2021 BUICK ENVISION heater

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
Seats and Restraints 39
Obstructions
If something has blocked the driver seat
while recalling a memory position, the recall
may stop. Remove the obstruction and try
the recall again. If the memory position still
does not recall, see your dealer.
Heated and Ventilated Front
Seats
{Warning
If temperature change or pain to the skin
cannot be felt, the seat heater may cause
burns. To reduce the risk of burns, use
care when using the seat heater,
especially for long periods of time. Do
not place anything on the seat that
insulates against heat, such as a blanket,
cushion, cover, or similar item. This may
cause the seat heater to overheat. An
overheated seat heater may cause a burn
or may damage the seat.Heated and Ventilated Seat Buttons Shown,Heated Seat Buttons Similar
If equipped, the buttons are near the
climate controls on the center stack. To
operate, the engine must be running.
Lift
xoryfor the highest heated seat
setting. Lifting the heated seat button again
will keep the heated seat at the highest
setting. Press the heated seat button down
to lower the heat level or turn the heated
seat off. The passenger seat may take
longer to heat up.
Press
xory, if available, for the highest
ventilated seat setting. Pressing the
ventilated seat button again will keep the
ventilated seat at the highest setting. Lift the ventilated seat button to lower the vent
level or turn the ventilated seat off.
A ventilated seat has a fan that pulls or
pushes air through the seat. The air is not
cooled.
When a heated seat is turned on, the
indicator on button turns red. When a
ventilated seat is turned on, the indicator on
button turns blue. Three indicators
illuminate for the highest setting and one
for the lowest.
Auto Heated and Ventilated Seats
If the vehicle is equipped with auto heated
or ventilated seats, and the engine is
running, this feature will automatically
activate the heated or ventilated seats at
the level required by the vehicle's interior
temperature.
The active high, medium, low, or off heated
or ventilated seat level will be indicated by
the manual heated and ventilated seat
buttons on the center stack. Use the manual
heated and ventilated seat buttons on the
center stack to turn auto heated or
ventilated seats off. If the passenger seat is
unoccupied, the auto heated or ventilated
seats feature will not activate that seat. The
auto heated and ventilated seats feature can
be programmed to always be enabled when

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Seats and Restraints 55
turn off the front outboard passenger
frontal airbag, depending upon the person's
seating posture and body build. Everyone in
the vehicle who has outgrown child
restraints should wear a seat belt
properly—whether or not there is an
airbag for that person.
{Warning
If the airbag readiness light ever comes
on and stays on, it means that
something may be wrong with the airbag
system. To help avoid injury to yourself
or others, have the vehicle serviced right
away. See Airbag Readiness Light 094
for more information, including important
safety information.
If the On Indicator Is Lit for a Child
Restraint
The passenger sensing system is designed to
turn off the front outboard passenger
frontal airbag if the system determines that
an infant is present in a child restraint. If a
child restraint has been installed and the ON
indicator is lit:
1. Turn the vehicle off. 2. Remove the child restraint from the
vehicle.
3. Remove any additional items from the seat such as blankets, cushions, seat
covers, seat heaters, or seat massagers.
4. Reinstall the child restraint following the directions provided by the child restraint
manufacturer and refer to Securing Child
Restraints (With the Seat Belt in the
Front Seat) 073 or
Securing Child Restraints (With the Seat
Belt in the Rear Seat) 071.
Make sure the seat belt retractor is
locked by pulling the shoulder belt all
the way out of the retractor when
installing the child restraint, even if the
child restraint is equipped with a seat
belt lock off. When the retractor lock is
set, the belt can be tightened but not
pulled out of the retractor.
5. If, after reinstalling the child restraint and restarting the vehicle, the ON
indicator is still lit, turn the vehicle off.
Then slightly recline the vehicle seatback
and adjust the seat cushion,
if adjustable, to make sure that the
vehicle seatback is not pushing the child
restraint into the seat cushion. Also make sure the child restraint is not
trapped under the vehicle head restraint.
If this happens, adjust the head restraint.
See
Head Restraints 032.
6. Restart the vehicle.
The passenger sensing system may or may
not turn off the airbag for a child in a child
restraint depending upon the child’s size.
It is better to secure the child restraint in a
rear seat. Never put a rear-facing child
restraint in the front seat, even if the ON
indicator is not lit.
If the Off Indicator Is Lit for an
Adult-Sized Occupant

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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56 Seats and Restraints
If a person of adult size is sitting in the
front outboard passenger seat, but the OFF
indicator is lit, it could be because that
person is not sitting properly in the seat or
that the child restraint locking feature is
engaged. Use the following steps to allow
the system to detect that person and enable
the front outboard passenger frontal airbag:1. Turn the vehicle off.
2. Remove any additional material from the seat, such as blankets, cushions, seat
covers, seat heaters, or seat massagers.
3. Place the seatback in the fully upright position.
4. Have the person sit upright in the seat, centered on the seat cushion, with legs
comfortably extended.
5. If the shoulder portion of the belt is pulled out all the way, the child restraint
locking feature will be engaged. This
may unintentionally cause the passenger
sensing system to turn the airbag off for
some adult-sized occupants. If this
happens, unbuckle the belt, let the belt
go back all the way, and then buckle the
belt again without pulling the belt out
all the way. 6. Restart the vehicle and have the person
remain in this position for two to
three minutes after the ON indicator
is lit.
{Warning
If the front outboard passenger airbag is
turned off for an adult-sized occupant,
the airbag will not be able to inflate and
help protect that person in a crash,
resulting in an increased risk of serious
injury or even death. An adult-sized
occupant should not ride in the front
outboard passenger seat, if the passenger
airbag OFF indicator is lit.
Additional Factors Affecting System
Operation
Seat belts help keep the passenger in
position on the seat during vehicle
maneuvers and braking, which helps the
passenger sensing system maintain the
passenger airbag status. See “Seat Belts”
and “Child Restraints” in the Index for
additional information about the importance
of proper restraint use. A thick layer of additional material, such as
a blanket or cushion, or aftermarket
equipment such as seat covers, seat heaters,
and seat massagers can affect how well the
passenger sensing system operates. We
recommend that you not use seat covers or
other aftermarket equipment except when
approved by GM for your specific vehicle.
See
Adding Equipment to the
Airbag-Equipped Vehicle 057 for more
information about modifications that can
affect how the system operates.
The ON indicator may be lit if an object,
such as a briefcase, handbag, grocery bag,
laptop, or other electronic device, is put on
an unoccupied seat. If this is not desired,
remove the object from the seat.{Warning
Stowing articles under the passenger seat
or between the passenger seat cushion
and seatback may interfere with the
proper operation of the passenger
sensing system.

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Seats and Restraints 57
Servicing the Airbag-Equipped
Vehicle
Airbags affect how the vehicle should be
serviced. There are parts of the airbag
system in several places around the vehicle.
Your dealer and the service manual have
information about servicing the vehicle and
the airbag system. To purchase a service
manual, seePublication Ordering
Information 0336.
{Warning
For up to 10 seconds after the vehicle is
turned off and the battery is
disconnected, an airbag can still inflate
during improper service. You can be
injured if you are close to an airbag
when it inflates. Avoid yellow connectors.
They are probably part of the airbag
system. Be sure to follow proper service
procedures, and make sure the person
performing work for you is qualified to
do so.
Adding Equipment to the
Airbag-Equipped Vehicle
Adding accessories that change the vehicle's
frame, bumper system, height, front end,
or side sheet metal may keep the airbag
system from working properly.
The operation of the airbag system can also
be affected by changing, including
improperly repairing or replacing, any parts
of the following:
.Airbag system, including airbag modules,
front or side impact sensors, sensing and
diagnostic module, or airbag wiring
.Front seats, including stitching, seams or
zippers
.Seat belts
.Steering wheel, instrument panel,
overhead console, ceiling trim, or pillar
garnish trim
.Inner door seals, including speakers
Your dealer and the service manual have
information about the location of the airbag
modules and sensors, sensing and diagnostic
module, and airbag wiring along with the
proper replacement procedures. In addition, the vehicle has a passenger
sensing system for the front outboard
passenger position, which includes sensors
that are part of the passenger seat. The
passenger sensing system may not operate
properly if the original seat trim is replaced
with non-GM covers, upholstery, or trim; or
with GM covers, upholstery, or trim
designed for a different vehicle. Any object,
such as an aftermarket seat heater or a
comfort-enhancing pad or device, installed
under or on top of the seat fabric, could
also interfere with the operation of the
passenger sensing system. This could either
prevent proper deployment of the passenger
airbag(s) or prevent the passenger sensing
system from properly turning off the
passenger airbag(s). See
Passenger Sensing
System 053.
If the vehicle has rollover roof-rail airbags,
see Different Size Tires and Wheels 0292 for
additional important information.
If the vehicle must be modified because you
have a disability and have questions about
whether the modifications will affect the
vehicle's airbag system, or if you have
questions about whether the airbag system

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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186 Driving and Operating
Driving and Operating
Driving Information
Driver Behavior . . . . . . . . . . . . . . . . . . . . . . . . 187
Driving Environment . . . . . . . . . . . . . . . . . . . 187
Vehicle Design . . . . . . . . . . . . . . . . . . . . . . . . . 187
Driving for Better Fuel Economy . . . . . . . 187
Distracted Driving . . . . . . . . . . . . . . . . . . . . . 188
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . 188
Impaired Driving . . . . . . . . . . . . . . . . . . . . . . 189
Control of a Vehicle . . . . . . . . . . . . . . . . . . . 189
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 190
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 190
Driving on Wet Roads . . . . . . . . . . . . . . . . . 191
Hill and Mountain Roads . . . . . . . . . . . . . . . 191
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 192
If the Vehicle Is Stuck . . . . . . . . . . . . . . . . . 193
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 193
Starting and Operating
New Vehicle Break-In . . . . . . . . . . . . . . . . . . 196
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . 197
Starting the Engine . . . . . . . . . . . . . . . . . . . . 198
Stop/Start System . . . . . . . . . . . . . . . . . . . . . 199
Engine Heater . . . . . . . . . . . . . . . . . . . . . . . . . 200
Retained Accessory Power (RAP) . . . . . . . 201Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 201
Shifting out of Park . . . . . . . . . . . . . . . . . . . 202
Parking over Things That Burn . . . . . . . . 202
Extended Parking . . . . . . . . . . . . . . . . . . . . . . 202
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . 203
Running the Vehicle While Parked . . . . . 203
Automatic Transmission
Automatic Transmission . . . . . . . . . . . . . . . 203
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 206
Drive Systems
All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . 207
Brakes
Antilock Brake System (ABS) . . . . . . . . . . 207
Electric Parking Brake . . . . . . . . . . . . . . . . . 208
Brake Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . 209
Ride Control Systems
Traction Control/Electronic Stability
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Hill Descent Control (HDC) . . . . . . . . . . . . . 211
Driver Mode Control . . . . . . . . . . . . . . . . . . . 212
Cruise Control
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Adaptive Cruise Control (Advanced) . . . . 214
Driver Assistance Systems
Driver Assistance Systems . . . . . . . . . . . . . 222
Assistance Systems for Parking or Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Rear Pedestrian Alert . . . . . . . . . . . . . . . . . . 230
Assistance Systems for Driving . . . . . . . . 231
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Automatic Emergency Braking (AEB) . . . . . . . . . . . . . . . . . . . . . . . . 234
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Side Blind Zone Alert (SBZA) . . . . . . . . . . . 237
Lane Change Alert (LCA) . . . . . . . . . . . . . . . 237
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . 238
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Recommended Fuel . . . . . . . . . . . . . . . . . . . 240
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 241
Fuels in Foreign Countries . . . . . . . . . . . . . 241
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . 241
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . 241
Filling a Portable Fuel Container . . . . . . . 243

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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200 Driving and Operating
.The Auto Stop has reached the maximum
allowed time.
Auto Stop Disable Switch
The automatic engine Stop/Start feature can
be disabled and enabled by pressing
h.
Auto Stop/Start is enabled each time you
start the vehicle.
When the
hindicator is illuminated, the
system is enabled.
Engine Heater
The engine 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 engine heater at least four hours
before starting the vehicle. An internal
thermostat in the plug end of the cord will
prevent engine heater operation at
temperatures above −18 °C (0 °F).
{Warning
Do not plug in the engine block heater
while the vehicle is parked in a garage or
under a carport. Property damage or
personal injury may result. Always park
the vehicle in a clear open area away
from buildings or structures.
To Use the Engine Heater
1. Turn off the engine.
2. Check the heater cord for damage. If it is
damaged, do not use it. See your dealer
for a replacement. Inspect the cord for
damage at each use.
3. Remove the engine heater connectorcover by gently prying with a flat
blade tool.
4. Plug the heater cord into the connector in the front bumper.
5. Plug the cord into a grounded 110-volt AC outlet that is protected by a ground
fault detection function.
{Warning
Improper use of the heater cord or an
extension cord can damage the cord and
may result in overheating and fire.
(Continued)

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Driving and Operating 201
Warning (Continued)
.Plug the cord into a three-prong
electrical utility receptacle that is
protected by a ground fault detection
function. An ungrounded outlet could
cause an electric shock.
.Use a weatherproof, heavy-duty,
15 amp-rated extension cord if needed.
Failure to use the recommended
extension cord in good operating
condition, or using a damaged heater
or extension cord, could make it
overheat and cause a fire, property
damage, electric shock, and injury.
.Do not operate the vehicle with the
heater cord permanently attached to
the vehicle. Possible heater cord and
thermostat damage could occur.
.While in use, do not let the heater
cord touch vehicle parts or sharp
edges. Never close the hood on the
heater cord.
.Before starting the vehicle, unplug the
cord, reattach the cover to the plug,
and securely fasten the cord. Keep the
cord away from any moving parts.Before starting the engine, be sure to
unplug and store the cord.
The length of time the heater should remain
plugged in depends on several factors. Ask a
dealer in the area where you will be parking
the vehicle for the best advice on this.
Retained Accessory Power (RAP)
When the ignition is turned from on to off,
the following features (if equipped) will
continue to function for up to 10 minutes,
or until the driver door is opened. These
features will also work when the ignition is
in RUN or ACC/ACCESSORY:
.Infotainment System
.Power Windows (during RAP this
functionality will be lost when any door
is opened)
.Sunroof (during RAP this functionality will
be lost when any door is opened)
.Auxiliary Power Outlet
.Audio System
.OnStar System
Shifting Into Park
{Warning
It can be dangerous to get out of the
vehicle if the vehicle is not in P (Park)
with the parking brake set. The vehicle
can roll. If you have left the engine
running, the vehicle can move suddenly.
You or others could be injured. To be
sure the vehicle will not move, even
when you are on fairly level ground, use
the steps that follow. If you are pulling a
trailer, see
Driving Characteristics and
Towing Tips 0243.
1. Hold the brake pedal down and set the parking brake. See Electric Parking Brake
0 208.
2. Press the P (Park) switch on the center stack.
3. Press ENGINE START/STOP to turn the engine off.
If the vehicle is shifted into P (Park) on a
hill, the Electric Parking Brake (EPB) may
apply automatically. The driver may not be
able to release the EPB using the EPB
switch. It should automatically release when
the vehicle is shifted out of P (Park).

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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262 Vehicle Care
{Warning
If part replacement is necessary, the part
must be replaced with one of the same
part number or with an equivalent part.
Use of a replacement part without the
same fit, form, and function may result
in personal injury or damage to the
vehicle.
4. Inspect or replace the engine air cleaner/ filter.
5. Reverse Steps 1–3 to reinstall the filter cover housing.
6. If equipped, reset the engine air filter life system. See Engine Air Filter Life System
0 261.
{Warning
Operating the engine with the air
cleaner/filter off can cause you or others
to be burned. Use caution when working
on the engine. Do not start the engine or
drive the vehicle with the air cleaner/
filter off, as flames may be present if the
engine backfires.
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 driving.
Cooling System
The cooling system allows the engine to
maintain the correct working temperature.
1. Electric Engine Cooling Fan (Out
of View)
2. Coolant Surge Tank and Pressure Cap
{Warning
An underhood electric fan 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
Do not touch heater or radiator hoses,
or other engine parts. They can be very
hot and can burn you. Do not run the
engine if there is a leak; all coolant could
leak out. That could cause an engine fire
and can burn you. Fix any leak before
driving the vehicle.
Engine Coolant
The engine cooling system in the vehicle is
filled with DEX-COOL engine coolant mixture.
This coolant needs to be checked and
changed at appropriate levels. See
Recommended Fluids and Lubricants 0322.
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 0265.