2019 BUICK ENVISION cooling

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
18 In Brief
Climate Controls
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
1. Driver and PassengerTemperature Controls
2. Heated and Ventilated Front Seats (If Equipped)
3. Defrost
4. Air Delivery Mode Controls 5. Fan Control
6. SYNC (Synchronized
Temperature)
7. AUTO (Automatic Operation)
8. Recirculation 9. A/C (Air Conditioning)
10. Rear Window Defogger
11. Power
See Dual Automatic Climate Control
System 0169 andRear Climate
Control System 0172, if equipped.
Transmission
Electronic Range Select
(ERS) Mode
ERS or manual mode allows for the
selection of the range of gear
positions. Use this mode when
driving downhill to limit the top gear
and vehicle speed.
To use this feature:
1. Move the shift lever to L (Low).
2. Press the plus/minus button on the shift lever to increase or
decrease the gear range
available.
See Manual Mode 0199.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
Lighting 167
When the state of charge is high,
the voltage is lowered slightly to
prevent overcharging. The voltmeter
gauge or the voltage display on the
Driver Information Center (DIC),
if equipped, may show the voltage
moving up or down. This is normal.
If there is a problem, an alert will be
displayed.
The battery can be discharged at
idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fast
enough at idle to produce all the
power that is needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog
lamps, rear window defogger,
climate control fan at high speed,
heated seats, engine cooling fans,
trailer loads, and loads plugged into
accessory power outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.It can increase engine idle speed to
generate more power, whenever
needed. It can temporarily reduce
the power demands of some
accessories.
Normally, these actions occur in
steps or levels, without being
noticeable. In rare cases at the
highest levels of corrective action,
this action may be noticeable to the
driver. If so, a DIC message might
be displayed and it is recommended
that the driver reduce the electrical
loads as much as possible.
Battery Power Protection
The battery saver feature is
designed to protect the vehicle's
battery.
If some interior lamps are left on
and the ignition is turned off, the
battery rundown protection system
automatically turns the lamp off after
some time.
Exterior Lighting Battery
Saver
The exterior lamps turn off about
10 minutes after the ignition is
turned off, if the parking lamps or
headlamps have been manually left
on. This protects against draining
the battery. To restart the 10-minute
timer, turn the exterior lamp control
to the
Oposition and then back to
the
;or2position.
To keep the lamps on for more than
10 minutes, the ignition must be on
or in ACC/ACCESSORY.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
Climate Controls 169
Climate Controls
Climate Control Systems
Dual Automatic ClimateControl System . . . . . . . . . . . . . 169
Rear Climate Control System . . . . . . . . . . . . . . . . . . . . . . 172
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . 174
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . 174
Service . . . . . . . . . . . . . . . . . . . . . . . 175
Climate Control Systems
Dual Automatic Climate Control System
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
1. Driver and Passenger
Temperature Controls
2. Heated and Ventilated Front Seats (If Equipped) 3. Defrost
4. Air Delivery Mode Controls
5. Fan Control

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
182 Driving and Operating
Other Rainy Weather Tips
Besides slowing down, other wet
weather driving tips include:
.Allow extra following distance.
. Pass with caution.
. Keep windshield wiping
equipment in good shape.
. Keep the windshield washer fluid
reservoir filled.
. Have good tires with proper
tread depth. See Tires0277.
. Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving
on flat or rolling terrain. Tips include:
.Keep the vehicle serviced and in
good shape.
. Check all fluid levels and brakes,
tires, cooling system, and
transmission.
. Shift to a lower gear when going
down steep or long hills.
{Warning
Using the brakes to slow the
vehicle on a long downhill slope
can cause brake overheating, can
reduce brake performance, and
could result in a loss of braking.
Shift the transmission to a lower
gear to let the engine assist the
brakes on a steep downhill slope.
{Warning
Coasting downhill in N (Neutral)
or with the ignition off is
dangerous. This can cause
overheating of the brakes and
loss of steering assist. Always
have the engine running and the
vehicle in gear.
. Drive at speeds that keep the
vehicle in its own lane. Do not
swing wide or cross the
center line. .
Be alert on top of hills;
something could be in your lane
(e.g., stalled car, crash).
. Pay attention to special road
signs (e.g., falling rocks area,
winding roads, long grades,
passing or no-passing zones)
and take appropriate action.
Winter Driving
Driving on Snow or Ice
Snow or ice between the tires and
the road creates less traction or
grip, so drive carefully. Wet ice can
occur at about 0 °C (32 °F) when
freezing rain begins to fall. Avoid
driving on wet ice or in freezing rain
until roads can be treated.
For Slippery Road Driving:
.Accelerate gently. Accelerating
too quickly causes the wheels to
spin and makes the surface
under the tires slick.
. Turn on Traction Control. See
Traction Control/Electronic
Stability Control 0203.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
Driving and Operating 237
The vehicle can tow in D (Drive).
Shift the transmission to a lower
gear if the transmission shifts too
often under heavy loads and/or hilly
conditions.
When towing at higher altitudes,
engine coolant will boil at a lower
temperature than at lower altitudes.
If the engine is turned off
immediately after towing at high
altitude on steep uphill grades, the
vehicle could show signs similar to
engine overheating. To avoid this,
let the engine run, preferably on
level ground, with the transmission
in P (Park) for a few minutes before
turning the engine off. If the
overheat warning comes on, see
Engine Overheating0259.
Parking on Hills
{Warning
To prevent serious injury or death,
always park your vehicle and
trailer on a level surface when
possible. When parking your vehicle and your
trailer on a hill:
1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if
facing downhill or into traffic if
facing uphill.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, gradually release the
brake pedal to allow the chocks
to absorb the load of the trailer.
4. Reapply the brake pedal. Then apply the parking brake and
shift into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
.Start the engine.
. Shift into a gear.
. Release the parking brake.
2. Let up on the brake pedal. 3. Drive slowly until the trailer is
clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer
Towing
The vehicle needs service more
often when used to tow trailers. See
Maintenance Schedule 0323. It is
especially important to check the
automatic transmission fluid, engine
oil, axle lubricant, belts, cooling
system, and brake system before
and during each trip.
Check periodically that all nuts and
bolts on the trailer hitch are tight.
Engine Cooling When Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. See Engine Overheating
0 259.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
Vehicle Care 243
Vehicle Care
General Information
General Information . . . . . . . . . . 244
California Proposition65 Warning . . . . . . . . . . . . . . . . . 244
California Perchlorate Materials Requirements . . . . . 245
Accessories and Modifications . . . . . . . . . . . . . . . . 245
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 245
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 246
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 247
Engine Oil . . . . . . . . . . . . . . . . . . . . 250
Engine Oil Life System . . . . . . . 252
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 253
Engine Air Cleaner/Filter . . . . . . 254
Cooling System . . . . . . . . . . . . . . 256
Engine Overheating . . . . . . . . . . 259
Washer Fluid . . . . . . . . . . . . . . . . . 261
Brakes . . . . . . . . . . . . . . . . . . . . . . . 261
Brake Fluid . . . . . . . . . . . . . . . . . . . 262
Battery - North America . . . . . . 263
All-Wheel Drive . . . . . . . . . . . . . . . 264 Starter Switch Check . . . . . . . . . 264
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 265
Park Brake and P (Park)
Mechanism Check . . . . . . . . . . 265
Wiper Blade Replacement . . . . 265
Windshield Replacement . . . . . 267
Gas Strut(s) . . . . . . . . . . . . . . . . . . 267
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 268
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 269
Halogen Bulbs . . . . . . . . . . . . . . . . 269
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 269
License Plate Lamp . . . . . . . . . . 269
Electrical System
Electrical System Overload . . . 270
Fuses and Circuit Breakers . . . 271
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 271
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 274
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 275
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 277 All-Season Tires . . . . . . . . . . . . . . 278
Winter Tires . . . . . . . . . . . . . . . . . . 278
Summer Tires . . . . . . . . . . . . . . . . 279
Tire Sidewall Labeling . . . . . . . . 279
Tire Designations . . . . . . . . . . . . . 281
Tire Terminology and
Definitions . . . . . . . . . . . . . . . . . . 282
Tire Pressure . . . . . . . . . . . . . . . . . 284
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 286
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 287
Tire Inspection . . . . . . . . . . . . . . . . 291
Tire Rotation . . . . . . . . . . . . . . . . . 291
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 292
Buying New Tires . . . . . . . . . . . . . 293
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 294
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 294
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 296
Wheel Replacement . . . . . . . . . . 296
Tire Chains . . . . . . . . . . . . . . . . . . . 297
If a Tire Goes Flat . . . . . . . . . . . . 297
Tire Changing . . . . . . . . . . . . . . . . 299
Compact Spare Tire . . . . . . . . . . 304

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
248 Vehicle Care
1.Engine Air Cleaner/Filter 0254.
2. Engine Duct.
3. Engine Oil Fill Cap. See Engine Oil 0250.
4. Engine Oil Dipstick. See Engine Oil 0250. 5. Engine Cover.
6. Brake Fluid Reservoir. See
Brake Fluid 0262.
7. Engine Coolant Surge Tank and Pressure Cap. See
Cooling System 0256. 8.
Battery - North America 0263.
9. Windshield Washer Fluid Reservoir. See Washer Fluid
0 261.
10. Engine Compartment Fuse
Block 0271.

Buick Envision Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12032235) - 2019 - CRC - 6/27/18
250 Vehicle Care
1.Engine Air Cleaner/Filter 0254.
2. Engine Duct.
3. Engine Oil Fill Cap. See Engine Oil 0250.
4. Engine Oil Dipstick. See Engine Oil 0250.
5. Engine Cover.
6. Brake Fluid Reservoir. See Brake Fluid 0262.
7. Engine Coolant Surge Tank and Pressure Cap. See
Cooling System 0256.
8. Battery - North America 0263.
9. Windshield Washer Fluid Reservoir. See Washer Fluid
0 261.
10. Engine Compartment Fuse
Block 0271.
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: .
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 0252.
. Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially
prior to a long trip. The engine oil
dipstick handle is a loop. See
Engine Compartment Overview
0247 for the location.
{Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.
If a low oil Driver Information Center
(DIC) message displays, check the
oil level.
Follow these guidelines:
. To get an accurate reading, park
the vehicle on level ground.
Check the engine oil level after
the engine has been off for at
least two hours. Checking the
engine oil level on steep grades
or too soon after engine shutoff
can result in incorrect readings.
Accuracy improves when
checking a cold engine prior to
starting. Remove the dipstick
and check the level.
. If unable to wait two hours, the
engine must be off for at least
15 minutes if the engine is
warm, or at least 30 minutes if