fuel pressure BUICK REGAL 2015 Owner's Manual

Black plate (1,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
In Brief 1-1
In Brief
Instrument Panel
Instrument Panel . . . . . . . . . . . . . . 1-2
Initial Drive Information
Initial Drive Information . . . . . . . . 1-4
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . 1-4
Remote Vehicle Start . . . . . . . . . 1-5
Door Locks . . . . . . . . . . . . . . . . . . . 1-5
Trunk Release . . . . . . . . . . . . . . . . 1-6
Windows . . . . . . . . . . . . . . . . . . . . . . 1-6
Seat Adjustment . . . . . . . . . . . . . . 1-7
Memory Features . . . . . . . . . . . . . 1-8
Heated Seats . . . . . . . . . . . . . . . . . 1-8
Head Restraint Adjustment . . . . 1-9
Safety Belts . . . . . . . . . . . . . . . . . . . 1-9
Passenger Sensing System . . . 1-9
Mirror Adjustment . . . . . . . . . . . . 1-10
Steering Wheel Adjustment . . . . . . . . . . . . . . . . . 1-10
Interior Lighting . . . . . . . . . . . . . . 1-11
Exterior Lighting . . . . . . . . . . . . . 1-12 Windshield Wiper/Washer . . . . 1-12
Climate Controls . . . . . . . . . . . . . 1-13
Transmission . . . . . . . . . . . . . . . . 1-14
Vehicle Features
Infotainment System . . . . . . . . . 1-14
Steering Wheel Controls . . . . . 1-14
Cruise Control . . . . . . . . . . . . . . . 1-15
Driver Information
Center (DIC) . . . . . . . . . . . . . . . 1-15
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . 1-16
Lane Departure Warning (LDW) . . . . . . . . . . . . . 1-16
Lane Change Alert (LCA) . . . . 1-16
Rear Vision Camera (RVC) . . . . . . . . . . . . . 1-16
Rear Cross Traffic Alert (RCTA) System . . . . . . . . . . . . 1-16
Parking Assist . . . . . . . . . . . . . . . 1-17
Active Emergency Braking System . . . . . . . . . . . . . . . . . . . . . 1-17
Power Outlets . . . . . . . . . . . . . . . 1-17
Universal Remote System . . . 1-18
Sunroof . . . . . . . . . . . . . . . . . . . . . . 1-18
eAssist Features
eAssist®Overview . . . . . . . . . . . 1-19
High Voltage Safety Information . . . . . . . . . . . . . . . . . 1-19
Automatic Engine Start/Stop Feature . . . . . . . . . . . . . . . . . . . . . 1-20
Regenerative Braking . . . . . . . . 1-20
Battery . . . . . . . . . . . . . . . . . . . . . . . 1-20
Service . . . . . . . . . . . . . . . . . . . . . . 1-20
Performance and Maintenance
Traction Control/Electronic Stability Control . . . . . . . . . . . . 1-21
Tire Pressure Monitor . . . . . . . . 1-21
Engine Oil Life System . . . . . . 1-22
E85 or FlexFuel . . . . . . . . . . . . . . 1-22
Driving for Better Fuel Economy . . . . . . . . . . . . . . . . . . . 1-22
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . 1-23
OnStar
®. . . . . . . . . . . . . . . . . . . . . 1-23

Black plate (22,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
1-22 In Brief
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
may be an early indicator that the
tire pressures are getting low and
the tires need to be inflated to the
proper pressure.
The TPMS does not replace normal
monthly tire maintenance. Maintain
the correct tire pressures.
SeeTire Pressure Monitor System
on page 10-50.
Engine Oil Life System
The engine oil life system calculates
engine oil life based on vehicle use
and displays the CHANGE ENGINE
OIL SOON message when it is time
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change. Resetting the Oil Life 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) (Base
Level Cluster) on page 5-32 or
Driver Information Center (DIC)
(Uplevel Cluster) on page 5-35.
When remaining oil life is low,
the CHANGE ENGINE OIL
SOON message will appear on
the display. See Engine Oil
Messages on page 5-41.
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.
See Engine Oil Life System on
page 10-13.
E85 or FlexFuel
Vehicles with a yellow fuel cap can
use either unleaded gasoline or
ethanol fuel containing up to 85%
ethanol (E85). See E85 or FlexFuel
on page 9-61. For all other vehicles,
use only the unleaded gasoline
described under Fuel on page 9-59.
Driving for Better Fuel
Economy
Driving habits can affect fuel
mileage. Here are some driving tips
to get the best fuel economy
possible.
.Avoid fast starts and accelerate
smoothly.
.Brake gradually and avoid
abrupt stops.
.Avoid idling the engine for long
periods of time.
.When road and weather
conditions are appropriate, use
cruise control.

Black plate (1,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
Instruments and Controls 5-1
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . 5-2
Steering Wheel Controls . . . . . . 5-2
Heated Steering Wheel . . . . . . . 5-2
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Windshield Wiper/Washer . . . . . 5-3
Compass . . . . . . . . . . . . . . . . . . . . . 5-4
Clock . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Power Outlets . . . . . . . . . . . . . . . . . 5-5
Cigarette Lighter . . . . . . . . . . . . . . 5-6
Ashtrays . . . . . . . . . . . . . . . . . . . . . . 5-6
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . 5-7
Instrument Cluster (Base Level Cluster) . . . . . . . . . . . . . . . . . . . . . . 5-8
Instrument Cluster (Uplevel Cluster) . . . . . . . . . . . . . . . . . . . . 5-12
Speedometer . . . . . . . . . . . . . . . . 5-15
Odometer . . . . . . . . . . . . . . . . . . . . 5-15
Trip Odometer . . . . . . . . . . . . . . . 5-15
Tachometer . . . . . . . . . . . . . . . . . . 5-15 Fuel Gauge . . . . . . . . . . . . . . . . . . 5-16
Engine Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 5-17
Safety Belt Reminders . . . . . . . 5-18
Airbag Readiness Light . . . . . . 5-18
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . 5-19
Charging System Light . . . . . . 5-20
Malfunction Indicator Lamp . . . . . . . . . . . . . 5-20
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . 5-23
Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . 5-24
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . 5-24
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . 5-24
Up-Shift Light . . . . . . . . . . . . . . . . 5-25
Lane Departure Warning (LDW) Light . . . . . . . . . . . . . . . . 5-25
Vehicle Ahead Indicator . . . . . . 5-26
Traction Off Light . . . . . . . . . . . . 5-26
StabiliTrak
®OFF Light . . . . . . . 5-26
Traction Control System (TCS)/StabiliTrak
®Light . . . . 5-27
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . 5-27
Tire Pressure Light . . . . . . . . . . 5-28 Engine Oil Pressure Light . . . . 5-28
Low Fuel Warning Light . . . . . . 5-29
Security Light . . . . . . . . . . . . . . . . 5-29
High-Beam On Light . . . . . . . . . 5-29
Front Fog Lamp Light . . . . . . . . 5-29
Lamps On Reminder . . . . . . . . . 5-30
Cruise Control Light . . . . . . . . . 5-30
Door Ajar Light . . . . . . . . . . . . . . 5-30
Information Displays
Power Flows
(eAssist Only) . . . . . . . . . . . . . . 5-31
Energy Information (eAssist Only) . . . . . . . . . . . . . . 5-32
Driver Information Center (DIC) (Base Level
Cluster) . . . . . . . . . . . . . . . . . . . . 5-32
Driver Information Center (DIC) (Uplevel Cluster) . . . . . 5-35
Vehicle Messages
Vehicle Messages . . . . . . . . . . . 5-38
Battery Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . 5-38
Brake System Messages . . . . 5-39
Compass Messages . . . . . . . . . 5-39
Cruise Control Messages . . . . 5-39
Door Ajar Messages . . . . . . . . . 5-40

Black plate (34,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
5-34 Instruments and Controls
Timer:To start the timer, pressV
while this display is active. The
display will show the amount of time
that has passed since the timer was
last reset. To stop the timer, press
V
briefly while this display is active
and the timer is running. To reset
the timer to zero, press and hold
V
while this display is active.
Oil Life: Displays an estimate of
the oil's remaining useful life.
If REMAINING OIL LIFE 99% is
displayed, that means 99% of the
current oil life remains.
When the remaining oil life is low,
the CHANGE ENGINE OIL SOON
message will appear on the display.
See Engine Oil Messages on
page 5-41. The oil should be
changed as soon as possible. See
Engine Oil on page 10-11. In
addition to the engine oil life system
monitoring the oil life, additional
maintenance is recommended in the
Maintenance Schedule. See
Maintenance Schedule on
page 11-3. The Oil Life display must be reset
after each oil change. It will not
reset itself. Do not reset the Oil Life
display accidentally at any time
other than when the oil has just
been changed. It cannot be reset
accurately until the next oil change.
To reset the engine oil life system,
press and holdVfor several
seconds while the Oil Life display is
active. See Engine Oil Life System
on page 10-13.
Coolant Temperature: Displays
the coolant temperature in either
degrees Celsius (°C) or degrees
Fahrenheit (°F).
Tire Pressure: Displays the
approximate pressures of all four
tires. Tire pressure is displayed in
either kilopascal (kPa) or in pounds
per square inch (psi). If the pressure
is low, the value for that tire is
shown in amber. See Tire Pressure
Monitor System on page 10-50 and
Tire Pressure Monitor Operation on
page 10-51. Battery Voltage:
Displays the
current battery voltage. The battery
voltage can fluctuate while viewing
this information on the DIC. This is
normal.
Speed Signs: Displays sign
information, which comes from a
roadway database in the onboard
navigation.
Following Distance/Gap Setting:
When Adaptive Cruise Control
(ACC) is not engaged, the current
follow time to the vehicle ahead is
displayed as a time value on this
page. When ACC has been
engaged, the display switches to the
gap setting page. This page shows
the current gap setting. See
Forward Collision Alert (FCA)
System on page 9-52 andAdaptive
Cruise Control on page 9-40.
Drive Cycle Info (eAssist Only):
Shows the distance and fuel
economy for the current drive cycle.

Black plate (37,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
Instruments and Controls 5-37
The Oil Life display must be reset
after each oil change. It will not
reset itself. Do not reset the Oil Life
display accidentally at any time
other than when the oil has just
been changed. It cannot be reset
accurately until the next oil change.
To reset the engine oil life system,
press and hold
Vfor several
seconds while the Oil Life display is
active. See Engine Oil Life System
on page 10-13.
Tire Pressure: Displays the
approximate pressures of all four
tires. Tire pressure is displayed in
either kilopascal (kPa) or in pounds
per square inch (psi). If the pressure
is low, the value for that tire is
shown in amber. See Tire Pressure
Monitor System on page 10-50 and
Tire Pressure Monitor Operation on
page 10-51.
Fuel Economy: The right hand
side displays the best average fuel
economy (AFE) that is achieved for
a selected distance. The left hand
side displays a running average of fuel economy for the most recently
traveled selected distance. The
center bar graph displays the
instantaneous fuel economy. Press
the
Tbutton to display a page for
selecting one of the distance
options. Move the up/down arrow to
choose the selection, and
Vto
change the setting. When viewing
best AFE, a several second press
and hold of
Vwill reset the best
value. The best value will show
“- - -“ until the selected distance has
been traveled. The display provides
feedback on how current driving
behavior in the bar graph affects the
running average in the left display
and how well recent driving
compares to the best that has been
achieved.
Fuel Used and Timer: Displays
the approximate liters (L) or
gallons (gal) of fuel that have been
used since last reset. The fuel used
can be reset by pressing the
T
button while the Fuel Used display
is showing. To start the timer, press
Vwhile this
display is active. The display will
show the amount of time that has
passed since the timer was last
reset. To stop the timer, press
V
briefly while this display is active
and the timer is running. To reset
the timer to zero, press
Twhile this
display is active.
Speed Limit: Displays sign
information, which comes from a
roadway database in the onboard
navigation.
Following Distance/Gap Setting:
When Adaptive Cruise Control
(ACC) is not engaged, the current
follow time to the vehicle ahead is
displayed as a time value on this
page. When ACC has been
engaged, the display switches to the
gap setting page. This page shows
the current gap setting. See
Forward Collision Alert (FCA)
System on page 9-52 andAdaptive
Cruise Control on page 9-40.

Black plate (42,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
5-42 Instruments and Controls
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.
Key and Lock Messages
NO REMOTE DETECTED
This message displays when the
transmitter battery is weak on
vehicles with Keyless Access. See
“Starting the Vehicle with a Low
Transmitter Battery”
underRemote
Keyless Entry (RKE) System
Operation on page 2-3.
NO REMOTE KEY WAS
DETECTED PLACE KEY IN
TRANSMITTER POCKET THEN
START YOUR VEHICLE
This message displays when trying
to start the vehicle if an RKE
transmitter is not detected. The
transmitter battery may be weak.
See “Starting the Vehicle with a Low
Transmitter Battery” underRemote
Keyless Entry (RKE) System
Operation on page 2-3.
REPLACE BATTERY IN
REMOTE KEY
This message displays when the
battery in the Remote Keyless Entry
(RKE) transmitter needs to be
replaced. See “Battery
Replacement” underRemote
Keyless Entry (RKE) System
Operation on page 2-3.

Black plate (21,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
Driving and Operating 9-21
SeeDual Automatic Climate
Control System on page 8-1.
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 on page 8-1. 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 on page 8-1.
.The engine is required to run for
either heater or climate control
performance. See Dual
Automatic Climate Control
System on page 8-1.
.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.

Black plate (30,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
9-30 Driving and Operating
3 (Third), 4 (Fourth), 5 (Fifth), and
6 (Sixth):Shift into 3 (Third),
4 (Fourth), 5 (Fifth), and 6 (Sixth) the
same way you do for 2 (Second).
Slowly let up on the clutch pedal as
you press the accelerator pedal. For
the best fuel economy, use 6 (Sixth)
gear whenever vehicle speed and
driving conditions allow.
The vehicle may have an up-shift
light in the instrument cluster. See
Up-Shift Light on page 5-25.
{Warning
If you skip a gear when
downshifting, you could lose
control of the vehicle. You could
injure yourself or others. Do not
shift down more than one gear at
a time when downshifting.
{Caution
Do not rest your foot on the clutch
pedal while driving or while
stopped. The pressure can cause
premature wear in the clutch. The
repairs would not be covered by
the vehicle warranty.
To stop, let up on the accelerator
pedal and press the brake pedal.
Just before the vehicle stops, press
the clutch pedal and the brake
pedal, and shift to Neutral.
Neutral: Use this position when
you start or idle the engine. The
shift lever is in Neutral when it is
centered in the shift pattern, not in
any gear.
R (Reverse): To back up, with the
vehicle at a complete stop, press
down the clutch pedal. Then pull up
on the button on the shift lever, and
shift into R (Reverse). Let up on the
clutch pedal slowly while pressing
the accelerator pedal. If R (Reverse) gear does not engage, shift the
transmission to Neutral, release the
clutch pedal, and press it back
down. Repeat the gear selection.
{Caution
Shifting to R (Reverse) while the
vehicle is moving forward could
damage the transmission. The
repairs would not be covered by
the vehicle warranty. Shift to
R (Reverse) only after the vehicle
is stopped.
Use R (Reverse) along with the
parking brake to park the vehicle.
When operating, press the clutch
pedal down completely. Do not use
the pedal as a foot rest.

Black plate (11,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
Vehicle Care 10-11
1.Engine Air Cleaner/Filter on
page 10-16.
2. Engine Cover.
3. Engine Cooling Fans (Out of View). See Cooling System on
page 10-18.
4. Engine Oil Fill Cap. See Engine
Oil on page 10-11.
5. Engine Oil Dipstick (Out of View). See Engine Oil on
page 10-11.
6. High Voltage Cable (Orange Color).
7. Transmission Fluid Cap. See Automatic Transmission Fluid on
page 10-15.
8. Brake Master Cylinder Reservoir. See Brakes on
page 10-24.
9. Battery (Under Cover). See Battery on page 10-26.
10. Coolant Surge Tank and Pressure Cap. See Engine
Coolant on page 10-19. 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 10-13.
.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 10-6 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 (46,1)Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - CRC - 9/15/14
10-46 Vehicle Care
Accessory Weight:The
combined weight of optional
accessories. Some examples of
optional accessories are
automatic transmission, power
windows, power seats, and air
conditioning.
Aspect Ratio
:The relationship
of a tire's height to its width.
Belt
:A rubber coated layer of
cords between the plies and the
tread. Cords may be made from
steel or other reinforcing
materials.
Bead
:The tire bead contains
steel wires wrapped by steel
cords that hold the tire onto
the rim.
Bias Ply Tire
:A pneumatic tire
in which the plies are laid at
alternate angles less than
90 degrees to the centerline of
the tread. Cold Tire Pressure
:The
amount of air pressure in a tire,
measured in kPa (kilopascal)
or psi (pounds per square inch)
before a tire has built up heat
from driving. See Tire Pressure
on page 10-48.
Curb Weight
:The weight of a
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil,
and coolant, but without
passengers and cargo.
DOT Markings
:A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
Department of Transportation
(DOT) Motor Vehicle Safety
Standards. The DOT code
includes the Tire Identification
Number (TIN), an alphanumeric
designator which can also identify the tire manufacturer,
production plant, brand, and
date of production.
GVWR
:Gross Vehicle Weight
Rating. See Vehicle Load Limits
on page 9-10.
GAWR FRT
:Gross Axle Weight
Rating for the front axle. See
Vehicle Load Limits on
page 9-10.
GAWR RR
:Gross Axle Weight
Rating for the rear axle. See
Vehicle Load Limits on
page 9-10.
Intended Outboard Sidewall
:
The side of an asymmetrical tire
that must always face outward
when mounted on a vehicle.
Kilopascal (kPa)
:The metric
unit for air pressure.
Light Truck (LT-Metric) Tire
:A
tire used on light duty trucks and
some multipurpose passenger
vehicles.