
Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . 2
In Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Keys, Doors, and Windows . . . . . 28
Seats and Restraints . . . . . . . . . . . 52
Storage . . . . . . . . . . . . . . . . . . . . . . . 102
Instruments and Controls . . . . . . 105
Lighting . . . . . . . . . . . . . . . . . . . . . . . 149
Infotainment System . . . . . . . . . . 156
Climate Controls . . . . . . . . . . . . . . 157
Driving and Operating . . . . . . . . . 164
Vehicle Care . . . . . . . . . . . . . . . . . . 234
Service and Maintenance . . . . . 318
Technical Data . . . . . . . . . . . . . . . . 332
Customer Information . . . . . . . . . 335
Reporting Safety Defects . . . . . . 345
OnStar . . . . . . . . . . . . . . . . . . . . . . . . 349
Connected Services . . . . . . . . . . . 357
Index . . . . . . . . . . . . . . . . . . . . 361

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
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 . . . 11
Head Restraint Adjustment . . . . 12
Seat Belts . . . . . . . . . . . . . . . . . . . . . 12
Passenger Sensing System . . . 12
Mirror Adjustment . . . . . . . . . . . . . . 13
Steering Wheel Adjustment . . . . 13
Interior Lighting . . . . . . . . . . . . . . . . 14
Exterior Lighting . . . . . . . . . . . . . . . 15
Windshield Wiper/Washer . . . . . . 15
Climate Controls . . . . . . . . . . . . . . . 16
Transmission . . . . . . . . . . . . . . . . . . 17
Vehicle Features
Infotainment System . . . . . . . . . . . 18
Steering Wheel Controls . . . . . . . 18
Cruise Control . . . . . . . . . . . . . . . . . 19
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . 19
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . 20
Forward Automatic Braking (FAB) . . . . . . . . . . . . . . . . 20
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . 20
Lane Keep Assist (LKA) . . . . . . . 20
Lane Change Alert (LCA) . . . . . . 20
Rear Vision Camera (RVC) . . . . 21
Rear Cross Traffic Alert (RCTA) System . . . . . . . . . . . . . . . . . . . . . . . 21
Parking Assist . . . . . . . . . . . . . . . . . 21
Automatic Parking Assist (APA) . . . . . . . . . . . . . . . . . . 21
Power Outlets . . . . . . . . . . . . . . . . . 21
Universal Remote System . . . . . 22
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 22
eAssist Features
eAssist Overview . . . . . . . . . . . . . . 23
High Voltage Safety Information . . . . . . . . . . . . . . . . . . . 24
Automatic Engine Stop/Start Feature . . . . . . . . . . . . . . . . . . . . . . . 24 Regenerative Braking . . . . . . . . . . 24
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 24
Service . . . . . . . . . . . . . . . . . . . . . . . . 24
Performance and Maintenance
Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . 25
Tire Pressure Monitor . . . . . . . . . . 25
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
E85 or FlexFuel . . . . . . . . . . . . . . . . 26
Engine Oil Life System . . . . . . . . 26
Driving for Better Fuel Economy . . . . . . . . . . . . . . . . . . . . . 26
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . 27

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
In Brief 7
1.Air Vents 0162.
2. Exterior Lamp Controls 0149.
Fog Lamps 0152.
Instrument Panel Illumination
Control 0153.
3. Turn and Lane-Change Signals
0152.
4. Tap Shift Controls (If Equipped). See Manual Mode
0 191.
5. Instrument Cluster 0114.
Driver Information Center (DIC)
Display. See Driver Information
Center (DIC) 0131.
6. Windshield Wiper/Washer
0107.
7. Hazard Warning Flashers
0151.
8. Light Sensor. See Automatic
Headlamp System 0150.
9. Infotainment 0156.
10. Dual Automatic Climate Control
System 0157. 11.
Traction Control/Electronic
Stability Control 0196.
Park Assist Button (If
Equipped). See Driver
Assistance Systems 0208.
SPORT Button (If Equipped).
See Selective Ride Control
0 198.
Lane Keep Assist (LKA) 0222
(If Equipped).
Automatic Parking Assist
Button (If Equipped). See
Driver Assistance Systems
0 208.
12. Shift Lever. See Automatic
Transmission 0187.
13. ENGINE START/STOP Button (Out of View). See Ignition
Positions 0176.
14. Steering Wheel Controls. See the infotainment manual.
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC) 0131.
15. Horn 0107. 16.
Steering Wheel Adjustment
0106 (Out of View).
17. Cruise Control 0199 (If
Equipped).
Adaptive Cruise Control 0201
(If Equipped).
Forward Collision Alert (FCA)
System 0214 (If Equipped).
Heated Steering Wheel 0106
(If Equipped).
18. Head-Up Display (HUD) 0134
(If Equipped).
19. Hood Release (Out of View). SeeHood 0237.
20. Front Storage.
21. Data Link Connector (DLC) (Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0122.
22. Electric Parking Brake 0193.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
In Brief 15
The front reading lamps are in the
overhead console.
Press the lamp lenses to turn the
front reading lamps on or off.
The rear reading lamps are over the
rear passenger doors.
Press the lamp lenses to turn the
rear reading lamps on or off.
For more information on interior
lighting, seeInstrument Panel
Illumination Control 0153.
Exterior Lighting
The exterior lamp control is on the
instrument panel to the left of the
steering column.
There are four positions.
O:Turns the exterior lamps off and
deactivates the AUTO mode. Turn
to
Oagain to reactivate the
AUTO mode.
In Canada, the headlamps will
automatically reactivate when the
vehicle is shifted out of P (Park).
AUTO : Turns the exterior lamps on
and off automatically depending on
outside lighting.
;: Turns on the parking lamps
including all lamps, except the
headlamps.
5: Turns on the headlamps
together with the parking lamps and
instrument panel lights.
See:
. Exterior Lamp Controls 0149.
. Daytime Running Lamps (DRL)
0150.
Windshield Wiper/Washer
With the ignition on or in ACC/
ACCESSORY, move the windshield
wiper lever to select the wiper
speed.
HI : Use for fast wipes.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Instruments and Controls 105
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . 106
Steering Wheel Controls . . . . . . 106
Heated Steering Wheel . . . . . . . 106
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Windshield Wiper/Washer . . . . 107
Compass . . . . . . . . . . . . . . . . . . . . . 108
Clock . . . . . . . . . . . . . . . . . . . . . . . . . 108
Power Outlets . . . . . . . . . . . . . . . . 108
Wireless Charging . . . . . . . . . . . . 110
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . 113
Instrument Cluster . . . . . . . . . . . . 114
Speedometer . . . . . . . . . . . . . . . . . 116
Odometer . . . . . . . . . . . . . . . . . . . . . 116
Tachometer . . . . . . . . . . . . . . . . . . . 116
Fuel Gauge . . . . . . . . . . . . . . . . . . . 117
Driver Efficiency Gauge (eAssist) . . . . . . . . . . . . . . . . . . . . 118
Engine Oil Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 118 Engine Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 119
Voltmeter Gauge . . . . . . . . . . . . . . 119
Seat Belt Reminders . . . . . . . . . 120
Airbag Readiness Light . . . . . . . 121
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . 121
Charging System Light . . . . . . . 122
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . 122
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . 124
Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . 125
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . 125
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . 125
Lane Keep Assist (LKA) Light . . . . . . . . . . . . . . . . . . . . . . . . 126
Vehicle Ahead Indicator . . . . . . 126
Traction Off Light . . . . . . . . . . . . . 126
StabiliTrak OFF Light . . . . . . . . . 127
Traction Control System (TCS)/ StabiliTrak Light . . . . . . . . . . . . . 127
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . 127
Tire Pressure Light . . . . . . . . . . . 128
Engine Oil Pressure Light . . . . 128
Low Fuel Warning Light . . . . . . 129 Security Light . . . . . . . . . . . . . . . . . 129
High-Beam On Light . . . . . . . . . . 129
Adaptive Forward Lighting
(AFL) Light . . . . . . . . . . . . . . . . . . 129
Front Fog Lamp Light . . . . . . . . . 130
Lamps On Reminder . . . . . . . . . 130
Cruise Control Light . . . . . . . . . . 130
Door Ajar Light . . . . . . . . . . . . . . . 130
Information Displays
Power Flows (eAssist) . . . . . . . . 131
Energy Information
(eAssist) . . . . . . . . . . . . . . . . . . . . 131
Driver Information Center (DIC) . . . . . . . . . . . . . . . . 131
Head-Up Display (HUD) . . . . . . 134
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . 137
Engine Power Messages . . . . . 138
Vehicle Speed Messages . . . . . 138
Vehicle Personalization
Vehicle Personalization . . . . . . . 138
Universal Remote System
Universal Remote System . . . . 145
Universal Remote System Programming . . . . . . . . . . . . . . . 145
Universal Remote System Operation . . . . . . . . . . . . . . . . . . . 148

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
106 Instruments and Controls
Controls
Steering Wheel
Adjustment
To adjust the steering wheel:1. Pull the lever down.
2. Move the steering wheel up or down.
3. Pull or push the steering wheel closer or away from you.
4. Pull the lever up to lock the steering wheel in place. Do not adjust the steering wheel
while driving.
Power Tilt and Telescoping
Steering WheelTo adjust the steering wheel,
if equipped:
Press the control up or down to tilt
the steering wheel up or down.
Press the control forward or
rearward to move the steering wheel
closer or away from you.
Do not adjust the steering wheel
while driving.
Steering Wheel Controls
The infotainment system can be
operated by using the steering
wheel controls. See
“Steering Wheel
Controls” in the infotainment
manual.
Heated Steering Wheel
(: If equipped, press to turn on or
off. A light near the button displays
when the feature is turned on.
The steering wheel takes about
three minutes to start heating.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Instruments and Controls 107
Horn
Pressaon the steering wheel pad
to sound the horn.
Windshield Wiper/Washer
With the ignition on or in ACC/
ACCESSORY, move the windshield
wiper lever to select the wiper
speed.
HI : Use for fast wipes.
LO : Use for slow wipes.
INT : Use for intermittent wipes. To
adjust wipe frequency, turn the band
up for more frequent wipes or down
for less frequent wipes.
OFF : Use to turn the wipers off.
1x : For a single wipe, briefly move
the wiper lever down. For several
wipes, hold the wiper lever down.
f: Pull the windshield wiper
lever toward you to spray windshield
washer fluid and activate the wipers.
The wipers will continue until the
lever is released or the maximum
wash time is reached. When the
lever is released, additional wipes
may occur depending on how long
the windshield washer had been activated. See
Washer Fluid0252
for information on filling the
windshield washer fluid reservoir.
{Warning
In freezing weather, do not use
the washer until the windshield is
warmed. Otherwise the washer
fluid can form ice on the
windshield, blocking your vision.
Clear snow and ice from the wiper
blades before using them. If frozen
to the windshield, carefully loosen or
thaw them. Damaged blades should
be replaced. See Wiper Blade
Replacement 0256.
Heavy snow or ice can overload the
wiper motor.
Wipe Parking
If the ignition is turned off while the
wipers are on LO, HI, or INT, they
will immediately stop.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
108 Instruments and Controls
If the windshield wiper lever is then
moved to OFF before the driver
door is opened or within 10 minutes,
the wipers will restart and move to
the base of the windshield.
If the ignition is turned off while the
wipers are performing wipes due to
windshield washing, the wipers
continue to run until they reach the
base of the windshield.
Compass
The vehicle may have a compass
display on the Driver Information
Center (DIC). The compass receives
its heading and other information
from the Global Positioning
System (GPS) antenna, StabiliTrak/
Electronic Stability Control (ESC),
and vehicle speed information.
The compass system is designed to
operate for a certain number of
miles or degrees of turn before
needing a signal from the GPS
satellites. When the compass
display shows CAL, drive the
vehicle for a short distance in an
open area where it can receive aGPS signal. The compass system
will automatically determine when a
GPS signal is restored and provide
a heading again.
Clock
Setting the Time and Date
To set the time or date:
1. Select SETTINGS from the Home Page, then select Time
and Date.
2. Select the desired function.
To set the time or date, touch
«or
ªto change the hour, minutes,
AM, PM, day, month, or year.
To change the 12-24Hr setting,
touch 12-24Hr.
To turn clock display on and off,
touch Clock Display, then select Off
or On.
To turn Auto Set on and off, touch
Auto Set, then select Off or On. If auto timing is set, the time
displayed on the clock may not
update immediately when driving
into a new time zone.
Auto set requires an active OnStar
or connected service plan.
Touch
[to go to the last menu and
save the changes or
{to return to
the Home Page.
Power Outlets
Power Outlets 12-Volt Direct
Current