cooling BUICK LACROSSE 2019 Owner's Manual

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
16 In Brief
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.
See Windshield Wiper/Washer
0 107.
Climate Controls
Dual Automatic Climate Control System
The climate control buttons on the center stack and on the climate control
display are used to adjust the heating, cooling, and ventilation.
Center Stack Climate Controls
1. Driver and Passenger Temperature Displays
2. Driver and Passenger Temperature Controls
3. Driver and Passenger Heated and Ventilated Seats (If
Equipped)
4. Fan Controls 5. CLIMATE
6. MAX Defrost
7. Recirculation
8. Rear Window Defogger and
Heated Outside Mirrors
9. ON/OFF (Power)
10. AUTO (Automatic Operation)

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Lighting 155
voltage move up or down. This is
normal. If there is a problem, an
alert will be displayed.
The battery can be discharged at
idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fast
enough at idle to produce all of the
power needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, rear
window defogger, climate control fan
at high speed, heated seats, engine
cooling fans, trailer loads, and loads
plugged into accessory power
outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.
It can increase engine idle speed to
generate more power whenever
needed. It can temporarily reduce
the power demands of some
accessories.Normally, these actions occur in
steps or levels, without being
noticeable. In rare cases at the
highest levels of corrective action,
this action may be noticeable to the
driver. If so, a DIC message might
be displayed and it is recommended
that the driver reduce the electrical
loads as much as possible.
Battery Power Protection
The battery saver feature is
designed to protect the vehicle's
battery.
If the exterior lamps or any interior
lamp is left on and the ignition is
turned off, the battery rundown
protection system automatically
turns the lamp off after about
10 minutes.
Exterior Lighting Battery
Saver
The exterior lamps turn off about
10 minutes after the ignition is
turned off, if the parking lamps or
headlamps have been manually left
on. This protects against drainingthe battery. To restart the 10-minute
timer, turn the exterior lamp control
to the off position and then back to
the parking lamp or headlamp
position.
To keep the lamps on for more than
10 minutes, the ignition must be on
or in ACC/ACCESSORY.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Climate Controls 157
Climate Controls
Climate Control Systems
Dual Automatic ClimateControl System . . . . . . . . . . . . . 157
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 162
Maintenance
Air Intake . . . . . . . . . . . . . . . . . . . . . 163
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . 163
Service . . . . . . . . . . . . . . . . . . . . . . . 163
Climate Control Systems
Dual Automatic Climate Control System
The climate control buttons on the center stack and on the climate control
display are used to adjust the heating, cooling, and ventilation.
Center Stack Climate Controls
1. Driver and Passenger Temperature Displays
2. Driver and Passenger Temperature Controls
3. Driver and Passenger Heated and Ventilated Seats (If
Equipped) 4. Fan Controls
5. CLIMATE
6. MAX Defrost
7. Recirculation
8. Rear Window Defogger and
Heated Outside Mirrors

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Driving and Operating 169
Driving on Wet Roads
Rain and wet roads can reduce
vehicle traction and affect your
ability to stop and accelerate.
Always drive slower in these types
of driving conditions and avoid
driving through large puddles and
deep-standing or flowing water.
{Warning
Wet brakes can cause crashes.
They might not work as well in a
quick stop and could cause
pulling to one side. You could
lose control of the vehicle.
After driving through a large
puddle of water or a car/vehicle
wash, lightly apply the brake
pedal until the brakes work
normally.
Flowing or rushing water creates
strong forces. Driving through
flowing water could cause the
vehicle to be carried away. If this
happens, you and other vehicle(Continued)
Warning (Continued)
occupants could drown. Do not
ignore police warnings and be
very cautious about trying to drive
through flowing water.
Hydroplaning
Hydroplaning is dangerous. Water
can build up under the vehicle's
tires so they actually ride on the
water. This can happen if the road is
wet enough and you are going fast
enough. When the vehicle is
hydroplaning, it has little or no
contact with the road.
There is no hard and fast rule about
hydroplaning. The best advice is to
slow down when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet
weather driving tips include:
.Allow extra following distance.
. Pass with caution. .
Keep windshield wiping
equipment in good shape.
. Keep the windshield washer fluid
reservoir filled.
. Have good tires with proper
tread depth. See Tires0268.
. Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving
on flat or rolling terrain. Tips include:
.Keep the vehicle serviced and in
good shape.
. Check all fluid levels and brakes,
tires, cooling system, and
transmission.
. Shift to a lower gear when going
down steep or long hills.
{Warning
Using the brakes to slow the
vehicle on a long downhill slope
can cause brake overheating, can
(Continued)

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
230 Driving and Operating
If parking the rig on a hill:1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if
facing downhill or into traffic if
facing uphill.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, release the regular
brakes until the chocks absorb
the load.
4. Reapply the brake pedal. Then apply the parking brake and
shift into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift into a gear.
4. Release the parking brake.
5. Let up on the brake pedal.
6. Drive slowly until the trailer is clear of the chocks. 7. Stop and have someone pick
up and store the chocks.
Maintenance when Trailer
Towing
The vehicle needs service more
often when pulling a trailer. See
Maintenance Schedule 0320.
Things that are especially important
in trailer operation are automatic
transmission fluid, engine oil, axle
lubricant, belts, cooling system, and
brake system. It is a good idea to
inspect these before and during
the trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Trailer Towing
{Warning
The driver can lose control when
pulling a trailer if the correct
equipment is not used or the
vehicle is not driven properly. For
example, if the trailer is too heavy
(Continued)
Warning (Continued)
or the trailer brakes are
inadequate for the load, the
vehicle may not stop as expected.
The driver and passengers could
be seriously injured. The vehicle
may also be damaged; the
resulting repairs would not be
covered by the vehicle warranty.
Pull a trailer only if all the steps in
this section have been followed.
Ask your dealer for advice and
information about towing a trailer
with the vehicle.
Caution
Pulling a trailer improperly can
damage the vehicle and result in
costly repairs not covered by the
vehicle warranty. To pull a trailer
correctly, follow the advice in this
section and see your dealer for
important information about
towing a trailer with the vehicle.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
234 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 235
California Proposition65 Warning . . . . . . . . . . . . . . . . . 235
California Perchlorate Materials Requirements . . . . . 236
Accessories and Modifications . . . . . . . . . . . . . . . . 236
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 236
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 237
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 238
Engine Oil . . . . . . . . . . . . . . . . . . . . 241
Engine Oil Life System . . . . . . . 244
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 245
Engine Air Cleaner/Filter . . . . . . 245
Cooling System . . . . . . . . . . . . . . 246
Engine Overheating . . . . . . . . . . 250
Overheated Engine Protection Operating Mode . . . . . . . . . . . . . 252
Washer Fluid . . . . . . . . . . . . . . . . . 252
Brakes . . . . . . . . . . . . . . . . . . . . . . . 253
Brake Fluid . . . . . . . . . . . . . . . . . . . 254 Battery - North America . . . . . . 255
All-Wheel Drive . . . . . . . . . . . . . . . 256
Starter Switch Check . . . . . . . . . 256
Wiper Blade Replacement . . . . 256
Windshield Replacement . . . . . 257
Gas Strut(s) . . . . . . . . . . . . . . . . . . 257
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 258
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 258
High Intensity Discharge (HID)
Lighting . . . . . . . . . . . . . . . . . . . . . 258
LED Lighting . . . . . . . . . . . . . . . . . 259
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 259
License Plate Lamp . . . . . . . . . . 259
Electrical System
Electrical System Overload . . . 260
Fuses and Circuit Breakers . . . 261
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 261
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 265
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 268
All-Season Tires . . . . . . . . . . . . . . 268
Winter Tires . . . . . . . . . . . . . . . . . . 269 Tire Sidewall Labeling . . . . . . . . 269
Tire Designations . . . . . . . . . . . . . 271
Tire Terminology and
Definitions . . . . . . . . . . . . . . . . . . 272
Tire Pressure . . . . . . . . . . . . . . . . . 275
Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . . 276
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 276
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 277
Tire Inspection . . . . . . . . . . . . . . . . 280
Tire Rotation . . . . . . . . . . . . . . . . . 281
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 282
Buying New Tires . . . . . . . . . . . . . 282
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 284
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 284
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 286
Wheel Replacement . . . . . . . . . . 286
Tire Chains . . . . . . . . . . . . . . . . . . . 287
If a Tire Goes Flat . . . . . . . . . . . . 287
Tire Sealant and Compressor Kit . . . . . . . . . . . . . 289
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . 295
Tire Changing . . . . . . . . . . . . . . . . 296

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Vehicle Care 239
1.Engine Air Cleaner/Filter 0245.
2. Engine Oil Fill Cap. See Engine Oil 0241.
3. Engine Oil Dipstick (Out of View). See Engine Oil0241.
4. Engine Cooling Fan (Out of View). See Cooling System
0 246.
5. Brake Fluid Reservoir. See Brake Fluid 0254.
6. Power Electronics.
7. Coolant Surge Tank and Pressure Cap. See Cooling
System 0246.
8. Remote Negative (-) Battery Terminal.
See Jump Starting - North
America (with or without
eAssist) 0302 orJump Starting
- North America (On-board with
eAssist Only) 0301.
9. Windshield Washer Fluid Reservoir. See Washer Fluid
0 252.
10. Engine Compartment Fuse
Block 0261. 11. Remote Positive (+) Battery
Terminal (Under Cover).
SeeJump Starting - North
America (with or without
eAssist) 0302 orJump Starting
- North America (On-board with
eAssist Only) 0301.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Vehicle Care 241
1. Windshield Washer FluidReservoir. See Washer Fluid
0 252.
2. Engine Oil Fill Cap. See Engine Oil 0241.
3. Engine Oil Dipstick. See Engine Oil 0241.
4. Engine Cooling Fan (Out of View). See Cooling System
0 246.
5. Brake Fluid Reservoir. See Brake Fluid 0254.
6. Engine Air Cleaner/Filter 0245.
7. Coolant Surge Tank and Pressure Cap. See Cooling
System 0246.
8. Remote Positive (+) Battery Terminal (Under Cover).
See Jump Starting - North
America (with or without
eAssist) 0302 orJump Starting
- North America (On-board with
eAssist Only) 0301. 9. Remote Negative (-) Battery
Terminal.
See Jump Starting - North
America (with or without
eAssist) 0302 orJump Starting
- North America (On-board with
eAssist Only) 0301.
10. Engine Compartment Fuse
Block 0261.
Engine Oil
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
.
Use engine oil approved to the
proper specification and of the
proper viscosity grade. See
“Selecting the Right Engine Oil”
in this section.
. Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section. .
Change the engine oil at the
appropriate time. See Engine Oil
Life System 0244.
. Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially
prior to a long trip. The engine oil
dipstick handle is a loop. See
Engine Compartment Overview
0238 for the location.
{Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.
If a low oil Driver Information Center
(DIC) message displays, check the
oil level.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
246 Vehicle Care
To inspect or replace the engine air
cleaner/filter:
2.5L L4 Engine
3.6L V6 Engine
1. Remove the seven screws and lift the cover out of the
assembly.
2. Inspect or replace the engine air cleaner/filter.
3. Lower the cover and secure with the seven screws.
{Warning
Operating the engine with the air
cleaner/filter off can cause you or
others to be burned. Use caution
(Continued)
Warning (Continued)
when working on the engine. Do
not start the engine or drive the
vehicle with the air cleaner/filter
off, as flames may be present if
the engine backfires.
Caution
If the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always
have the air cleaner/filter in place
when driving.
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.

Buick LaCrosse Owner Manual (GMNA-Localizing-U.S./Canada-12032549) -
2019 - crc - 8/20/18
Vehicle Care 247
2.5L L4 Engine
1. Engine Cooling Fans (Outof View)
2. Coolant Surge Tank and Pressure Cap
3.6L V6 Engine
1. Engine Cooling Fans (Outof View)
2. Coolant Surge Tank and Pressure Cap
{Warning
An underhood electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underhood
electric fan.
{Warning
Do not touch heater or radiator
hoses, or other engine parts.
They can be very hot and can
burn you. Do not run the engine if
there is a leak; all coolant could
leak out. That could cause an
engine fire and can burn you. Fix
any leak before driving the
vehicle.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL engine
coolant. This coolant needs to be
checked and replaced at
appropriate intervals. See
Maintenance Schedule 0320.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating 0250.