climate control GMC YUKON XL 2019 Owner's Guide

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
196 Climate Controls
climate controls, the rear climate
temperature is linked to the driver
temperature setting.
MODE :Press to change the
direction of the airflow in the vehicle.
Repeatedly press the button until
the desired mode appears on the
display. Multiple presses will cycle
through the delivery selections.
MorL: If equipped, pressMorLto heat the left or right outboard seat
cushion. See Heated Rear Seats (If
Equipped) 074.
Air Vents
Adjustable air vents are in the
center and on the side of the
instrument panel.
1. Slider Knob
2. Thumbwheel
Move the slider knobs (1) to change
the direction of the airflow.
Use the thumbwheels (2) near the
air vents to open or close off the
airflow. Operation Tips
.
Clear away any ice, snow,
or leaves from the air inlets at
the base of the windshield that
could block the flow of air into
the vehicle.
. Clear snow off the hood to
improve visibility and help
decrease moisture drawn into
the vehicle.
. When you enter a vehicle in cold
weather, press the fan up button
to the maximum fan level before
driving. This helps clear the
intake ducts of snow and
moisture, and reduces the
chance of fogging the inside of
the window.
. Keep the air path under the front
seats clear of objects to help
circulate the air inside of the
vehicle more effectively.
. Use of non-GM approved hood
deflectors can adversely affect
the performance of the system.
Check with your dealer before
adding equipment to the outside
of the vehicle.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
Climate Controls 197
Maintenance
Passenger Compartment
Air Filter
The filter reduces the dust, pollen,
and other airborne irritants from
outside air that is pulled into the
vehicle.
The filter should be replaced as part
of routine scheduled maintenance.
SeeMaintenance Schedule 0395.
To find out what type of filter to use,
see Maintenance Replacement
Parts 0406.
1. Open the glove box completely. 2. Disconnect the glove box door
damper string from the glove
box door assembly. A pen or
pencil may be inserted through
the end of the damper string to
prevent the string from slipping
inside the door assembly.
3. Remove the six screws and
remove the access plate.
4. Release the two tabs holdingthe service door. Open the
service door and remove the
old filter.
5. Install the new air filter.
6. Close the service door and secure the tabs.
7. Reverse the steps to reinstall the glove box.
See your dealer if additional
assistance is needed.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
198 Climate Controls
Service
All vehicles have a label underhood
that identifies the refrigerant used in
the vehicle. The refrigerant system
should only be serviced by trained
and certified technicians. The air
conditioning evaporator should
never be repaired or replaced by
one from a salvage vehicle.
It should only be replaced by a new
evaporator to ensure proper and
safe operation.
During service, all refrigerants
should be reclaimed with proper
equipment. Venting refrigerants
directly to the atmosphere is harmful
to the environment and may also
create unsafe conditions based on
inhalation, combustion, frostbite,
or other health-based concerns.
The air conditioning system requires
periodic maintenance. See
Maintenance Schedule0395.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
200 Driving and Operating
Recommended Fuel (L83 5.3LV8 Engine) . . . . . . . . . . . . . . . . . . 269
Recommended Fuel (L86 6.2L V8 Engine) . . . . . . . . . . . . . . . . . . 269
Prohibited Fuels . . . . . . . . . . . . . . 269
Fuels in Foreign Countries . . . 270
Fuel Additives . . . . . . . . . . . . . . . . 270
E85 or FlexFuel . . . . . . . . . . . . . . 270
Filling the Tank . . . . . . . . . . . . . . . 271
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 272
Trailer Towing
General TowingInformation . . . . . . . . . . . . . . . . . . 273
Driving Characteristics and Towing Tips . . . . . . . . . . . . . . . . . 273
Trailer Towing . . . . . . . . . . . . . . . . 278
Towing Equipment . . . . . . . . . . . . 284
Trailer Sway Control (TSC) . . . 292
Conversions and Add-Ons
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . 294
Driving Information
Distracted Driving
Distraction comes in many forms
and can take your focus from the
task of driving. Exercise good
judgment and do not let other
activities divert your attention away
from the road. Many local
governments have enacted laws
regarding driver distraction. Become
familiar with the local laws in
your area.
To avoid distracted driving, keep
your eyes on the road, keep your
hands on the steering wheel, and
focus your attention on driving.
. Do not use a phone in
demanding driving situations.
Use a hands-free method to
place or receive necessary
phone calls.
. Watch the road. Do not read,
take notes, or look up
information on phones or other
electronic devices. .
Designate a front seat
passenger to handle potential
distractions.
. Become familiar with vehicle
features before driving, such as
programming favorite radio
stations and adjusting climate
control and seat settings.
Program all trip information into
any navigation device prior to
driving.
. Wait until the vehicle is parked
to retrieve items that have fallen
to the floor.
. Stop or park the vehicle to tend
to children.
. Keep pets in an appropriate
carrier or restraint.
. Avoid stressful conversations
while driving, whether with a
passenger or on a cell phone.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
210 Driving and Operating
.Allow greater following distance
and watch for slippery spots. Icy
patches can occur on otherwise
clear roads in shaded areas.
The surface of a curve or an
overpass can remain icy when
the surrounding roads are clear.
Avoid sudden steering
maneuvers and braking while
on ice.
. Turn off cruise control.
Blizzard Conditions
Stop the vehicle in a safe place and
signal for help. Stay with the vehicle
unless there is help nearby.
If possible, use Roadside
Assistance. See Roadside
Assistance Program 0415. To get
help and keep everyone in the
vehicle safe:
. Turn on the hazard warning
flashers.
. Tie a red cloth to an outside
mirror.
{Warning
Snow can trap engine exhaust
under the vehicle. This may
cause exhaust gases to get
inside. Engine exhaust contains
carbon monoxide (CO), which
cannot be seen or smelled. It can
cause unconsciousness and even
death.
If the vehicle is stuck in snow:
. Clear snow from the base of
the vehicle, especially any
blocking the exhaust pipe.
. Open a window about 5 cm
(2 in) on the vehicle side
that is away from the wind,
to bring in fresh air.
. Fully open the air outlets on
or under the instrument
panel.
. Adjust the climate control
system to circulate the air
inside the vehicle and set
(Continued)
Warning (Continued)
the fan speed to the highest
setting. See“Climate
Control Systems.”
For more information about CO,
see Engine Exhaust 0227.
To save fuel, run the engine for
short periods to warm the vehicle
and then shut the engine off and
partially close the window. Moving
about to keep warm also helps.
If it takes time for help to arrive,
when running the engine, push the
accelerator pedal slightly so the
engine runs faster than the idle
speed. This keeps the battery
charged to restart the vehicle and to
signal for help with the headlamps.
Do this as little as possible, to
save fuel.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
244 Driving and Operating
Hill Descent
Control (HDC)
If equipped, Hill Descent Control
(HDC) sets and maintains vehicle
speed while driving down steep
grades in a forward or reverse gear.
The HDC switch is on the center
stack, below the climate controls.
Press
5to enable or disable HDC.
Vehicle speed must be below
50 km/h (31 mph).
When enabled, the HDC light
displays on the instrument cluster.
A blinking HDC light indicates the
system is actively applying the
brakes to maintain vehicle speed.
HDC can maintain vehicle speeds
between 1 and 30 km/h (1 and
19 mph) on grades greater than or
equal to 10%. If HDC is to be used for more than
three minutes or on grades steeper
than 25%, the transfer case should
be put into Four-Wheel Drive Low (4
n) to reduce the possibility of brake
overheating.
Noise from the hydraulic brake
control module is normal when HDC
is active.
When HDC is activated, the initial
HDC speed is set to the current
driving speed. It can be increased or
decreased by pressing +RES or
SET- on the steering wheel, or by
applying the accelerator or brake
pedal. This adjusted speed
becomes the new set speed.
HDC will remain enabled between
30 and 60 km/h (19 and 37 mph);
however, vehicle speed cannot be
set or maintained in this range. HDC
will automatically disable if the
vehicle speed is above 80 km/h
(50 mph) or above 60 km/h
(37 mph) for at least 30 seconds.
5must be pressed again to
re-enable HDC. HDC may disable
after an extended period of use. If this happens, HDC will require
time to cool down. The length of
time HDC remains active depends
on road conditions, grade, set
speed, vehicle loading, and outside
temperature.
When enabled, if the vehicle speed
is above 30 km/h (19 mph) and
below 60 km/h (37 mph), a DIC
message will display.
Magnetic Ride Control
If equipped, this vehicle may have a
semi-active damping system called
Magnetic Ride Control. With this
feature, improved vehicle ride and
handling is provided under a variety
of passenger and loading
conditions.
Magnetic Ride Control is fully
automatic and uses a computer
controller to continuously monitor
vehicle speed, wheel to body
position, lift/dive, and steering
position of the vehicle. The
controller then sends signals to
each shock absorber to

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
Driving and Operating 275
Warning (Continued)
When towing a trailer:. Do not drive with the
liftgate, trunk/hatch,
or rear-most window open.
. Fully open the air outlets on
or under the instrument
panel.
. Also adjust the climate
control system to a setting
that brings in only outside
air. See “Climate Control
Systems” in the Index.
For more information about
carbon monoxide, see Engine
Exhaust 0227.
Towing a trailer requires experience.
The combination of the vehicle and
trailer is longer and not as
responsive as the vehicle itself. Get
used to the handling and braking of
the combination by driving on a
level road surface before driving on
public roads. The trailer structure, the tires, and
the brakes must be all be rated to
carry the intended cargo.
Inadequate trailer equipment can
cause the combination to operate in
an unexpected or unsafe manner.
Before driving, inspect all trailer
hitch parts and attachments, safety
chains, electrical connectors, lamps,
tires, and mirrors. See
Towing
Equipment 0284. If the trailer has
electric brakes, start the
combination moving and then
manually apply the trailer brake
controller to check the trailer brakes
work. During the trip, occasionally
check that the cargo and trailer are
secure and that the lamps and any
trailer brakes are working.
Towing with a Stability Control
System
When towing, the stability control
system might be heard. The system
reacts to vehicle movement caused
by the trailer, which mainly occurs
during cornering. This is normal
when towing heavier trailers.
Following Distance
Stay at least twice as far behind the
vehicle ahead as you would when
driving without a trailer. This can
help to avoid heavy braking and
sudden turns.
Passing
More passing distance is needed
when towing a trailer. The
combination of the vehicle and
trailer will not accelerate as quickly
and is much longer than the vehicle
alone. It is necessary to go much
farther beyond the passed vehicle
before returning to the lane. Pass
on level roadways. Avoid passing
on hills if possible.
Backing Up
Hold the bottom of the steering
wheel with one hand. To move the
trailer to the left, move that hand to
the left. To move the trailer to the
right, move that hand to the right.
Always back up slowly and,
if possible, have someone
guide you.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
Vehicle Care 359
Warning (Continued)
developed for the vehicle, and
have them properly installed by a
GM certified technician.
See Buying New Tires 0357 and
Accessories and Modifications
0 297.
Uniform Tire Quality
Grading
The following information relates
to the system developed by the
United States National Highway
Traffic Safety Administration
(NHTSA), which grades tires by
treadwear, traction, and
temperature performance. This
applies only to vehicles sold in
the United States. The grades
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading
(UTQG) system does not apply
to deep tread, winter tires, compact spare tires, tires with
nominal rim diameters of
10 to 12 inches (25 to 30 cm),
or to some limited-production
tires.
While the tires available on
General Motors passenger cars
and light trucks may vary with
respect to these grades, they
must also conform to federal
safety requirements and
additional General Motors Tire
Performance Criteria (TPC)
standards.
Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
All Passenger Car Tires Must
Conform to Federal Safety
Requirements In Addition To
These Grades.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course. For example, a tire
graded 150 would wear one and
one-half (1½) times as well on
the government course as a tire
graded 100. The relative
performance of tires depends
upon the actual conditions of
their use, however, and may
depart significantly from the
norm due to variations in driving
habits, service practices and
differences in road
characteristics and climate.
Traction
The traction grades, from
highest to lowest, are AA, A, B,
and C. Those grades represent
the tire's ability to stop on wet
pavement as measured under
controlled conditions on

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
Index 439
Check (cont'd)Ignition Transmission Lock . . . 322
Child Restraints Infants and Young Children . . . 106
Lower Anchors and Tethers
for Children . . . . . . . . . . . . . . . . . . 111
Older Children . . . . . . . . . . . . . . . . 104
Securing . . . . . . . . . . . . 120, 122, 123
Systems . . . . . . . . . . . . . . . . . . . . . . 108
Child-View Mirror . . . . . . . . . . . . . . . . 60
Circuit Breakers . . . . . . . . . . . . . . . . 329
Cleaning Exterior Care . . . . . . . . . . . . . . . . . 383
Interior Care . . . . . . . . . . . . . . . . . . 388
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . 191
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Cluster, Instrument . . . . . . . . . . . . . 143
Collision Damage Repair . . . . . . . 418
Compartments
Storage . . . . . . . . . . . . . . . . . . . . . . . 126
Compass . . . . . . . . . . . . . . . . . . . . . . . 136
Connected Services
Connections . . . . . . . . . . . . . . . . . . 434
Diagnostics . . . . . . . . . . . . . . . . . . . 436 Connected Services (cont'd)
Navigation . . . . . . . . . . . . . . . . . . . . 433
Connections Connected Services . . . . . . . . . . 434
Control Hill Descent . . . . . . . . . . . . . . . . . . 244
Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . 242
Control of a Vehicle . . . . . . . . . . . . . 201
Convenience Net . . . . . . . . . . . . . . . 129
Convex Mirrors . . . . . . . . . . . . . . . . . . 56
Coolant
Engine Temperature Gauge . . 148
Engine TemperatureWarning Light . . . . . . . . . . . . . . . 158
Cooling . . . . . . . . . . . . . . . . . . . . 191, 195
Cooling System . . . . . . . . . . . . . . . . . 310
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . 417
Cruise Control . . . . . . . . . . . . . . . . . . 245 Light . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Cruise Control, Adaptive . . . . . . . . 248
Cupholders . . . . . . . . . . . . . . . . . . . . . 126
Customer Assistance . . . . . . . . . . . 414 Offices . . . . . . . . . . . . . . . . . . . . . . . . 413
Text Telephone (TTY)Users . . . . . . . . . . . . . . . . . . . . . . . 414 Customer Information
Publications Ordering
Information . . . . . . . . . . . . . . . . . . 420
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . 411
D
Damage Repair, Collision . . . . . . . 418
Danger, Warning, and Caution . . . . 2
Data CollectionInfotainment System . . . . . . . . . . 424
OnStar . . . . . . . . . . . . . . . . . . . . . . . 424
Data Recorders, Event . . . . . . . . . 423
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 184
Defensive Driving . . . . . . . . . . . . . . . 201
Delayed Locking . . . . . . . . . . . . . . . . . 45
Diagnostics Connected Services . . . . . . . . . . 436
Distracted Driving . . . . . . . . . . . . . . . 200
Dome Lamps . . . . . . . . . . . . . . . . . . . 187
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . 161
Delayed Locking . . . . . . . . . . . . . . . . 45
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Power Locks . . . . . . . . . . . . . . . . . . . . 45
Drive Belt Routing, Engine . . . . . . 410
Driver Assistance Systems . . . . . 255

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
440 Index
Driver InformationCenter (DIC) . . . . . . . . . . . . . . . . . . 161
Driving Assistance Systems . . . . . . . . . . 260
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 273
Defensive . . . . . . . . . . . . . . . . . . . . . 201
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 201
For Better Fuel Economy . . . . . . . 27
Hill and Mountain Roads . . . . . . 209
If the Vehicle is Stuck . . . . . . . . . .211
Loss of Control . . . . . . . . . . . . . . . 203
Off-Road . . . . . . . . . . . . . . . . . . . . . 203
Off-Road Recovery . . . . . . . . . . . 202
Vehicle Load Limits . . . . . . . . . . . 212
Wet Roads . . . . . . . . . . . . . . . . . . . 208
Winter . . . . . . . . . . . . . . . . . . . . . . . . 209
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 191
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 270
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 294
Electrical System Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 330
Fuses and Circuit Breakers . . . 329 Electrical System (cont'd)
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 334, 337
Overload . . . . . . . . . . . . . . . . . . . . . 329
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 339
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 426
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 309
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 153
Compartment Overview . . . . . . . 299
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 148
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 158
Cooling System . . . . . . . . . . . . . . . 310
Drive Belt Routing . . . . . . . . . . . . 410
Exhaust . . . . . . . . . . . . . . . . . . . . . . 227
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Heater . . . . . . . . . . . . . . . . . . . . . . . . 223
Oil Life System . . . . . . . . . . . . . . . 304
Oil Pressure Gauge . . . . . . . . . . 147
Oil Pressure Light . . . . . . . . . . . . 159
Overheating . . . . . . . . . . . . . . . . . . 313
Power Messages . . . . . . . . . . . . . 168
Running While Parked . . . . . . . . 228 Engine (cont'd)
Starting . . . . . . . . . . . . . . . . . . . . . . . 221
Entry Lighting . . . . . . . . . . . . . . . . . . . 188
Equipment, Towing . . . . . . . . . . . . . 284
Event Data Recorders . . . . . . . . . . 423
Exit Lighting . . . . . . . . . . . . . . . . . . . . 188
Extended Parking . . . . . . . . . . . . . . . 226
Extender, Seat Belt . . . . . . . . . . . . . . 90
Exterior Lamp Controls . . . . . . . . . 181
Exterior Lamps Off Reminder . . . 183
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 189
F
FanEngine . . . . . . . . . . . . . . . . . . . . . . . . 315
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . 309
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 184
Flashers, Hazard Warning . . . . . . 185
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 362 Changing . . . . . . . . . . . . . . . . . . . . . 363
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Floor Console Storage . . . . . . . . . . 129
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 391