service indicator BUICK ENVISION 2021 Owner's Guide

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
Driving and Operating 251
brakes are selectively applied at each wheel,
to help reduce excessive trailer sway.
If equipped with the Integrated Trailer Brake
Control (ITBC) system, and the trailer has an
electric brake system, StabiliTrak/ESC may
also apply the trailer brakes.
If TSC is enabled, the Traction Control
System (TCS)/StabiliTrak/ESC warning light
will flash on the instrument cluster. Reduce
vehicle speed by gradually removing your
foot from the accelerator. If trailer sway
continues, StabiliTrak/ESC can reduce engine
torque to help slow the vehicle. TSC will not
function if StabiliTrak/ESC is turned off. See
Traction Control/Electronic Stability Control
0210.
{Warning
Trailer sway can result in a crash and in
serious injury or death, even if the
vehicle is equipped with TSC.
(Continued)
Warning (Continued)
If the trailer begins to sway, reduce
vehicle speed by gradually removing your
foot from the accelerator. Then pull over
to check the trailer and vehicle to help
correct possible causes, including an
improperly or overloaded trailer,
unrestrained cargo, improper trailer hitch
configuration, or improperly inflated or
incorrect vehicle or trailer tires. See
Towing Equipment0249 for trailer
ratings and hitch setup recommendations.
Trailer Tires
Special Trailer (ST) tires differ from vehicle
tires. Trailer tires are designed with stiff
sidewalls to help prevent sway and to
support heavy loads. These features can
make it difficult to determine if the trailer
tire pressures are low only based on a visual
inspection.
Always check all trailer tire pressures before
each trip when the tires are cool. Low trailer
tire pressure is a leading cause of trailer tire
blow-outs. Trailer tires deteriorate over time. The trailer
tire sidewall will show the week and year
the tire was manufactured. Many trailer tire
manufacturers recommend replacing tires
more than six years old.
Overloading is another leading cause of
trailer tire blow-outs. Never load your trailer
with more weight than the tires are
designed to support. The load rating is
located on the trailer tire sidewall.
Always know the maximum speed rating for
the trailer tires before driving. This may be
significantly lower than the vehicle tire
speed rating. The speed rating may be on
the trailer tire sidewall. If the speed rating is
not shown, the default trailer tire speed
rating is 105 km/h (65 mph).
Conversions and Add-Ons
Add-On Electrical Equipment
{Warning
The Data Link Connector (DLC) is used for
vehicle service and Emission Inspection/
Maintenance testing. See
Malfunction
Indicator Lamp (Check Engine Light) 095.
(Continued)

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
Vehicle Care 265
4. Turn the ignition on. SeeIgnition
Positions 0197.
5. Turn off the air conditioning.
6. Set the parking brake.
7. At the same time, press the accelerator and the brake for automatic transmission
vehicles for two seconds, then release.
At the end of the cycle, check the coolant
level in the surge tank and add coolant if it
is low. Turn off the vehicle, allow the
Electronic Control Module (ECM) to go to
sleep, about 2 minutes, and repeat Steps 3-7.
Listen for pump activation and movement of
the control valves while watching the level
of the coolant in the surge tank. If the tank
empties, turn the ignition off, carefully
remove the surge tank cap, refill to the
indicated mark, and repeat Steps 3-6. The fill
and air removal process will run for
approximately 10 minutes.
Engine Overheating
The vehicle has several indicators to warn of
the engine overheating. There is an engine coolant temperature
gauge and an engine coolant temperature
warning light on the instrument cluster. See
Engine Coolant Temperature Gauge
093.
The vehicle may also display a message on
the Driver Information Center (DIC).
If the decision is made not to lift the hood
when this warning appears, get service help
right away.
If the decision is made to lift the hood,
make sure the vehicle is parked on a level
surface. Then check to see if the engine
cooling fan is running. If the engine is
overheating, the fan should be running. If it
is not, do not continue to run the engine.
Have the vehicle serviced.
Caution
Do not run the engine if there is a leak
in the engine cooling system. This can
cause a loss of all coolant and can
damage the system and vehicle. Have
any leaks fixed right away.
If Steam Is Coming from the Engine
Compartment
{Warning
Steam and scalding liquids from a hot
cooling system are under pressure.
Turning the pressure cap, even a little,
can cause them to come out at high
speed and you could be burned. Never
turn the cap when the cooling system,
including the pressure cap, is hot. Wait
for the cooling system and pressure cap
to cool.
If No Steam Is Coming from the Engine
Compartment
If an engine overheat warning is displayed
but no steam can be seen or heard, the
problem may not be too serious. Sometimes
the engine can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
.Idles for long periods in traffic.
If the overheat warning is displayed with no
sign of steam: 1. Turn the air conditioning off.

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
320 Service and Maintenance
Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. SeeRecommended Fluids and
Lubricants 0322 for GM approved fluids.
.Engine oil and windshield washer fluid
levels should be checked at every fuel fill.
.Instrument cluster lights may come on to
indicate that fluids may be low and need
to be filled.
Hoses
Hoses transport fluids and should be
regularly inspected to ensure that there are
no cracks or leaks. With a multi-point
inspection, your dealer can inspect the hoses
and advise if replacement is needed.
Lamps
Properly working headlamps, taillamps, and
brake lamps are important to see and be
seen on the road.
.Signs that the headlamps need attention
include dimming, failure to light, cracking,
or damage. The brake lamps need to be
checked periodically to ensure that they
light when braking.
.With a multi-point inspection, your dealer
can check the lamps and note any
concerns.
Shocks and Struts
Shocks and struts help aid in control for a
smoother ride.
.Signs of wear may include steering wheel
vibration, bounce/sway while braking,
longer stopping distance, or uneven
tire wear.
.As part of the multi-point inspection,
trained dealer technicians can visually
inspect the shocks and struts for signs of
leaking, blown seals, or damage, and can
advise when service is needed.
Tires
Tires need to be properly inflated, rotated,
and balanced. Maintaining the tires can save
money and fuel, and can reduce the risk of
tire failure.
.Signs that the tires need to be replaced
include three or more visible treadwear
indicators; cord or fabric showing through
the rubber; cracks or cuts in the tread or
sidewall; or a bulge or split in the tire.
.Trained dealer technicians can inspect and
recommend the right tires. Your dealer
can also provide tire/wheel balancing
services to ensure smooth vehicle
operation at all speeds. Your dealer sells
and services name brand tires.
Vehicle Care
To help keep the vehicle looking like new,
vehicle care products are available from your
dealer. For information on how to clean and
protect the vehicle’s interior and exterior,
see Interior Care 0309 and
Exterior Care 0305.
Wheel Alignment
Wheel alignment is critical for ensuring that
the tires deliver optimal wear and
performance.
.Signs that the alignment may need to be
adjusted include pulling, improper vehicle
handling, or unusual tire wear.
.Your dealer has the required equipment
to ensure proper wheel alignment.

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
352 Index
Fuel (cont'd)Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Fuses Engine Compartment Fuse Block . . . . . . . 273
Fuses and Circuit Breakers . . . . . . . . . . . . . 273
Instrument Panel Fuse Block . . . . . . . . . . . 276
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . . 113Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Gauges Engine Coolant Temperature . . . . . . . . . . . . 93
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Warning Lights and Indicators . . . . . . . . . . 89
General Information Service and Maintenance . . . . . . . . . . . . . . 313
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Global Positioning System (GPS) . . . . . . . . . .147
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
GM Mobility Reimbursement Program . . . . 331
Guidance Problems with the Route . . . . . . . . . . . . . . 147
H
Hazard Warning Flashers . . . . . . . . . . . . . . . . . 121
HD Radio Technology . . . . . . . . . . . . . . . . . . . . . 132
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Head-up Display . . . . . . . . . . . . . . . . . . . . . . . . . 105
HeadlampsAdaptive Forward Lighting (AFL) . . . . . . . . 121
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 272
Daytime Running Lamps (DRL) . . . . . . . . . 120
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
High-Beam On Light . . . . . . . . . . . . . . . . . . . 102
High/Low Beam Changer . . . . . . . . . . . . . . 120
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 102
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 82
Heated and Ventilated Front Seats . . . . . . . 39
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178, 180
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . 102
High-Speed Operation . . . . . . . . . . . . . . . . . . . 285
Hill and Mountain Roads . . . . . . . . . . . . . . . . . 191
Hill Descent Control (HDC) . . . . . . . . . . . . . . . . 211
Hill Descent Control Light . . . . . . . . . . . . . . . . . 98
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . 209 Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
How to Wear Seat Belts Properly . . . . . . . . . 43
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178, 180
I
If the System Needs Service . . . . . . . . . . . . . 148
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . 197
Indicator
Pedestrian Ahead . . . . . . . . . . . . . . . . . . . . . . . 99
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Infants and Young Children, Restraints . . . . 60
Information
Publication Ordering . . . . . . . . . . . . . . . . . . . 336
Infotainment System . . . . . . . . . . . . . . . . . . . . 339
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . . 89
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . 26
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 125
J
Jump Starting - North America . . . . . . . . . . . 302
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . . . . . 7
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 280

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
Index 353
LampsCourtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Daytime Running (DRL) . . . . . . . . . . . . . . . . 120
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . . 117
Exterior Lamps Off Reminder . . . . . . . . . . 120
Exterior Lighting Battery Saver . . . . . . . . 124
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 237
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . 238
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . . 98
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 44
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 70
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Lighting Adaptive Forward . . . . . . . . . . . . . . . . . . . . . . . 121
Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Illumination Control . . . . . . . . . . . . . . . . . . . 122
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 Lights
Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 94
All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . . 98
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Brake System Warning . . . . . . . . . . . . . . . . . 96
Charging System . . . . . . . . . . . . . . . . . . . . . . . 95
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 102
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Driver Mode Control . . . . . . . . . . . . . . . . . . . 100
Electric Parking Brake . . . . . . . . . . . . . . . . . . . 97
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . 101
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . 102
High/Low Beam Changer . . . . . . . . . . . . . . 120
Hill Descent Control . . . . . . . . . . . . . . . . . . . . 98
Lane Keep Assist . . . . . . . . . . . . . . . . . . . . . . . . 98
Low Fuel Warning . . . . . . . . . . . . . . . . . . . . . 101
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . . 93
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Service Electric Parking Brake . . . . . . . . . . . 97
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Lights (cont'd)
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . . . . . . 100
Traction Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 15
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . 15
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Low Fuel Warning Light . . . . . . . . . . . . . . . . . .101
Lower Anchors and Tethers for
Children (LATCH System) . . . . . . . . . . . . . . . . 65
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . . . . 34
Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Maintenance Schedule . . . . . . . . . . . . . . . . . . . .314 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Malfunction Indicator Lamp . . . . . . . . . . . . . . . 95
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Buick E2UB-N Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14583509) - 2021 - CRC - 1/8/21
354 Index
Map Data Updates . . . . . . . . . . . . . . . . . . . . . . . 148
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
MediaAvoiding Untrusted Devices . . . . . . . . . . . . 134
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Mirror
Rear Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mirrors Automatic Dimming . . . . . . . . . . . . . . . . . . . . 25
Automatic Dimming Rearview . . . . . . . . . . 26
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Manual Rearview . . . . . . . . . . . . . . . . . . . . . . . 26
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mirrors, Interior Rearview . . . . . . . . . . . . . . . . . 26
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Driver Control . . . . . . . . . . . . . . . . . . . . . . . . . 212
Monitor System, Tire Pressure . . . . . . . . . . . 286
Multi-band Antenna . . . . . . . . . . . . . . . . . . . . . . 133N
Navigation Connected Services . . . . . . . . . . . . . . . . . . . . 345
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Using the System . . . . . . . . . . . . . . . . . . . . . . 138
Navigation Symbols . . . . . . . . . . . . . . . . . . . . . . 141
Net, Convenience . . . . . . . . . . . . . . . . . . . . . . . . . 79
New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . 196
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Engine Oil Life System . . . . . . . . . . . . . . . . . 260
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . 101
Older Children, Restraints . . . . . . . . . . . . . . . . . 58
Online Owner Center . . . . . . . . . . . . . . . . . . . . 330
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
OnStar Additional Information . . . . . . . . . . . .341
OnStar Emergency . . . . . . . . . . . . . . . . . . . . . . . .341
OnStar Overview . . . . . . . . . . . . . . . . . . . . . . . . . 340
OnStar Security . . . . . . . . . . . . . . . . . . . . . . . . . . .341
OnStar System . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Overheating, Engine . . . . . . . . . . . . . . . . . . . . . 265
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . 4
P
ParkShifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . 202
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Parking Brake and P (Park) MechanismCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Over Things That Burn . . . . . . . . . . . . . . . . . 202
Parking or Backing Assistance Systems . . . . . . . . . . . . . . . . . . . . 223
Passenger Airbag Status Indicator . . . . . . . . . 94
Passenger Compartment Air Filter . . . . . . . 184
Passenger Sensing System . . . . . . . . . . . . . . . . .53
Pedestrian Ahead Indicator . . . . . . . . . . . . . . . 99
Perchlorate Materials Requirements,
California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Phone Apple CarPlay and Android Auto . . . . . . . 158
Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . 153, 154