2016 BUICK REGAL engine coolant

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
134 Instruments and Controls
unsafe temperatures for operation.
Stop and turn off the vehicle as
soon as it is safe to do so to avoid
severe damage. This message
clears when the engine has cooled
to a safe operating temperature.
HIGH COOLANT
TEMPERATURE
This message may display if the
coolant temperature is hot. See
Engine Overheating0237.
Engine Oil Messages
CHANGE ENGINE OIL SOON
This message displays when the
engine oil needs to be changed.
When you change the engine oil, be
sure to reset the Oil Life System.
See Engine Oil Life System 0230,
Driver Information Center (DIC)
(Base Level Cluster) 0125 orDriver
Information Center (DIC) (Uplevel
Cluster) 0127, Engine Oil 0228,
and Maintenance Schedule 0305.
ENGINE OIL HOT, IDLE
ENGINE
This message displays when the
engine oil temperature is too hot.
Stop and allow the vehicle to idle
until it cools down.
ENGINE OIL LOW —ADD OIL
On some vehicles, this message
may display when the engine oil
level is too low. Check the oil level.
See Engine Oil 0228.
OIL PRESSURE LOW —STOP
ENGINE
This message displays if low oil
pressure levels occur. Stop the
vehicle as soon as safely possible
and do not operate it until the cause
of the low oil pressure has been
corrected. Check the oil as soon as
possible and have the vehicle
serviced by your dealer.
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays when the
vehicle's engine power is reduced.
Reduced engine power can affect
the vehicle's ability to accelerate.
If this message is on, but there is no
reduction in performance, proceed
to your destination. The
performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven at a reduced
speed while this message is on, but
maximum acceleration and speed
may be reduced. Anytime this
message stays on, the vehicle
should be taken to your dealer for
service as soon as possible.
Fuel System Messages
FUEL LEVEL LOW
This message displays when the
vehicle is low on fuel. Refuel as
soon as possible.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Driving and Operating 181
.The air conditioning or defrost
system need the compressor to
maintain vehicle comfort. See
Dual Automatic Climate Control
System 0157. The warmer it is
outside, the shorter the time
before the engine is restarted to
provide cabin cooling. To
maximize fuel economy, use the
eco air conditioning mode.
. The shift lever is in P (Park),
N (Neutral), R (Reverse),
or M (Manual Mode).
. The high voltage battery pack
charge is low.
. The hood is not fully closed.
. Brake pedal pressure is low.
. The malfunction indicator lamp
(MIL) is on; this may prevent an
auto stop.
. High humidity is detected.
The Engine Will Restart When:
. The brake pedal is released.
. The accelerator pedal is applied.
. Shifting out of D (Drive) to any
other gear. .
The air conditioning or defrost
system need the compressor to
maintain vehicle comfort. See
Dual Automatic Climate Control
System 0157. The warmer it is
outside, the shorter the time
before the engine is restarted to
provide cabin cooling. To
maximize fuel economy, use the
eco air conditioning mode.
. The climate control system is
turned from off to normal air
conditioning or defrost. See Dual
Automatic Climate Control
System 0157.
. The engine is required to run for
either heater or climate control
performance. See Dual
Automatic Climate Control
System 0157.
. The high voltage battery pack
charge is low and requires
recharging.
. Auto stop time is greater than
two minutes.
. The hood is opened.Engine Heater
The engine coolant heater,
if available, can help in cold weather
conditions at or below −18 °C (0 °F)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting the
vehicle. An internal thermostat in
the plug-end of the cord will prevent
engine coolant heater operation at
temperatures above −18 °C (0 °F).
To Use the Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap the
electrical cord.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Vehicle Care 219
Vehicle Care
General Information
General Information . . . . . . . . . . 220
California Proposition65 Warning . . . . . . . . . . . . . . . . . 220
California Perchlorate Materials Requirements . . . . . 220
Accessories and Modifications . . . . . . . . . . . . . . . . 221
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 221
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 222
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 223
Engine Oil . . . . . . . . . . . . . . . . . . . . 228
Engine Oil Life System . . . . . . . 230
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 231
Engine Air Cleaner/Filter . . . . . . 231
Cooling System . . . . . . . . . . . . . . 233
Engine Coolant . . . . . . . . . . . . . . . 235
Engine Overheating . . . . . . . . . . 237
Washer Fluid . . . . . . . . . . . . . . . . . 239
Brakes . . . . . . . . . . . . . . . . . . . . . . . 239
Brake Fluid . . . . . . . . . . . . . . . . . . . 240
Battery - North America . . . . . . 241
All-Wheel Drive . . . . . . . . . . . . . . . 242 Starter Switch Check . . . . . . . . . 243
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 243
Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . . . 243
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 243
Wiper Blade Replacement . . . . 244
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 245
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 245
Halogen Bulbs . . . . . . . . . . . . . . . . 245
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 245
Headlamps, Front Turn Signal and Parking Lamps . . . . . . . . . 246
Fog Lamps . . . . . . . . . . . . . . . . . . . 246
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 246
License Plate Lamp . . . . . . . . . . 247
Replacement Bulbs . . . . . . . . . . . 248
Electrical System
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 248
Electrical System Overload . . . 248
Fuses and Circuit Breakers . . . 249 Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 249
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 252
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 253
All-Season Tires . . . . . . . . . . . . . . 254
Winter Tires . . . . . . . . . . . . . . . . . . 254
Summer Tires . . . . . . . . . . . . . . . . 255
Tire Sidewall Labeling . . . . . . . . 255
Tire Designations . . . . . . . . . . . . . 257
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 258
Tire Pressure . . . . . . . . . . . . . . . . . 261
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 262
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 262
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 264
Tire Inspection . . . . . . . . . . . . . . . . 267
Tire Rotation . . . . . . . . . . . . . . . . . 267
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 268
Buying New Tires . . . . . . . . . . . . . 269
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 270
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 270

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
224 Vehicle Care
1.Engine Air Cleaner/Filter 0231.
2. Engine Oil Fill Cap. See Engine Oil 0228.
3. Engine Oil Dipstick. See Engine Oil 0228.
4. Transmission Fluid Cap. See Automatic Transmission
Fluid 0231. 5. Brake Fluid Reservoir. See
Brake Fluid 0240.
6. Coolant Surge Tank and Pressure Cap. See Engine
Coolant 0235.
7. Battery (Under Cover). See Battery - North America 0241. 8.
Engine Compartment Fuse
Block 0249.
9. Windshield Washer Fluid Reservoir. See Washer
Fluid 0239.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
226 Vehicle Care
1.Engine Air Cleaner/Filter 0231.
2. Engine Cover.
3. Engine Oil Fill Cap. See Engine Oil 0228.
4. Engine Oil Dipstick. See Engine Oil 0228. 5. Transmission Fluid Cap and
Dipstick. See Automatic
Transmission Fluid 0231.
6. Brake Fluid Reservoir. See Brake Fluid 0240.
7. Coolant Surge Tank and Pressure Cap. See Engine
Coolant 0235. 8. Battery (Under Cover). See
Battery - North America 0241.
9. Engine Compartment Fuse
Block 0249.
10. Windshield Washer Fluid Reservoir. See Washer
Fluid 0239.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
228 Vehicle Care
1.Engine Air Cleaner/Filter 0231.
2. Engine Cover.
3. Engine Cooling Fans (Out of View). See Cooling
System 0233.
4. Engine Oil Fill Cap. See Engine Oil 0228.
5. Engine Oil Dipstick (Out of View). See Engine Oil0228.
6. High Voltage Cable (Orange Color).
7. Transmission Fluid Cap. See Automatic Transmission
Fluid 0231.
8. Brake Fluid Reservoir. See Brake Fluid 0240.
9. Battery (Under Cover). See Battery - North America 0241.
10. Coolant Surge Tank and Pressure Cap. See Engine
Coolant 0235.
11. Engine Compartment Fuse
Block 0249.
12. Windshield Washer Fluid Reservoir. See Washer
Fluid 0239.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 0230.
. Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
It is a good idea to check the engine
oil level at each fuel fill. In order to
get an accurate reading, the oil must be warm and the vehicle must
be on level ground. The engine oil
dipstick handle is a loop. See
Engine Compartment Overview
0
223 for the location of the engine
oil dipstick.
Obtaining an accurate oil level
reading is essential:
1. If the engine has been running recently, turn off the engine and
allow several minutes for the oil
to drain back into the oil pan.
Checking the oil level too soon
after engine shutoff will not
provide an accurate oil level
reading.
{Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.
2. Pull out the dipstick and wipe it with a clean paper towel or
cloth, then push it back in all

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Vehicle Care 233
To inspect or replace the engine air
cleaner/filter:1. Open the hood. See Hood 0222.
2. Disconnect the outlet duct by loosening the air duct
clamp (2).
3. Disconnect the electrical connector (3).
4. Remove the screws (1) on top of the engine air cleaner/filter
housing.
5. Lift the filter cover housing away from the engine air
cleaner/filter housing.
6. Pull out the filter.
7. Inspect or replace the engine air cleaner/filter.
8. Reverse Steps 2-4 to reinstall the filter cover housing.{Warning
Operating the engine with the air
cleaner/filter off can cause you or
others to be burned. The air
cleaner not only cleans the air; it
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
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 you are 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 Fans (Out
of View)
2. Coolant Surge Tank and Pressure Cap

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
234 Vehicle Care
2.4L L4 Engine without eAssist
1. Engine Cooling Fans (Outof View)
2. Coolant Surge Tank and Pressure Cap
2.4L L4 Engine with eAssist
1. Engine Cooling Fans (Outof View)
2. Coolant Surge Tank and Pressure Cap
{Warning
An electric engine cooling fan
under the hood 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
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not run the engine if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.
Caution
Using coolant other than
DEX-COOL®can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner. Any repairs
would not be covered by the
vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.