Selecting the Alert Timing
The Collision Alert control is on the
steering wheel. Press
3/[to
set the FCA timing to Far, Medium,
Near, or on some vehicles, Off. The
first button press shows the current
setting on the DIC. Additional button
presses will change this setting. The chosen setting will remain until it is
changed and will affect the timing of
both the Collision Alert and the
Tailgating Alert features. The timing
of both alerts will vary based on
vehicle speed. The faster the
vehicle speed, the farther away the
alert will occur. Consider traffic and
weather conditions when selecting
the alert timing. The range of
selectable alert timing may not be
appropriate for all drivers and
driving conditions.
If your vehicle is equipped with
Adaptive Cruise Control (ACC),
changing the FCA timing setting
automatically changes the following
gap setting (Far, Medium, or Near).
Unnecessary Alerts
FCA may provide unnecessary
alerts for turning vehicles, vehicles
in other lanes, objects that are not
vehicles, or shadows. These alerts
are normal operation and the
vehicle does not need service.
Cleaning the System
If the FCA system does not seem to
operate properly, cleaning the
outside of the windshield in front of
the camera sensor behind the
rearview mirror, and cleaning the
front of the vehicle where radar
sensors are located, may correct
the issue.
Active Emergency
Braking System
If the vehicle has Adaptive Cruise
Control (ACC) it also has the Active
Emergency Braking System, which
includes Intelligent Brake
Assist (IBA) and the Automatic
Collision Preparation (ACP) System.
These systems can provide a boost
to braking or automatically brake the
vehicle to help avoid or lessen the
severity of crashes when driving in a
forward gear.