2020 GMC YUKON fog light

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
172 Lighting
interior lamps remain on for a set
amount of time, then automatically
turn off.
The exterior lamps turn off
immediately by turning the exterior
lamp control off.
This feature can be changed. See
Vehicle Personalization0152.
Battery Load
Management
The vehicle has Electric Power
Management (EPM), which
estimates the battery's temperature
and state of charge. It then adjusts
the voltage for best performance
and extended life of the battery.
When the battery's state of charge
is low, the voltage is raised slightly
to quickly bring the charge back up.
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
This feature shuts off the dome and
reading lamps if they are left on for
more than 10 minutes when the
ignition is off. This will keep the
battery from running down.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Climate Controls 177
Air Delivery Mode Control :Press
Y,\,[, or-to change the
direction of the airflow. An indicator
light comes on in the selected mode
button.
Changing the mode cancels the
automatic operation of the mode.
Press AUTO to return to automatic
operation.
Y: Air is directed to the instrument
panel outlets.
\: Air is divided between the
instrument panel and floor outlets.
[: Air is directed to the floor
outlets, with some to the windshield,
side window outlets, and second
row floor outlets.
-: This mode clears the windows
of fog or moisture. Air is directed to
the windshield, floor outlets, and
side window vents.
0: Press to clear the windshield
of fog or frost more quickly. Air is
directed to the windshield and the
side window vents. The system
automatically forces outside air into
the vehicle and the air conditioning compressor will run, unless the
outside temperature is close to
freezing.
Do not drive the vehicle until all
windows are clear.
See
Air Vents 0180.
A/C : Press to turn the air
conditioning system on or off. An
indicator light comes on to show
that the air conditioning is enabled.
If the fan is turned off, the air
conditioner will not run. The A/C
light will stay on even if the outside
temperatures are below freezing.
@: Press to turn on recirculation.
An indicator light comes on. Air is
recirculated to quickly cool the
inside of the vehicle. It can also be
used to help reduce outside air and
odors that enter the vehicle. The air
conditioning compressor also comes
on when this mode is activated.
Auto Defog : The climate control
system uses a sensor to
automatically detect high humidity
inside the vehicle. When high
humidity is detected, the climate
control system may adjust to outside air supply, turn on the air
conditioner, and direct more air to
the windshield. If the climate control
system does not detect possible
window fogging, it returns to normal
operation. To turn Auto Defog off or
on, see
“Climate and Air Quality”
under Vehicle Personalization
0 152.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
K:Press to turn the rear window
defogger on or off. An indicator light
on the button comes on to show that
the rear window defogger is on.
The rear window defogger only
works when the ignition is on. The
defogger turns off if the ignition is
turned off or to ACC/ACCESSORY.
The rear window defogger can be
set to automatic operation. When
Auto Rear Defog is selected, the
rear window defogger turns on
automatically when the vehicle is
first started in cold weather and
turns off when the vehicle is

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Vehicle Care 281
Vehicle Care
General Information
General Information . . . . . . . . . . 282
California Proposition65 Warning . . . . . . . . . . . . . . . . . 282
California Perchlorate Materials Requirements . . . . . 283
Accessories and Modifications . . . . . . . . . . . . . . . . 283
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 283
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 284
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 286
Engine Oil . . . . . . . . . . . . . . . . . . . . 289
Engine Oil Life System . . . . . . . 291
Automatic Transmission Fluid (6-Speed Transmission) . . . . . 292
Automatic Transmission Fluid (10-Speed Transmission) . . . 295
Engine Air Cleaner/Filter . . . . . . 296
Cooling System . . . . . . . . . . . . . . 297
Engine Overheating . . . . . . . . . . 300
Engine Fan . . . . . . . . . . . . . . . . . . . 302
Washer Fluid . . . . . . . . . . . . . . . . . 302
Brakes . . . . . . . . . . . . . . . . . . . . . . . 303 Brake Fluid . . . . . . . . . . . . . . . . . . . 304
Battery - North America . . . . . . 305
Four-Wheel Drive . . . . . . . . . . . . . 305
Front Axle . . . . . . . . . . . . . . . . . . . . 306
Rear Axle . . . . . . . . . . . . . . . . . . . . 306
Noise Control System . . . . . . . . 306
Starter Switch Check . . . . . . . . . 308
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 308
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . 308
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 309
Wiper Blade Replacement . . . . 309
Glass Replacement . . . . . . . . . . 310
Windshield Replacement . . . . . 310
Gas Strut(s) . . . . . . . . . . . . . . . . . . 310
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 312
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 312
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 312
LED Lighting . . . . . . . . . . . . . . . . . 312
Fog Lamps . . . . . . . . . . . . . . . . . . . 312
Back-Up Lamps . . . . . . . . . . . . . . 313
License Plate Lamp . . . . . . . . . . 314
Electrical System
Electrical System Overload . . . 314
Fuses and Circuit Breakers . . . 315
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 315
Instrument Panel Fuse Block
(Right) . . . . . . . . . . . . . . . . . . . . . . 320
Instrument Panel Fuse Block (Left) . . . . . . . . . . . . . . . . . 323
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 325
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 326
All-Season Tires . . . . . . . . . . . . . . 327
Winter Tires . . . . . . . . . . . . . . . . . . 328
Low-Profile Tires . . . . . . . . . . . . . 328
All-Terrain Tires . . . . . . . . . . . . . . . 328
Tire Sidewall Labeling . . . . . . . . 329
Tire Designations . . . . . . . . . . . . . 330
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 331
Tire Pressure . . . . . . . . . . . . . . . . . 333
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 334
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 335
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 336
Tire Inspection . . . . . . . . . . . . . . . . 340

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
312 Vehicle Care
Headlamp Aiming
Headlamp aim has been preset and
should need no further adjustment.
If the vehicle is damaged in a crash,
the headlamp aim may be affected.
If adjustment to the headlamps is
necessary, see your dealer.
Bulb Replacement
For the proper type of replacement
bulbs, or any bulb changing
procedure not listed in this section,
contact your dealer.
Caution
Do not replace incandescent
bulbs with aftermarket LED
replacement bulbs. This can
cause damage to the vehicle
electrical system.
High Intensity Discharge
(HID) Lighting
{Warning
The High Intensity Discharge
(HID) lighting system operates at
a very high voltage. If you try to
service any of the system
components, you could be
seriously injured. Have your
dealer or a qualified technician
service them.After an HID headlamp bulb has
been replaced, the beam might be a
slightly different shade than it was
originally. This is normal.
LED Lighting
This vehicle has several LED lamps.
For replacement of any LED lighting
assembly, contact your dealer.
Fog Lamps
To replace the front fog lamp bulb:
1. Locate the fog lamp under the front bumper.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Vehicle Care 373
.Never rub any surface
aggressively or with too much
pressure.
. Do not use laundry detergents or
dishwashing soaps with
degreasers. For liquid cleaners,
use approximately 20 drops per
3.8 L (1 gal) of water.
A concentrated soap solution will
create streaks and attract dirt.
Do not use solutions that contain
strong or caustic soap.
. Do not heavily saturate the
upholstery when cleaning.
. Do not use solvents or cleaners
containing solvents.
Interior Glass
To clean, use a terry cloth fabric
dampened with water. Wipe droplets
left behind with a clean dry cloth.
If necessary, use a commercial
glass cleaner after cleaning with
plain water.
Caution
To prevent scratching, never use
abrasive cleaners on automotive
glass. Abrasive cleaners or
aggressive cleaning may damage
the rear window defogger.
Cleaning the windshield with water
during the first three to six months
of ownership will reduce tendency
to fog.
Speaker Covers
Vacuum around a speaker cover
gently, so that the speaker will not
be damaged. Clean spots with water
and mild soap.
Coated Moldings
Coated moldings should be cleaned.
. When lightly soiled, wipe with a
sponge or soft, lint-free cloth
dampened with water.
. When heavily soiled, use warm
soapy water.
Fabric/Carpet/Suede
Start by vacuuming the surface
using a soft brush attachment. If a
rotating vacuum brush attachment is
being used, only use it on the floor
carpet. Before cleaning, gently
remove as much of the soil as
possible:
.Gently blot liquids with a paper
towel. Continue blotting until no
more soil can be removed.
. For solid soils, remove as much
as possible prior to vacuuming.
To clean: 1. Saturate a clean, lint-free colorfast cloth with water.
Microfiber cloth is
recommended to prevent lint
transfer to the fabric or carpet.
2. Remove excess moisture by gently wringing until water does
not drip from the cleaning cloth.
3. Start on the outside edge of the soil and gently rub toward the
center. Fold the cleaning cloth

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13566587) - 2020 - CRC - 4/15/19
422 Index
Assistance Program,Roadside . . . . . . . . . . . . . . . . . . . . . . 400
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . . 245
Assistance Systems for Parking and Backing . . . . . . . . . . 242
Automatic
Dimming Mirrors . . . . . . . . . . . . . . . . 39
Door Locks . . . . . . . . . . . . . . . . . . . . . 25
Emergency Braking (AEB) . . . . 248
Headlamp System . . . . . . . . . . . . 167
Level Control . . . . . . . . . . . . . . . . . 229
Transmission . . . . . . . . . . . . . . . . . 213
Transmission Fluid . . . . . . 292, 295
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . 216
Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 308
Axle, Front . . . . . . . . . . . . . . . . . . . . . . 306
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 306
B
Battery Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . 173
Load Management . . . . . . . . . . . . 172 Battery (cont'd)
Power Protection . . . . . . . . . . . . . 172
Battery - North America . . . . 305, 360
Blade Replacement, Wiper . . . . . 309
Blind Spot Mirrors . . . . . . . . . . . . . . . 39
Brake Pedal and AdjustableThrottle . . . . . . . . . . . . . . . . . . . . . . 201
System Warning Light . . . . . . . . 138
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 303 Antilock . . . . . . . . . . . . . . . . . . . . . . . 224
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 225
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 304
Parking . . . . . . . . . . . . . . . . . . . . . . . 225
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 186 AutomaticEmergency (AEB) . . . . . . . . . . . 248
Break-In, New Vehicle . . . . . . . . . . 201
Bulb Replacement
Back-up Lamps . . . . . . . . . . . . . . . 313
Fog Lamps . . . . . . . . . . . . . . . . . . . 312
Headlamp Aiming . . . . . . . . . . . . . 312
Headlamps . . . . . . . . . . . . . . . . . . . 312
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . . . 312
License Plate Lamps . . . . . . . . . 314
Buying New Tires . . . . . . . . . . . . . . . 342
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 119
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . 283
California Proposition
65 Warning . . . . . . . . . .282, 305, 360, Back Cover
Canadian Vehicle Owners . . . . . . . . 2
Capacities and
Specifications . . . . . . . . . . . . . . . . . 393
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 212
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . 27
Winter Driving . . . . . . . . . . . . . . . . 194
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . .112
Caution, Danger, and Warning . . . . 3
Center Console Storage . . . . . . . . 110
Center Seat . . . . . . . . . . . . . . . . . . . . . 48
Chains, Tire . . . . . . . . . . . . . . . . . . . . 347
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . 122
Charging System Light . . . . . . . . . 135
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 136

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13566587) - 2020 - CRC - 4/15/19
Index 425
Fluid (cont'd)Four-Wheel Drive
Transfer Case . . . . . . . . . . . . . . . 219
Washer . . . . . . . . . . . . . . . . . . . . . . . 302
Fog Lamps . . . . . . . . . . . . . . . . . . . . . 169 Bulb Replacement . . . . . . . . . . . . 312
Folding Mirrors . . . . . . . . . . . . . . . . . . 38
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . 245
Four-Wheel Drive . . . . . . . . . . 219, 305
Four-Wheel-Drive Light . . . . . . . . . 139
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 405
Front Axle . . . . . . . . . . . . . . . . . . . . . . 306
Front Fog Lamp
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Front Seats Heated and Ventilated . . . . . . . . . . 54
Fuel Additives . . . . . . . . . . . . . . . . . . . . . 255
Economy, Driving for Better . . . 184
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 258
Filling the Tank . . . . . . . . . . . . . . . 256
Foreign Countries . . . . . . . . . . . . 255
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 130
Low Fuel Warning Light . . . . . . . 142
Management, Active . . . . . . . . . . .211 Fuel (cont'd)
Prohibited Fuels . . . . . . . . . . . . . . 255
Recommended . . . . . . . . . . . . . . . 254
Top Tier . . . . . . . . . . . . . . . . . . . . . . 254
Full-Size Spare Tire . . . . . . . . . . . . 359
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 315
Fuses and Circuit Breakers . . . 315
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 320, 323
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 325
G
Garage Door Opener . . . . . . . . . . . 160Programming . . . . . . . . . . . . . . . . . 160
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 310
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . . 131
Engine Oil Pressure . . . . . . . . . . 130
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Odometer . . . . . . . . . . . . . . . . . . . . . 129
Speedometer . . . . . . . . . . . . . . . . . 129
Tachometer . . . . . . . . . . . . . . . . . . . 129
Transmission Temperature . . . . 132
Trip Odometer . . . . . . . . . . . . . . . . 129 Gauges (cont'd)
Voltmeter . . . . . . . . . . . . . . . . . . . . . 133
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . 125
General Information Service and Maintenance . . . . . 377
Towing . . . . . . . . . . . . . . . . . . . . . . . . 259
Vehicle Care . . . . . . . . . . . . . . . . . . 282
Glass Replacement . . . . . . . . . . . . . 310
Glove Box . . . . . . . . . . . . . . . . . . . . . . 109
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . 399
H
Hazard Warning Flashers . . . . . . . 168
Head Restraints . . . . . . . . . . . . . . . . . 47
Head-up Display . . . . . . . . . . . . . . . . 147
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 312
Automatic . . . . . . . . . . . . . . . . . . . . . 167
Bulb Replacement . . . . . . . . . . . . 312
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . 167
Flash-to-Pass . . . . . . . . . . . . . . . . . 167
High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . . . 312
High-Beam On Light . . . . . . . . . . 143
High/Low Beam Changer . . . . . 166

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13566587) - 2020 - CRC - 4/15/19
Index 427
Lighting (cont'd)LED . . . . . . . . . . . . . . . . . . . . . . . . . . 312
Lights Airbag Readiness . . . . . . . . . . . . . 134
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . 138
Brake System Warning . . . . . . . 138
Charging System . . . . . . . . . . . . . 135
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . 136
Cruise Control . . . . . . . . . . . . . . . . 144
Door Ajar . . . . . . . . . . . . . . . . . . . . . 144
Engine Coolant Temperature Warning . . . . . . . 141
Engine Oil Pressure . . . . . . . . . . 142
Flash-to-Pass . . . . . . . . . . . . . . . . . 167
Four-Wheel-Drive . . . . . . . . . . . . . 139
Front Fog Lamp . . . . . . . . . . . . . . 143
High-Beam On . . . . . . . . . . . . . . . . 143
High/Low Beam Changer . . . . . 166
Lane Keep Assist . . . . . . . . . . . . . 139
Low Fuel Warning . . . . . . . . . . . . 142
Seat Belt Reminders . . . . . . . . . . 133
Security . . . . . . . . . . . . . . . . . . . . . . 143
StabiliTrak OFF . . . . . . . . . . . . . . . 140
Tire Pressure . . . . . . . . . . . . . . . . . 141
Tow/Haul Mode . . . . . . . . . . . . . . . 139 Lights (cont'd)
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . 141
Traction Off . . . . . . . . . . . . . . . . . . . 140
Lock Steering Column . . . . . . . . . . . . . . . . 35
Locking Rear Axle . . . . . . . . . . . . . . 229
Locks Automatic Door . . . . . . . . . . . . . . . . . 25
Delayed Locking . . . . . . . . . . . . . . . . 25
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Lockout Protection . . . . . . . . . . . . . . 26
Power Door . . . . . . . . . . . . . . . . . . . . . 25
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Loss of Control . . . . . . . . . . . . . . . . . 187
Low Fuel Warning Light . . . . . . . . . 142
Low-Profile Tires . . . . . . . . . . . . . . . . 328
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . . . 93
Lumbar Adjustment . . . . . . . . . . . . . . 49 Front Seats . . . . . . . . . . . . . . . . . . . . . 49
M
Magnetic Ride Control . . . . . . . . . . 229
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . 391 Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . 385
Maintenance Schedule . . . . . . . . . 379 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 388
Transfer Case . . . . . . . . . . . . . . . . 219
Malfunction Indicator Lamp . . . . . 136
Manual Mode . . . . . . . . . . . . . . . . . . . 216
Memory Seats . . . . . . . . . . . . . . . . . . . 51
Messages Engine Power . . . . . . . . . . . . . . . . 151
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 151
Vehicle Speed . . . . . . . . . . . . . . . . 152
Mirror Child-View . . . . . . . . . . . . . . . . . . . . . . 41
Mirrors
Automatic Dimming . . . . . . . . . . . . . 39
Automatic DimmingRearview . . . . . . . . . . . . . . . . . . . . . . 41
Blind Spot . . . . . . . . . . . . . . . . . . . . . . 39
Convex . . . . . . . . . . . . . . . . . . . . . . . . . 37
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 38
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 39
Manual Rearview . . . . . . . . . . . . . . . 41
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Tilt in Reverse . . . . . . . . . . . . . . . . . . 40
Mirrors, Interior Rearview . . . . . . . . 41