2020 BUICK REGAL automatic transmission

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
6 Introduction
1.Air Vents 0161.
2. Turn and Lane-Change Signals
0150.
3. Instrument Cluster 0107.
Driver Information Center (DIC)
Display. See Driver Information
Center (DIC) 0128.
4. Windshield Wiper/Washer
0100.
5. Hazard Warning Flashers
0150.
6. Light Sensor. See Automatic
Headlamp System 0148.
7. Infotainment 0155.
8. Traction Control/Electronic
Stability Control 0191.
9. Dual Automatic Climate Control
System 0156.
10. Transmitter Pocket. See Remote Keyless Entry (RKE)
System Operation 08. 11.
Lane Keep Assist (LKA) 0215
(If Equipped).
Park Assist Button (If
Equipped). See Driver
Assistance Systems 0203.
Selective Ride Control (GS
Models Only) 0192.
12. Wireless Charging 0103 (If
Equipped).
13. Shift Lever. See Automatic
Transmission 0184.
14. Electric Parking Brake 0188.
15. ENGINE START/STOP Button (Out of View). See Ignition
Positions 0176.
16. Steering Wheel Controls 0100.
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC) 0128.
17. Horn 0100.
18. Steering Wheel Adjustment
0100 (Out of View). 19.
Cruise Control 0194 (If
Equipped).
Adaptive Cruise Control 0196
(If Equipped).
Forward Collision Alert (FCA)
System 0207 (If Equipped).
Heated Steering Wheel 0100
(If Equipped).
20. Hood Release. See Hood
0 233.
21. Exterior Lamp Controls 0147.
Fog Lamps 0150.
22. Instrument Panel Fuse Block Cover. See Instrument Panel
Fuse Block 0263.
23. Data Link Connector (DLC) (Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0119.
24. Head-Up Display (HUD) 0133
(If Equipped).
25. Instrument Panel Illumination
Control 0151.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
20 Keys, Doors, and Windows
If a vehicle door is unlocked, and
then opened and closed, the doors
will lock either when your foot is
removed from the brake or the
vehicle speed becomes faster than
13 km/h (8 mph).
To unlock the doors:
.Press
Kon a power door lock
switch.
. Shift the transmission into
P (Park).
Automatic Door Unlock can be
programmed. See “Power Door
Locks" in Vehicle Personalization
0 138.
Lockout Protection
When locking is requested with the
driver door open and the vehicle is
on or in ACC/ACCESSORY, all the
doors will lock and then the driver
door will unlock.
If the vehicle is off and locking is
requested while a door is open,
when all doors are closed the
vehicle will check for RKE
transmitters inside. If an RKE transmitter is detected and the
number of RKE transmitters inside
has not reduced, the driver door will
unlock and the horn will sound three
times.
This can be manually overridden by
pressing and holding
Qon the
power door lock switch.
Open Door Anti-Lockout
If Open Door Anti-Lockout is turned
on and the vehicle is off, the driver
door is open, and locking is
requested, all the doors will lock and
the driver door will remain open.
The Open Door Anti-Lockout feature
can be turned on or off. See Vehicle
Personalization 0138.
Safety Locks
The rear door safety locks prevent
passengers from opening the rear
doors from inside the vehicle.
Manual Safety Locks
The safety lock is on the inside
edge of the rear doors. To use the
safety lock:
1. Move the lever down to the lock position.
2. Close the door.
3. Do the same for the other rear door.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 7/1/19
Lighting 149
There is a light sensor on top of the
instrument panel. Do not cover the
sensor; otherwise the headlamps
will come on when they are not
needed.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.
When it is bright enough outside,
the headlamps will turn off or may
change to Daytime Running
Lamps (DRL).
The automatic headlamp system
turns off when the exterior lamp
control is turned to
Oor the ignition
is off.
Adaptive Forward
Lighting (AFL)
If equipped, the AFL pivots the
headlamps horizontally to provide
greater road illumination while
turning. To enable AFL, set the
exterior lamp control to the AUTO
position. Moving the switch out of
the AUTO position deactivates the
system. AFL operates when the
vehicle speed is greater than 3 km/h
(2 mph). AFL does not operate
when the transmission is in
R (Reverse). AFL is not immediately
operable after starting the vehicle;
driving a short distance is required
to calibrate the AFL. See Exterior
Lamp Controls 0147.
LED Headlamp System
This system automatically controls
the LED headlamps light intensity
and distribution based on the
lighting condition, road type, and
driving situation. The vehicle adapts
the headlamps automatically to
enable optimal lighting while driving.
The Intelligent Light Distribution
feature can be enabled or disabled. See
“Adaptive Forward Lighting”
under Vehicle Personalization
0 138.
The following lighting functions are
available when the exterior lamp
control is in the AUTO or
5
position.
Curve Lighting
Certain LEDs turn on automatically
to improve lighting in curves. This is
based on the steering wheel
position and vehicle speeds from
40 km/h (25 mph) to 70 km/h
(43 mph).
Corner Lighting
If equipped with cornering lamps,
certain LEDs automatically come on
when all of the following occur:
. The turn signals are activated or
the steering wheel is at a
calibrated angle.
. The vehicle is traveling up to a
speed of 40 km/h (25 mph).

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
Driving and Operating 163
Driving and
Operating
Driving Information
Driving for Better FuelEconomy . . . . . . . . . . . . . . . . . . . . 164
Distracted Driving . . . . . . . . . . . . 164
Defensive Driving . . . . . . . . . . . . . 165
Drunk Driving . . . . . . . . . . . . . . . . . 165
Control of a Vehicle . . . . . . . . . . . 166
Braking . . . . . . . . . . . . . . . . . . . . . . . 166
Steering . . . . . . . . . . . . . . . . . . . . . . 166
Off-Road Recovery . . . . . . . . . . . 167
Loss of Control . . . . . . . . . . . . . . . 168
Driving on Wet Roads . . . . . . . . 168
Hill and Mountain Roads . . . . . 169
Winter Driving . . . . . . . . . . . . . . . . 170
If the Vehicle Is Stuck . . . . . . . . 171
Vehicle Load Limits . . . . . . . . . . . 171
Starting and Operating
New Vehicle Break-In . . . . . . . . . 175
Ignition Positions . . . . . . . . . . . . . 176
Starting the Engine . . . . . . . . . . . 177
Stop/Start System . . . . . . . . . . . . 178
Engine Heater . . . . . . . . . . . . . . . . 179
Retained Accessory Power (RAP) . . . . . . . . . . . . . . . . 181 Shifting Into Park . . . . . . . . . . . . . 181
Shifting out of Park . . . . . . . . . . . 182
Parking over Things
That Burn . . . . . . . . . . . . . . . . . . . 182
Active Fuel Management . . . . . 182
Extended Parking . . . . . . . . . . . . 183
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . 183
Running the Vehicle While
Parked . . . . . . . . . . . . . . . . . . . . . . 184
Automatic Transmission
Automatic Transmission . . . . . . 184
Manual Mode . . . . . . . . . . . . . . . . . 186
Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . . 187
Brakes
Antilock BrakeSystem (ABS) . . . . . . . . . . . . . . . 188
Electric Parking Brake . . . . . . . . 188
Brake Assist . . . . . . . . . . . . . . . . . . 190
Hill Start Assist (HSA) . . . . . . . . 190
Ride Control Systems
Traction Control/Electronic Stability Control . . . . . . . . . . . . . 191
Selective Ride Control (GS Models Only) . . . . . . . . . . . . . . . . 192
Cruise Control
Cruise Control . . . . . . . . . . . . . . . . 194
Adaptive Cruise Control . . . . . . 196
Driver Assistance Systems
Driver Assistance Systems . . . 203
Assistance Systems forParking or Backing . . . . . . . . . . 204
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . 207
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . 207
Automatic Emergency Braking (AEB) . . . . . . . . . . . . . . . 209
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . 210
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . . . . 213
Lane Change Alert (LCA) . . . . . 213
Lane Keep Assist (LKA) . . . . . . 215
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . 217
Recommended Fuel (2.0L Turbo Engine) . . . . . . . . . . . . . . . 217
Recommended Fuel (3.6L Engine) . . . . . . . . . . . . . . . . . . . . . 217
Prohibited Fuels . . . . . . . . . . . . . . 218
Fuels in Foreign Countries . . . 218
Fuel Additives . . . . . . . . . . . . . . . . 218
Filling the Tank . . . . . . . . . . . . . . . 218

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
178 Driving and Operating
Caution
Do not try to shift to P (Park) if the
vehicle is moving. If you do, you
could damage the transmission.
Shift to P (Park) only when the
vehicle is stopped.
Starting Procedure
1. With the Keyless Accesssystem, the RKE transmitter
must be in the vehicle. Press
ENGINE START/STOP with the
brake pedal applied. When the
engine begins cranking, let go
of the button.
The idle speed will go down as
the engine gets warm. Do not
race the engine immediately
after starting it.
If the RKE transmitter is not in
the vehicle, if there is
interference, or if the RKE
battery is low, the Driver
Information Center (DIC) will display a message. See
Remote Keyless Entry (RKE)
System Operation
08.
Caution
Cranking the engine for long
periods of time, by pressing
ENGINE START/STOP
immediately after cranking has
ended, can overheat and damage
the cranking motor, and drain the
battery. Wait at least 15 seconds
between each try, to let the
cranking motor cool down.
2. If the engine does not start after five to 10 seconds,
especially in very cold weather
(below −18 °C or 0 °F), it could
be flooded with too much
gasoline. Try pushing the
accelerator pedal all the way to
the floor and holding it there as
you press ENGINE START/
STOP, for up to a maximum of
15 seconds. Wait at least
15 seconds between each try,
to allow the cranking motor to cool down. When the engine
starts, let go of the button and
the accelerator. If the vehicle
starts briefly but then stops
again, do the same thing. This
clears the extra gasoline from
the engine. Do not race the
engine immediately after
starting it. Operate the engine
and transmission gently until
the oil warms up and lubricates
all moving parts.
Stop/Start System
This vehicle has a Stop/Start
system to shut off the engine to help
conserve fuel. It has components
designed for the increased number
of starts.
{Warning
The automatic engine Stop/Start
feature causes the engine to shut
off while the vehicle is still on. Do
not exit the vehicle before shifting
to P (Park). The vehicle may
(Continued)

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
Driving and Operating 179
Warning (Continued)
restart and move unexpectedly.
Always shift to P (Park), and then
turn the ignition off before exiting
the vehicle.
Auto Engine Stop/Start
When the brakes are applied and
the vehicle is at a complete stop,
the engine may turn off. When
stopped, the tachometer displays
AUTO STOP. See Tachometer
0 113. When the brake pedal is
released or the accelerator pedal is
pressed, the engine will restart.
To maintain vehicle performance,
other conditions may cause the
engine to automatically restart
before the brake pedal is released.
Auto Stops may not occur and/or
auto restarts may occur because:
. The climate control settings
require the engine to be running
to cool or heat the vehicle
interior. .
The vehicle battery charge
is low.
. The vehicle battery has recently
been disconnected.
. Minimum vehicle speed has not
been reached since the last
Auto Stop.
. The accelerator pedal is
pressed.
. The engine or transmission is
not at the required operating
temperature.
. The outside temperature is not
in the required operating range.
. The vehicle is in any gear other
than D (Drive).
. Tow/Haul Mode or other driver
modes have been selected.
. The vehicle is on a steep hill or
grade.
. The driver door has been
opened or driver seat belt has
been unbuckled.
. The hood has been opened. .
The Auto Stop has reached the
maximum allowed time.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-13557849) -
2020 - CRC - 6/25/19
184 Driving and Operating
Warning (Continued)
.There are holes or openings
in the vehicle body from
damage or aftermarket
modifications that are not
completely sealed.
If unusual fumes are detected or
if it is suspected that exhaust is
coming into the vehicle: . Drive it only with the
windows completely down.
. Have the vehicle repaired
immediately.
Never park the vehicle with the
engine running in an enclosed
area such as a garage or a
building that has no fresh air
ventilation.
Running the Vehicle
While Parked
It is better not to park with the
engine running.
If the vehicle is left with the engine
running, follow the proper steps to
be sure the vehicle will not move.
See Shifting Into Park 0181 and
Engine Exhaust 0183.
Automatic
Transmission
The mode or selected gear is shown
in the instrument cluster.
P : This position locks the drive
wheels. It is the best position to use
when starting the engine because
the vehicle cannot move easily.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
186 Driving and Operating
Warning (Continued)
vehicle could move very rapidly.
You could lose control and hit
people or objects. Do not shift
into a drive gear while the engine
is running at high speed.
Caution
Shifting out of P (Park) or
N (Neutral) with the engine
running at high speed may
damage the transmission. The
repairs would not be covered by
the vehicle warranty. Be sure the
engine is not running at high
speed when shifting the vehicle.
Caution
A transmission hot message may
display if the automatic
transmission fluid is too hot.(Continued)
Caution (Continued)
Driving under this condition can
damage the vehicle. Stop and idle
the engine to cool the automatic
transmission fluid. This message
clears when the transmission fluid
has cooled sufficiently.
D : This position is for normal
driving. It provides the best fuel
economy. If more power is needed
for passing, and the vehicle is:
. Going less than 56 km/h
(35 mph), push the accelerator
pedal about halfway down.
. Going about 56 km/h (35 mph) or
more, push the accelerator all
the way down.
Caution
If the vehicle does not shift gears,
the transmission could be
damaged. Have the vehicle
serviced right away. Operating Modes
The transmission may operate in a
lower gear than normal to improve
vehicle performance. The engine
speed may be higher and there may
be an increase in noise during the
following conditions:
.
When climbing a grade
. When driving downhill
. When driving in hot
temperatures or at high altitude
Manual Mode
Driver Shift Control (DSC)
Caution
Driving with the engine at a high
rpm without upshifting while using
Driver Shift Control (DSC), could
damage the vehicle. Always
upshift when necessary while
using DSC.