brake BUICK REGAL 2013 Service Manual

Black plate (43,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Driving and Operating 9-43
Each time this is done, the
vehicle goes about 1.6 km/h
(1 mph) slower.
Passing Another Vehicle While
Using Cruise Control
Use the accelerator pedal to
increase the vehicle's speed. When
you take your foot off the pedal, the
vehicle will slow down to the
previous set cruise control speed.
Using Cruise Control on Hills
How well the cruise control works
on hills depends upon the vehicle's
speed, load, and the steepness of
the hills. When going up steep hills,
you might have to step on the
accelerator pedal to maintain the
vehicle's speed. When going
downhill, you might have to brake or
shift to a lower gear to maintain the
vehicle's speed. When the brakes
are applied, the cruise control
shuts off. Ending Cruise Control
There are three ways to end cruise
control:
.To disengage cruise control,
step lightly on the brake pedal or
clutch; when cruise control
disengages, the indicator light
will not be lit.
.Press*on the steering wheel.
.To turn off the cruise control,
press
1on the steering wheel.
Erasing Speed Memory
The cruise control set speed is
erased from memory by pressing
1
or if the ignition is turned off.
Object Detection
Systems
Ultrasonic Parking Assist
If available, the Ultrasonic Front and
Rear Parking Assist (UFRPA) or
Ultrasonic Rear Parking Assist
(URPA) system assists the driver
with parking and avoiding objects.
At speeds less than 8 km/h (5 mph),
the system detects objects up to
1.5 m (5 ft) behind the vehicle, and
at least 25 cm (10 in) off the ground.
If the vehicle has the UFRPA
system, it also detects objects 1.2 m
(4 ft) in front of the vehicle.
{WARNING
The parking assist system does
not detect children, pedestrians,
bicyclists, animals, or objects
located below the bumper or that
are too close or too far from the
vehicle. It is not available at (Continued)

Black plate (45,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Driving and Operating 9-45
When the System Does Not
Seem to Work Properly
The following messages may be
displayed on the DIC:
SERVICE PARK ASSIST:If this
message occurs, check the
following conditions:
.The ultrasonic sensors are not
clean. Keep the vehicle's rear
bumper free of mud, dirt, snow,
ice, and slush. For cleaning
instructions, see Exterior Care
on page 10‑92.
.The park assist sensors are
covered by frost or ice. Frost or
ice can form around and behind
the sensors and may not always
be seen; this can occur after
washing the vehicle in cold
weather. The message may not
clear until the frost or ice has
melted.
If the above conditions do not exist,
take the vehicle to your dealer to
repair the system. PARK ASSIST OFF:
If the system
does not activate due to a
temporary condition, this message
displays. This can occur under the
following conditions:
.The driver has disabled the
system.
.An object was hanging out of the
trunk during the last drive cycle.
Once the object is removed, the
system will return to normal
operation.
.The bumper is damaged. Take
the vehicle to your dealer to
repair the system.
.Other conditions, such as
vibrations from a jackhammer or
the compression of air brakes on
a very large truck, are affecting
system performance.
Fuel
Use of the recommended fuel is an
important part of the proper
maintenance of this vehicle. To help
keep the engine clean and maintain
optimum vehicle performance, we
recommend the use of gasoline
advertised as TOP TIER Detergent
Gasoline.
Look for the TOP TIER label on the
fuel pump to ensure gasoline meets
enhanced detergency standards
developed by auto companies. A list
of marketers providing TOP TIER
Detergent Gasoline can be found at
www.toptiergas.com. TOP TIER
gasoline is only available in the U.S.
and Canada.

Black plate (1,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-2
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-3
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 10-3
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-5
Engine Oil . . . . . . . . . . . . . . . . . . 10-10
Engine Oil Life System . . . . . 10-12
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-13
Manual Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-14
Hydraulic Clutch . . . . . . . . . . . . 10-14
Engine Air Cleaner/Filter . . . . 10-14
Cooling System . . . . . . . . . . . . 10-16
Engine Coolant . . . . . . . . . . . . . 10-17
Engine Overheating . . . . . . . . 10-20 Power Steering Fluid (2.0L
L4 Engine) . . . . . . . . . . . . . . . . 10-22
Power Steering Fluid (2.4L L4 Engine with or without
eAssist) . . . . . . . . . . . . . . . . . . . 10-23
Washer Fluid . . . . . . . . . . . . . . . 10-23
Brakes . . . . . . . . . . . . . . . . . . . . . 10-23
Brake Fluid . . . . . . . . . . . . . . . . . 10-24
Battery . . . . . . . . . . . . . . . . . . . . . 10-26
Starter Switch Check . . . . . . . 10-27
Automatic Transmission Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . 10-27
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . 10-28
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-28
Wiper Blade Replacement . . . . . . . . . . . . . . 10-28
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-29
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-30
Halogen Bulbs . . . . . . . . . . . . . . 10-30
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . 10-30 Headlamps, Front Turn
Signal and Parking
Lamps . . . . . . . . . . . . . . . . . . . . 10-30
Fog Lamps . . . . . . . . . . . . . . . . . 10-32
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . 10-32
License Plate Lamp . . . . . . . . 10-33
Replacement Bulbs . . . . . . . . . 10-33
Electrical System
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . 10-34
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-34
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-35
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-35
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-39
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-41
All-Season Tires . . . . . . . . . . . . 10-42
Winter Tires . . . . . . . . . . . . . . . . 10-42
Summer Tires . . . . . . . . . . . . . . 10-42
Tire Sidewall Labeling . . . . . . 10-43
Tire Designations . . . . . . . . . . . 10-45

Black plate (3,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-3
cause cancer and birth defects or
other reproductive harm. Engine
exhaust, many parts and systems,
many fluids, and some component
wear by-products contain and/or
emit these chemicals.
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag
initiators, safety belt pretensioners,
and lithium batteries contained in
Remote Keyless Entry transmitters,
may contain perchlorate materials.
Special handling may be necessary.
For additional information, see
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and
Modifications
Adding non‐dealer accessories or
making modifications to the vehicle
can affect vehicle performance and
safety, including such things as
airbags, braking, stability, ride andhandling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. These accessories or
modifications could even cause
malfunction or damage not covered
by the vehicle warranty.
Damage to vehicle components
resulting from modifications or the
installation or use of non‐GM
certified parts, including control
module or software modifications, is
not covered under the terms of the
vehicle warranty and may affect
remaining warranty coverage for
affected parts.
GM Accessories are designed to
complement and function with other
systems on the vehicle. See your
dealer to accessorize the vehicle
using genuine GM Accessories
installed by a dealer technician.
Also, see
Adding Equipment to the
Airbag-Equipped Vehicle on
page 3‑27.
Vehicle Checks
Doing Your Own
Service Work
eAssist Vehicles Only
{WARNING
Never try to do your own service
on eAssist components. You can
be injured and the vehicle can be
damaged if you try to do your own
service work. Service and repair
of these eAssist components
should only be performed by a
trained service technician with the
proper knowledge and tools.

Black plate (6,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-6 Vehicle Care
1.Engine Air Cleaner/Filter on
page 10‑14.
2. Engine Cover.
3. Engine Oil Dipstick. See Engine
Oil on page 10‑10.
4. Engine Oil Fill Cap. See Engine
Oil on page 10‑10.
5. Transmission Fluid Cap and Dipstick. See Automatic
Transmission Fluid on
page 10‑13.
6. Power Steering Fluid Reservoir and Cap. See Power Steering
Fluid (2.0L L4 Engine) on
page 10‑22 orPower Steering
Fluid (2.4L L4 Engine with or
without eAssist) on page 10‑23. 7. Brake Master Cylinder and
Hydraulic Clutch Reservoir (if
equipped with manual
transmission). See Brakes on
page 10‑23 orHydraulic Clutch
on page 10‑14.
8. Battery Cover. See Battery on
page 10‑26.
9. Coolant Surge Tank and Pressure Cap. See Engine
Coolant on page 10‑17.
10. Windshield Washer Fluid Reservoir. See Washer Fluid
on page 10‑23.
11. Engine Compartment Fuse
Block on page 10‑35.

Black plate (8,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-8 Vehicle Care
1.Engine Air Cleaner/Filter on
page 10‑14.
2. Engine Cover.
3. Engine Oil Fill Cap. See Engine
Oil on page 10‑10.
4. Engine Oil Dipstick. See Engine
Oil on page 10‑10.
5. Transmission Fluid Cap and Dipstick. See Automatic
Transmission Fluid on
page 10‑13.
6. Brake Master Cylinder Reservoir. See Brakes on
page 10‑23. 7. Coolant Surge Tank and
Pressure Cap. See Engine
Coolant on page 10‑17.
8. Battery Cover. See Battery on
page 10‑26.
9. Engine Compartment Fuse
Block on page 10‑35.
10. Windshield Washer Fluid Reservoir. See Washer Fluid
on page 10‑23.

Black plate (10,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-10 Vehicle Care
1.Engine Air Cleaner/Filter on
page 10‑14.
2. Engine Cover.
3. Engine Cooling Fans (Out of View). See Cooling System on
page 10‑16.
4. Engine Oil Fill Cap. See Engine
Oil on page 10‑10.
5. Engine Oil Dipstick (Out of View). See Engine Oil on
page 10‑10.
6. High Voltage Cable (Orange Color).
7. Transmission Fluid Cap. See Automatic Transmission Fluid on
page 10‑13.
8. Brake Master Cylinder Reservoir. See Brakes on
page 10‑23.
9. Battery (Under Cover). See Battery on page 10‑26.
10. Coolant Surge Tank and Pressure Cap. See Engine
Coolant on page 10‑17. 11.
Engine Compartment Fuse
Block on page 10‑35.
12. Windshield Washer Fluid Reservoir. See Washer Fluid
on page 10‑23.
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:
.Always 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 on page 10‑12.
.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 on
page 10‑5 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.

Black plate (14,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-14 Vehicle Care
purchase a service manual, see
Service Publications Ordering
Information on page 13‑16.
Change the fluid and filter at the
intervals listed inMaintenance
Schedule on page 11‑3, and be sure
to use the fluid listed in
Recommended Fluids and
Lubricants on page 11‑12.
Manual Transmission
Fluid
It is not necessary to check the
manual 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. See Recommended
Fluids and Lubricants on page 11‑12
for the proper fluid to use.
Hydraulic Clutch
For vehicles with a manual
transmission, it is not necessary to
regularly check brake/clutch fluid
unless there is a leak suspected. Adding fluid will not correct a leak.
A fluid loss in this system could
indicate a problem. Have the
system inspected and repaired.
When to Check and What
to Use
The brake/hydraulic clutch fluid
reservoir cap has this symbol on it.
The common hydraulic clutch and
brake master cylinder fluid reservoir
is filled with DOT 3 brake fluid as
indicated on the reservoir cap. See
Engine Compartment Overview on
page 10‑5
for reservoir location.
How to Check and Add Fluid
Visually check the brake/clutch fluid
reservoir to make sure the fluid level
is at the MIN (minimum) line on the side of the reservoir. The brake/
hydraulic clutch fluid system should
be closed and sealed.
Do not remove the cap to check the
fluid level or to top off the fluid level.
Remove the cap only when
necessary to add the proper fluid
until the level reaches the MIN line.
Engine Air Cleaner/Filter
See
Engine Compartment Overview
on page 10‑5 for the location of the
engine air cleaner/filter.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the
scheduled maintenance intervals
and replace it at the first oil change
after each 80 000 km (50,000 mi)
interval. See Maintenance Schedule
on page 11‑3 for more information.
If you are driving in dusty/dirty
conditions, inspect the filter at each
engine oil change.

Black plate (23,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
Vehicle Care 10-23
What to Use
To determine what kind of fluid to
use, seeRecommended Fluids and
Lubricants on page 11‑12. Always
use the proper fluid.
Power Steering Fluid
(2.4L L4 Engine with or
without eAssist)
The vehicle has electric power
steering and does not use power
steering fluid.
Washer Fluid
What to Use
When windshield washer fluid is
needed, be sure to read the
manufacturer's instructions before
use. If operating the vehicle in an
area where the temperature may fall
below freezing, use a fluid that has
sufficient protection against
freezing.
Adding Washer Fluid
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. See Engine
Compartment Overview on
page 10‑5 for reservoir location.
Notice
.When using concentrated
washer fluid, follow the
manufacturer instructions for
adding water.
.Do not mix water with
ready-to-use washer fluid.
Water can cause the solution
to freeze and damage the
washer fluid tank and other
parts of the washer system.
.Fill the washer fluid tank only
three-quarters full when it is
very cold. This allows for
fluid expansion if freezing
occurs, which could damage
the tank if it is
completely full.
.Do not use engine coolant
(antifreeze) in the windshield
washer. It can damage the
windshield washer system
and paint.
Brakes
This vehicle has disc brakes. Disc
brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake pads
are worn and new pads are needed.
The sound can come and go or be
heard all the time the vehicle is
moving, except when applying the
brake pedal firmly.

Black plate (24,1)Buick Regal Owner Manual - 2013 - crc - 11/5/12
10-24 Vehicle Care
{WARNING
The brake wear warning sound
means that soon the brakes will
not work well. That could lead to
a crash. When the brake wear
warning sound is heard, have the
vehicle serviced.
Notice: Continuing to drive with
worn-out brake pads could result
in costly brake repair.
Some driving conditions or climates
can cause a brake squeal when the
brakes are first applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent brake
pulsation. When tires are rotated,
inspect brake pads for wear and
evenly tighten wheel nuts in the
proper sequence to torque
specifications in Capacities and
Specifications on page 12‑2. Brake linings should always be
replaced as complete axle sets.Brake Pedal Travel
See your dealer if the brake pedal
does not return to normal height,
or if there is a rapid increase in
pedal travel. This could be a sign
that brake service might be
required.
Brake Adjustment
Every time the brakes are applied,
with or without the vehicle moving,
the brakes adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is
complex. Its many parts have to be
of top quality and work well together
if the vehicle is to have really good
braking. The vehicle was designed
and tested with top-quality brake
parts. When parts of the braking
system are replaced, be sure to get
new, approved replacement parts.
If this is not done, the brakes might
not work properly. For example,installing disc brake pads that are
wrong for the vehicle, can change
the balance between the front and
rear brakes
—for the worse. The
braking performance expected can
change in many other ways if the
wrong replacement brake parts are
installed.
Brake Fluid
The brake/clutch master cylinder
reservoir is filled with DOT 3 brake
fluid as indicated on the reservoir
cap. See Engine Compartment
Overview on page 10‑5 for the
location of the reservoir.