2019 BUICK REGAL SPORTBACK air filter

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
Climate Controls 171
Climate Controls
Climate Control Systems
Dual Automatic ClimateControl System . . . . . . . . . . . . . 171
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 176
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . 176
Service . . . . . . . . . . . . . . . . . . . . . . . 176
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 Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
176 Climate Controls
Air Vents
Use the slider knob on the air vent
louvers to change the amount and
direction of the airflow.
To close the outboard air vents,
move the slider knob to the full
outboard position.
To close the center air vents, move
the slide knob to the full inboard
position.
To close the rear passenger air
vents, move the slider knob to the
full inboard position.Operation Tips
.
Clear away any ice, snow,
or leaves from air inlets at the
base of the windshield that could
block the flow of air into the
vehicle.
. Clear snow off the hood to
improve visibility and help
decrease moisture drawn into
the vehicle.
. Keep all outlets open whenever
possible for best system
performance.
. Keep the path under all seats
clear of objects to help circulate
the air inside the vehicle more
effectively.
. Use of non-GM approved hood
deflectors can adversely affect
the performance of the system.
Maintenance
Passenger Compartment
Air Filter
The filter removes dust, pollen, and
other airborne irritants from outside
air that is pulled into the vehicle.
The filter should be replaced as part
of routine scheduled maintenance.
See Maintenance Schedule 0336
for replacement intervals. For more
information, see your dealer.
Service
All vehicles have a label underhood
that identifies the refrigerant used in
the vehicle. The refrigerant system
should only be serviced by trained
and certified technicians. The air
conditioning evaporator should
never be repaired or replaced by
one from a salvage vehicle.
It should only be replaced by a new
evaporator to ensure proper and
safe operation.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
244 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 245
California Proposition65 Warning . . . . . . . . . . . . . . . . . 245
California Perchlorate Materials Requirements . . . . . 246
Accessories and Modifications . . . . . . . . . . . . . . . . 246
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 246
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 247
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 248
Engine Oil . . . . . . . . . . . . . . . . . . . . 251
Engine Oil Life System . . . . . . . 253
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 254
Engine Air Cleaner/Filter . . . . . . 255
Cooling System . . . . . . . . . . . . . . 256
Engine Overheating . . . . . . . . . . 260
Washer Fluid . . . . . . . . . . . . . . . . . 261
Brakes . . . . . . . . . . . . . . . . . . . . . . . 262
Brake Fluid . . . . . . . . . . . . . . . . . . . 263
Battery - North America . . . . . . 264
All-Wheel Drive . . . . . . . . . . . . . . . 265 Starter Switch Check . . . . . . . . . 265
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 265
Park Brake and P (Park)
Mechanism Check . . . . . . . . . . 265
Wiper Blade Replacement . . . . 266
Windshield Replacement . . . . . 267
Gas Strut(s) . . . . . . . . . . . . . . . . . . 267
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 268
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 269
Halogen Bulbs . . . . . . . . . . . . . . . . 269
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 269
LED Lighting . . . . . . . . . . . . . . . . . 269
Headlamps . . . . . . . . . . . . . . . . . . . 269
Fog Lamps . . . . . . . . . . . . . . . . . . . 270
Front Turn Signal Lamps . . . . . 270
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 270
Electrical System
Electrical System Overload . . . 271
Fuses and Circuit Breakers . . . 272
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 273 Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 276
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 278
All-Season Tires . . . . . . . . . . . . . . 279
Winter Tires . . . . . . . . . . . . . . . . . . 279
Low-Profile Tires . . . . . . . . . . . . . 279
Tire Sidewall Labeling . . . . . . . . 280
Tire Designations . . . . . . . . . . . . . 282
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 282
Tire Pressure . . . . . . . . . . . . . . . . . 285
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 286
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 287
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 288
Tire Inspection . . . . . . . . . . . . . . . . 291
Tire Rotation . . . . . . . . . . . . . . . . . 291
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 292
Buying New Tires . . . . . . . . . . . . . 293
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 295
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 295
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 297
Wheel Replacement . . . . . . . . . . 297

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
Vehicle Care 249
1.Engine Air Cleaner/Filter 0255.
2. Engine Oil Fill Cap. See Engine Oil 0251.
3. Engine Oil Dipstick. See Engine Oil 0251.
4. Engine Cooling Fan (Out of View). See Cooling System
0 256.
5. Brake Fluid Reservoir. See Brake Fluid 0263. 6. Battery (Under Cover). See
Battery - North America 0264.
7. Coolant Surge Tank and Pressure Cap. See Cooling
System 0256.
8. Remote Positive (+) Battery Terminal. See Jump Starting -
North America 0319. 9.
Engine Compartment Fuse
Block 0273.
10. Windshield Washer Fluid Reservoir. See Washer Fluid
0 261.
11. Remote Negative (-) Ground Terminal. See Jump Starting -
North America 0319.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
Vehicle Care 251
1. Windshield Washer FluidReservoir. See Washer Fluid
0 261.
2. Engine Oil Fill Cap. See Engine Oil 0251.
3. Engine Oil Dipstick. See Engine Oil 0251.
4. Engine Cooling Fans (Out of View). See Cooling System
0 256
5. Brake Fluid Reservoir. See Brake Fluid 0263.
6. Engine Air Cleaner/Filter 0255.
7. Coolant Surge Tank and Pressure Cap. See Cooling
System 0256.
8. Remote Positive (+) Battery Terminal. See Jump Starting -
North America 0319.
9. Engine Compartment Fuse
Block 0273.
10. Remote Negative (-) Ground Terminal. See Jump Starting -
North America 0319.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 0253.
. 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
0248 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.
Follow these guidelines:
. To get an accurate reading, park
the vehicle on level ground.
Check the engine oil level after
the engine has been off for at
least two hours. Checking the
engine oil level on steep grades
or too soon after engine shutoff
can result in incorrect readings.
Accuracy improves when

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
254 Vehicle Care
When the system has calculated
that oil life has been diminished, it
indicates that an oil change is
necessary. A CHANGE ENGINE
OIL SOON message comes on.
Change the oil as soon as possible
within the next 1 000 km (600 mi).
It is possible that, if driving under
the best conditions, the oil life
system may indicate that an oil
change is not necessary for up to a
year. The engine oil and filter must
be changed at least once a year
and at this time the system must be
reset. Your dealer has trained
service people who will perform this
work and reset the system. It is also
important to check the oil regularly
over the course of an oil drain
interval and keep it at the proper
level.
If the system is ever reset
accidentally, the oil must be
changed at 5 000 km (3,000 mi)
since the last oil change.
Remember to reset the oil life
system whenever the oil is changed.How to Reset the Engine Oil
Life System
Reset the system whenever the
engine oil is changed so that the
system can calculate the next
engine oil change. To reset the
system:1. Using the DIC controls on the right side of the steering wheel,
display REMAINING OIL LIFE
on the DIC. See Driver
Information Center (DIC) 0144.
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. The system is reset when the
CHANGE ENGINE OIL SOON
message is off.
If the CHANGE ENGINE OIL SOON
message comes back on when the
vehicle is started, the engine oil life
system has not been reset. Repeat
the procedure.
Automatic Transmission
Fluid
How to Check Automatic
Transmission Fluid
It is not necessary to check the
transmission fluid level.
A transmission fluid leak is the only
reason for fluid loss. If a leak
occurs, take the vehicle to your
dealer and have it repaired as soon
as possible.
Caution
Use of the incorrect automatic
transmission fluid may damage
the vehicle, and the damage may
(Continued)

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
Vehicle Care 255
Caution (Continued)
not be covered by the vehicle
warranty. Always use the correct
automatic transmission fluid. See
Recommended Fluids and
Lubricants0345.
There is a special procedure for
checking and changing the
transmission fluid. Because this
procedure is difficult, you should
have this done at your dealer.
Contact your dealer for additional
information. The procedure can be
found in the service manual. To
purchase a service manual, see
Publication Ordering Information
0 361.
Change the fluid at the intervals
listed in Maintenance Schedule
0 336, and be sure to use the fluid
listed in Recommended Fluids and
Lubricants 0345.
Engine Air Cleaner/Filter
See Engine Compartment Overview
0 248 for the location of the engine
air cleaner/filter.
When to Inspect the Engine Air
Cleaner/Filter
For intervals on changing and
inspecting the engine air cleaner/
filter, see Maintenance Schedule
0 336.
How to Inspect the Engine Air
Cleaner/Filter
Do not start the engine or have the
engine running with the engine air
cleaner/filter housing open. Before
removing the engine air cleaner/
filter, make sure that the engine air
cleaner/filter housing and nearby
components are free of dirt and
debris. Remove the engine air
cleaner/filter. Lightly tap and shake
the engine air cleaner/filter (away
from the vehicle), to release loose
dust and dirt. Inspect the engine air
cleaner/filter for damage, and
replace if damaged. Do not clean the engine air cleaner/filter or
components with water or
compressed air.2.0L L4 Turbo Engine
To inspect or replace the engine air
cleaner/filter: 1. Remove the six screws on top of the engine air cleaner/filter
housing.
2. Lift the filter cover housing away from the air cleaner/filter
housing.
3. Pull out the filter.
4. Inspect or replace the engine air cleaner/filter.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-12163021) -
2019 - CRC - 11/14/18
256 Vehicle Care
5. Reverse Steps 1–3 to reinstallthe filter cover housing.
3.6L V6 Engine
To inspect or replace the engine air
cleaner/filter: 1. Remove the seven screws on top of the engine air cleaner/
filter housing.
2. Lift the filter cover housing away from the engine air
cleaner/filter housing.
3. Pull out the filter.
4. Inspect or replace the engine air cleaner/filter. 5. Reverse Steps 1–3 to reinstall
the filter cover housing.
{Warning
Operating the engine with the air
cleaner/filter off can cause you or
others to be burned. Use caution
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.
When it is safe to lift the hood:
2.0L L4 Turbo Engine
1. Engine Cooling Fan (Out
of View)
2. Coolant Surge Tank and Pressure Cap