2013 BUICK REGAL cooling

Black plate (16,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-16 Vehicle Care
3. Disconnect the electricalconnector (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. Notice:
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 Engine
1. Engine Cooling Fans (Out of View) 2. Coolant Surge Tank and
Pressure Cap
2.4L L4 Engine without eAssist
1. Engine Cooling Fans (Out of View)
2. Coolant Surge Tank and Pressure Cap

Black plate (17,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-17
2.4L L4 Engine with eAssist
1. Engine Cooling Fans (Out of 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.
Notice: Using coolant other than
DEX-COOL
®can cause premature
engine, heater core, or radiator
corrosion. In addition, the engine
coolant could require changing
sooner, at 50 000 km (30,000 mi)
or 24 months, whichever occurs
first. Any repairs would not be
covered by the vehicle warranty.
Always use DEX-COOL
(silicate-free) coolant in the
vehicle.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL®engine
coolant. This coolant is designed to
remain in the vehicle for 5 years or
240 000 km (150,000 mi), whichever
occurs first.
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 on
page 10‑20.
What to Use
{WARNING
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
(Continued)

Black plate (18,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-18 Vehicle Care
WARNING (Continued)
mixture, the engine could get too
hot but you would not get the
overheat warning. The engine
could catch fire and you or others
could be burned. Use a 50/
50 mixture of clean, drinkable
water and DEX-COOL coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
.Gives freezing protection down
to −37°C (−34°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), engine
temperature.
.Protects against rust and
corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine
temperature.
Notice: If improper coolant
mixture, inhibitors, or additives
are used in the vehicle cooling
system, the engine could
overheat and be damaged. Too
much water in the mixture can
freeze and crack engine cooling
parts. The repairs would not be
covered by the warranty. Use only
the proper mixture of engine
coolant for the cooling system.
See Recommended Fluids and
Lubricants on page 11‑12.
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or into sewers, streams,
or bodies of water. Have the coolant
changed by an authorized service
center, familiar with legal
requirements regarding used
coolant disposal. This will help
protect the environment and your
health.Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
Check to see if coolant is visible in
the coolant surge tank. If the coolant
inside the coolant surge tank is
boiling, do not do anything else until
it cools down.
If coolant is visible but the coolant
level is not at or above the mark
pointed to, add a 50/50 mixture of
clean drinkable water and
DEX-COOL coolant.
Be sure the cooling system is cool
before this is done.

Black plate (19,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-19
If no coolant is visible in the coolant
surge tank, add coolant as follows:
How to Add Coolant to the
Coolant Surge Tank
Notice:This vehicle has a
specific coolant fill procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged.
If no problem is found, check to see
if coolant is visible in the coolant
surge tank. If coolant is visible but
the coolant level is not at the
indicated level mark, add a 50/
50 mixture of clean, drinkable water
and DEX-COOL coolant at the
coolant surge tank, but be sure the
cooling system, including the
coolant surge tank pressure cap, is
cool before you do it.
{WARNING
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. Never turn
the cap when the cooling system,
including the surge tank pressure
cap, is hot. Wait for the cooling
system and surge tank pressure
cap to cool.
Notice: In cold weather, water
can freeze and crack the engine,
radiator, heater core and other
parts. Use the recommended
coolant and the proper coolant
mixture.
{WARNING
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
2.0L L4 Engine Shown, 2.4L L4
Engine with or without eAssist Similar
1. Remove the coolant surge tank pressure cap when the cooling
system, including the coolant
surge tank pressure cap and
upper radiator hose, is no
longer hot.
Turn the pressure cap slowly
counterclockwise about
one-quarter of a turn. If you hear
a hiss, wait for that to stop. This
will allow any pressure still left to
be vented out the
discharge hose.
2. Keep turning the pressure cap slowly and remove it.

Black plate (20,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-20 Vehicle Care
3. Fill the coolant surge tank withthe proper DEX-COOL coolant
mixture to the indicated
level mark.
4. With the coolant surge tank pressure cap off, start the
engine and let it run until you
can feel the upper radiator hose
getting hot. Watch out for the
engine cooling fans.
By this time, the coolant level
inside the coolant surge tank
may be lower. If the level is
lower, add more of the proper
DEX-COOL coolant mixture to the coolant surge tank until the
level reaches the indicated
level mark.
5. Replace the pressure cap tightly.
Check the level in the coolant surge
tank when the cooling system has
cooled down. If the coolant is not at
the proper level, repeat Steps 1–
3 and reinstall the pressure cap.
If the coolant still is not at the proper
level when the system cools down
again, see your dealer.
Engine Overheating
2.0L L4 Engine
The vehicle has an engine coolant
temperature warning light and an
engine coolant temperature gauge
on the instrument panel to warn of
engine overheating. See Engine
Coolant Temperature Warning Light
on page 5‑21 andEngine Coolant
Temperature Gauge on page 5‑12. 2.4L L4 Engine with or without
eAssist
The vehicle has an engine coolant
temperature warning light on the
instrument panel to warn of engine
overheating. See
Engine Coolant
Temperature Warning Light on
page 5‑21.
If it is decided not to lift the hood
when this warning appears, but
instead get service help right away,
see Roadside Assistance Program
(Mexico) on page 13‑7 orRoadside
Assistance Program (U.S. and
Canada) on page 13‑11.
If it is decided to lift the hood, make
sure the vehicle is parked on a level
surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, both fans
should be running. If they are not,
do not continue to run the engine
and have the vehicle serviced.

Black plate (38,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-38 Vehicle Care
Fuse
Number Usage
50 Left-Hand Low Beam, High Intensity
Discharge
Headlamp
51 Horn
52 Motor Indicator Lamp
53 Inside Rearview Mirror
54 Not Used
55 Power Windows/ Mirrors
56 Windshield Washer
57 Not Used
58 Not Used
59 Secondary Air Induction (eAssist
and 2.4L Engine
RPO LEA) Fuse
Number Usage
60 Heated Mirrors
61 Not Used
62 Canister Vent Solenoid
63 Not Used
64 Heater, Ventilation, and Air Conditioning
Pump (eAssist Only)
65 Not Used
66 SAI Check Valve (eAssist Only)
67 Fuel System Control Module
68 Not Used
69 Battery Sensor
70 Not Used
71 Not Used Relay
Number Usage
1 Air Conditioning Control
2 Starter
3 Cooling Fan
4 Front Wiper (Step 2)
5 Front Wiper (Step 1, Interval)
6 SAI Valve/Heater (eAssist and 2.4L
Engine RPO LEA),
Ventilation, and Air
Conditioning Pump
(eAssist Only)
7 Main Relay
8 Not Used
9 Cooling Fan
10 Cooling Fan

Black plate (39,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-39
Relay
Number Usage
11 Transmission Auxiliary Pump
(eAssist Only)
12 Cooling Fan (2.0L Engine RPO LHU)
13 Cooling Fan
14 High Intensity Discharge Lamps
15 Ignition
16 Secondary AIR Pump (eAssist and
2.4L Engine
RPO LEA)
17 Window/Mirror DefogInstrument Panel Fuse
Block
The instrument panel fuse block is
located in the instrument panel, on
the driver side of the vehicle.
To access the fuses, open the
storage compartment. Press in on
the sides of the compartment to
release it from the instrument panel.
Pull the door toward you to release
it from the hinge.
Instrument Panel Fuse Block
Number Usage
1 Suspension Control Module/Universal
Garage Door
Opener/ESC
2 Body Control Module 1
3 Body Control Module 5
4 Radio

Black plate (61,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-61
road, the tires and wheels might
need to be rebalanced. See your
dealer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent,
cracked, or badly rusted or
corroded. If wheel nuts keep coming
loose, the wheel, wheel bolts, and
wheel nuts should be replaced.
If the wheel leaks air, replace it.
Some aluminum wheels can be
repaired. See your dealer if any of
these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the
same load-carrying capacity,
diameter, width, offset, and be
mounted the same way as the one it
replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor
System (TPMS) sensors with new
GM original equipment parts.
{WARNING
Using the wrong replacement
wheels, wheel bolts, or wheel
nuts can be dangerous. It could
affect the braking and handling of
the vehicle. Tires can lose air,
and cause loss of control, causing
a crash. Always use the correct
wheel, wheel bolts, and wheel
nuts for replacement.
Notice: The wrong wheel can
also cause problems with bearing
life, brake cooling, speedometer
or odometer calibration,
headlamp aim, bumper height,
vehicle ground clearance, and tire
or tire chain clearance to the
body and chassis.
Used Replacement Wheels
{WARNING
Replacing a wheel with a used
one is dangerous. How it has
been used or how far it has been
driven may be unknown. It could
fail suddenly and cause a crash.
When replacing wheels, use a
new GM original equipment
wheel.
Tire Chains
{WARNING
Do not use tire chains. There is
not enough clearance. Tire chains
used on a vehicle without the
proper amount of clearance can
cause damage to the brakes,
suspension, or other vehicle
(Continued)