engine BUICK LACROSSE 2018 Owner's Manual

2018 LaCrosse
23271914 Achevrolet.com (U.S.)
chevrolet.ca (Canada)
Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose
you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead,
which are known to the State of California to cause cancer and birth defects or other
reproductive harm. To minimize exposure, avoid breathing dust, do not idle engine
except as necessary, service your vehicle in a well-ventilated area and wear gloves or
wash your hands frequently when servicing your vehicle. For more information go to
www.P65Warnings.ca.gov/passenger-vehicle.
WARNING
LaCrosse Owner’s Manual
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Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
Introduction 3
{Danger
Danger indicates a hazard with a
high level of risk which will result
in serious injury or death.
{Warning
Warning indicates a hazard that
could result in injury or death.
Caution
Caution indicates a hazard that
could result in property or vehicle
damage.
A circle with a slash through it is a
safety symbol which means“Do
Not,” “Do not do this,” or“Do not let
this happen.”
Symbols
The vehicle has components and
labels that use symbols instead of
text. Symbols are shown along with
the text describing the operation or
information relating to a specific
component, control, message,
gauge, or indicator.
M: Shown when the owner ’s
manual has additional instructions
or information.
*: Shown when the service
manual has additional instructions
or information.
0: Shown when there is more
information on another page —
“see page.”
Vehicle Symbol Chart
Here are some additional symbols
that may be found on the vehicle
and what they mean. See the
features in this manual for
information.
9: Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
$:Brake System Warning Light
":Charging System (12-Volt
Battery)
I: Cruise Control
`:Do Not Puncture
^:Do Not Service
B:Engine Coolant Temperature
O:Exterior Lamps
g: First Responder
_:Flame/Fire Prohibited
.:Fuel Gauge
+: Fuses
3:Headlamp High/Low-Beam
Changer
_: High Voltage
j: LATCH System Child Restraints
*:Malfunction Indicator Lamp
::Oil Pressure
O:Power

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
In Brief 5
In Brief
Instrument Panel
Instrument Panel . . . . . . . . . . . . . . . . 6
Initial Drive Information
Initial Drive Information . . . . . . . . . . 8
Stop/Start System . . . . . . . . . . . . . . . 8
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . 8
Door Locks . . . . . . . . . . . . . . . . . . . . . 9
Trunk Release . . . . . . . . . . . . . . . . . . 9
Windows . . . . . . . . . . . . . . . . . . . . . . . 10
Seat Adjustment . . . . . . . . . . . . . . . 10
Memory Features . . . . . . . . . . . . . . 11
Heated and Ventilated Seats . . . 12
Head Restraint Adjustment . . . . 12
Seat Belts . . . . . . . . . . . . . . . . . . . . . 13
Passenger Sensing System . . . 13
Mirror Adjustment . . . . . . . . . . . . . . 13
Steering Wheel Adjustment . . . . 14
Interior Lighting . . . . . . . . . . . . . . . . 15
Exterior Lighting . . . . . . . . . . . . . . . 16
Windshield Wiper/Washer . . . . . . 16
Climate Controls . . . . . . . . . . . . . . . 17
Transmission . . . . . . . . . . . . . . . . . . 18
Vehicle Features
Infotainment System . . . . . . . . . . . 18 Steering Wheel Controls . . . . . . . 18
Cruise Control . . . . . . . . . . . . . . . . . 18
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . 19
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . . . 19
Forward Automatic Braking (FAB) . . . . . . . . . . . . . . . . 19
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . 19
Lane Keep Assist (LKA) . . . . . . . 20
Lane Change Alert (LCA) . . . . . . 20
Rear Vision Camera (RVC) . . . . 20
Rear Cross Traffic Alert (RCTA) System . . . . . . . . . . . . . . . . . . . . . . . 20
Parking Assist . . . . . . . . . . . . . . . . . 20
Automatic Parking Assist (APA) . . . . . . . . . . . . . . . . . . 21
Power Outlets . . . . . . . . . . . . . . . . . 21
Universal Remote System . . . . . 21
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 22
eAssist Features
eAssist Overview . . . . . . . . . . . . . . 23
High Voltage Safety Information . . . . . . . . . . . . . . . . . . . 23
Automatic Engine Stop/Start Feature . . . . . . . . . . . . . . . . . . . . . . . 23
Regenerative Braking . . . . . . . . . . 24
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 24
Service . . . . . . . . . . . . . . . . . . . . . . . . 24
Performance and Maintenance
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . 24
Tire Pressure Monitor . . . . . . . . . . 25
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
E85 or FlexFuel . . . . . . . . . . . . . . . . 25
Engine Oil Life System . . . . . . . . 25
Driving for Better Fuel Economy . . . . . . . . . . . . . . . . . . . . . 26
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . 26

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
In Brief 7
1.Air Vents 0157.
2. Exterior Lamp Controls 0144.
Fog Lamps 0147.
Instrument Panel Illumination
Control 0148.
3. Turn and Lane-Change Signals
0147.
4. Tap Shift Controls (If Equipped). See Manual Mode
0 185.
5. Instrument Cluster 0110.
Driver Information Center (DIC)
Display. See Driver Information
Center (DIC) 0126.
6. Windshield Wiper/Washer
0105.
7. Hazard Warning Flashers
0146.
8. Light Sensor. See Automatic
Headlamp System 0145.
9. Infotainment 0151.
10. Dual Automatic Climate Control
System 0152.
11. Traction Control/Electronic
Stability Control 0190. Parking Assist Button. See
Driver Assistance Systems
0
203.
SPORT Button (If Equipped).
See Selective Ride Control
0 192.
Lane Keep Assist (LKA) 0216
(If Equipped).
Automatic Parking Assist
Button (If Equipped). See
Driver Assistance Systems
0 203.
12. Shift Lever. See Automatic
Transmission 0181.
13. ENGINE START/STOP Button (Out of View). See Ignition
Positions 0170.
14. Steering Wheel Controls. See the infotainment manual.
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC) 0126.
15. Horn 0105.
16. Steering Wheel Adjustment
0104 (Out of View). 17.
Cruise Control 0193 (If
Equipped).
Adaptive Cruise Control 0195
(If Equipped).
Forward Collision Alert (FCA)
System 0208 (If Equipped).
Heated Steering Wheel 0104
(If Equipped).
18. Head-Up Display (HUD) 0129
(If Equipped).
19. Hood Release (Out of View). SeeHood 0230.
20. Front Storage.
21. Data Link Connector (DLC) (Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0117.
22. Electric Parking Brake 0188.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
8 In Brief
Initial Drive
Information
This section provides a brief
overview about some of the
important features that may or may
not be on your specific vehicle.
For more detailed information, refer
to each of the features which can be
found later in this owner’s manual.
Stop/Start System
The vehicle may be equipped with a
fuel saving stop/start system to shut
off the engine and help
conserve fuel.
When the brakes are applied and
the vehicle is at a complete stop,
the engine may turn off. When the
brake pedal is released or the
accelerator pedal is pushed, the
engine will restart.
SeeStarting the Engine 0172.
Remote Keyless Entry
(RKE) System
The Remote Keyless Entry (RKE)
transmitter may work up to 60 m
(197 ft) away from the vehicle.
With Remote Start Shown
Q:Press to lock all doors.
K:Press to unlock the driver door
or all doors.
Lock and unlock feedback can be
personalized. See Vehicle
Personalization 0133.
X:Press twice quickly to release
the trunk.
7: Press and release to initiate
vehicle locator. Press and hold for at
least three seconds to sound the
panic alarm. Press again to cancel
the panic alarm.
See Keys 027 and Remote Keyless
Entry (RKE) System Operation 028.
Remote Vehicle Start
If equipped, the engine can be
started from outside of the vehicle.
Starting the Vehicle
1. Press and releaseQon the
RKE transmitter.
2. Immediately press and hold
/
for at least four seconds or until
the turn signal lamps flash.
Start the vehicle normally after
entering.
When the vehicle starts, the parking
lamps will turn on.
Remote start can be extended.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
In Brief 23
eAssist Features
eAssist Overview
Vehicles with the 2.5L engine have
eAssist, with additional features that
contribute to increased efficiency.
Vehicles with eAssist have an
automatic engine Stop/Start feature.
This feature saves fuel by shutting
the engine off when the vehicle is
stopped. When the engine shuts off
automatically, all the accessories
will continue to operate normally. In
very hot or cold conditions, the
engine may not shut off. See
Starting the Engine0172.
There are two air conditioning
settings available. The MAX setting
maximizes cabin comfort. The ECO
setting maximizes efficiency
allowing more frequent, and longer
engine stops than the MAX setting.
See Dual Automatic Climate Control
System 0152.
Vehicles with eAssist include an
AUTO STOP indicator on the
tachometer. See Instrument Cluster
0 110. The eAssist system uses a high
voltage battery, which is cooled with
air drawn from the vehicle interior.
The cold air intake for the battery is
under the leading edge of the rear
seat. The exhaust for warm air is in
the trunk. Do not cover the intake or
exhaust. See
Battery - North
America 0247.
High Voltage Safety
Information
Vehicles with eAssist have a
standard 12-volt battery and a high
voltage battery. Only a trained
service technician with the proper
knowledge and tools should inspect,
test, or replace the high voltage
battery. See your dealer if the high
voltage battery needs service.
In emergency situations, first
responders can cut the two clearly
labeled cut points in the engine
compartment to disable the high
voltage battery and air bag systems.
Do not cut the high voltage cable.
Automatic Engine Stop/
Start Feature
Vehicles with eAssist have an
automatic engine Stop/Start feature.
After the engine is started and has
reached operating temperature, this
feature may cause Auto Stop which
will turn the engine off when the
brake pedal is applied and the
vehicle comes to a complete stop.
When the brake pedal is released,
or the accelerator pedal is applied,
the engine will restart. The engine
will continue to run until the next
Auto Stop.
AUTO STOP on the tachometer
signifies that the engine is in Auto
Stop mode. See Tachometer0112.
Remember to put the transmission
in P (Park) and turn the ignition off
before exiting the vehicle.
See Starting the Engine 0172.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
In Brief 25
Tire Pressure Monitor
This vehicle may have a Tire
Pressure Monitor System (TPMS).
The low tire pressure warning light
alerts to a significant loss in
pressure of one of the vehicle's
tires. If the warning light comes on,
stop as soon as possible and inflate
the tires to the recommended
pressure shown on the Tire and
Loading Information label. See
Vehicle Load Limits0166. The
warning light will remain on until the
tire pressure is corrected.
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
may be an early indicator that the
tire pressures are getting low and
the tires need to be inflated to the
proper pressure. The TPMS does not replace normal
monthly tire maintenance. Maintain
the correct tire pressures.
See
Tire Pressure Monitor System
0 268.
Fuel
Regular Fuel
Use only unleaded gasoline rated
87 octane or higher in your vehicle.
Do not use gasoline with an octane
rating lower as it may result in
vehicle damage and lower fuel
economy. See Fuel0218.
E85 or FlexFuel
No E85 or FlexFuel
Gasoline-ethanol fuel blends greater
than E15 (15% ethanol by volume),
such as E85, cannot be used in this
vehicle.
Engine Oil Life System
The engine oil life system calculates
engine oil life based on vehicle use
and displays the CHANGE ENGINE
OIL SOON message when it is time
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
26 In Brief
Resetting the Oil Life System1. Using the DIC controls on the right side of the steering wheel,
display REMAINING OIL LIFE
on the DIC. See Driver
Information Center (DIC) 0126.
When remaining oil life is low,
the CHANGE ENGINE OIL
SOON message will appear on
the display.
2. Press
Von the DIC controls
and hold down for a few
seconds to clear the CHANGE
ENGINE OIL SOON message
and reset the oil life at 100%.
Be careful not to reset the oil
life display accidentally at any
time other than after the oil is
changed. It cannot be reset
accurately until the next oil
change.
See Engine Oil Life System 0237.
Driving for Better Fuel
Economy
Driving habits can affect fuel
mileage. Here are some driving tips
to get the best fuel economy
possible.
.
Avoid fast starts and accelerate
smoothly.
. Brake gradually and avoid
abrupt stops.
. Avoid idling the engine for long
periods of time.
. When road and weather
conditions are appropriate, use
cruise control.
. Always follow posted speed
limits or drive more slowly when
conditions require.
. Keep vehicle tires properly
inflated.
. Combine several trips into a
single trip.
. Replace the vehicle's tires with
the same TPC Spec number
molded into the tire's sidewall
near the size. .
Follow recommended scheduled
maintenance.Roadside Assistance
Program
U.S.: 1-800-252-1112
TTY Users (U.S. Only):
1-888-889-2438
Canada: 1-800-268-6800
New Buick owners are automatically
enrolled in the Roadside Assistance
Program.
See Roadside Assistance Program
0 329.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
Keys, Doors, and Windows 29
Q:Press to lock all doors.
The turn signal indicators may flash
and/or the horn may sound on the
second press to indicate locking.
See Vehicle Personalization 0133.
If the driver door is open when
Qis
pressed and enabled through
vehicle personalization, all doors will
lock and the driver door will
immediately unlock.
If the passenger door is open when
Qis pressed, all doors lock.
Pressing
Qmay also arm the
theft-deterrent system. See Vehicle
Alarm System 042.
K:Press to unlock the driver door.
Press again within five seconds to
unlock all doors. The RKE
transmitter can be programmed to
unlock all doors on the first button
press. See Vehicle Personalization
0 133.
The turn signal indicators may flash
to indicate unlocking. See Vehicle
Personalization 0133.
Pressing
Kwill disarm the
theft-deterrent system. See Vehicle
Alarm System 042.
Memory seat positions may be
recalled when unlocking the vehicle.
See Memory Seats 055 and
Vehicle Personalization 0133.
X:Press twice quickly to release
the trunk.
7: Press and release to initiate
vehicle locator. The exterior lamps
flash and the horn chirps three
times.
Press and hold
7for at least
three seconds to sound the panic
alarm. The horn sounds and the turn signals flash for 30 seconds
until
7is pressed again or the
vehicle is started.
/: If equipped, pressQand
release and then immediately press
and hold
/for at least
four seconds to start the engine
from outside the vehicle using the
RKE transmitter. See Remote
Vehicle Start 034.
Keyless Access Operation
If equipped with a Keyless Access
system, it allows for locking and
unlocking the doors and accessing
the trunk without removing the RKE
transmitter from your pocket, purse,
briefcase, etc. The RKE transmitter
should be within 1 m (3 ft) of the
trunk or door being opened. If the
vehicle has this feature, there will be
buttons on the outside of the door
handles.
Keyless Access can be
programmed to unlock all doors on
the first unlock/lock button press
from the driver door. See Vehicle
Personalization 0133.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-10999169) -
2018 - crc - 3/28/17
32 Keys, Doors, and Windows
5. Press ENGINE START/STOP.When the transmitter is
learned, the DIC will show that
it is ready to program the next
transmitter.
6. Remove the transmitter from the transmitter pocket and
press
K.
To program additional
transmitters, repeat Steps 3–5.
When all additional transmitters
are programmed, press and
hold ENGINE START/STOP for
12 seconds to exit
programming mode.
7. Put the key back into the transmitter.
Programming without Recognized
Transmitters
If two currently recognized
transmitters are not available, follow
this procedure to program up to
eight transmitters. This feature is
not available in Canada. This
procedure will take approximately
30 minutes to complete. The vehicle must be off and all of the
transmitters you wish to program
must be with you.
1. Remove the key lock cylinder cap on the driver door handle.
See Door Locks 036.
2. Insert the vehicle key of the transmitter into the key lock
cylinder on the outside of the
driver door and turn the key to
the unlock position five times
within 10 seconds.
The Driver Information Center
(DIC) displays REMOTE
LEARN PENDING,
PLEASE WAIT.
3. Wait for 10 minutes until the DIC displays PRESS ENGINE
START BUTTON TO LEARN
and then press ENGINE
START/STOP.
The DIC display will again
show REMOTE LEARN
PENDING, PLEASE WAIT.
4. Repeat Step 2 two additional times. After the third time, all
previously known transmitters
will no longer work with the vehicle. Remaining transmitters
can be relearned during the
next steps.
The DIC display should now
show READY FOR
REMOTE #1.
5. Place the new transmitter into
the transmitter pocket inside
the armrest storage area.
6. Press ENGINE START/STOP. When the transmitter is learned
the DIC will show that it is
ready to program the next
transmitter.