
GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
362 Vehicle Care
Caution (Continued)
when necessary. Use chains that
are the proper size for the tires.
Install them on the rear tires only.
Do not use chains on the front
tires. Tighten them as tightly as
possible with the ends securely
fastened. Drive slowly and follow
the chain manufacturer's
instructions. If the chains contact
the vehicle, stop and retighten
them. If the contact continues,
slow down until it stops. Driving
too fast or spinning the wheels
with chains on will damage the
vehicle.
If a Tire Goes Flat
It is unusual for a tire to blowout
while driving, especially if the tires
are maintained properly. If air goes
out of a tire, it is much more likely to
leak out slowly. But if there ever is a
blowout, here are a few tips about
what to expect and what to do:If a front tire fails, the flat tire
creates a drag that pulls the vehicle
toward that side. Take your foot off
the accelerator pedal and grip the
steering wheel firmly. Steer to
maintain lane position, and then
gently brake to a stop, well off the
road, if possible.
A rear blowout, particularly on a
curve, acts much like a skid and
may require the same correction as
used in a skid. Stop pressing the
accelerator pedal and steer to
straighten the vehicle. It may be
very bumpy and noisy. Gently brake
to a stop, well off the road,
if possible.
{Warning
Driving on a flat tire will cause
permanent damage to the tire.
Re-inflating a tire after it has been
driven on while severely
underinflated or flat may cause a
blowout and a serious crash.
Never attempt to re-inflate a tire
(Continued)
Warning (Continued)
that has been driven on while
severely underinflated or flat.
Have your dealer or an authorized
tire service center repair or
replace the flat tire as soon as
possible.
{Warning
Lifting a vehicle and getting under
it to do maintenance or repairs is
dangerous without the
appropriate safety equipment and
training. If a jack is provided with
the vehicle, it is designed only for
changing a flat tire. If it is used for
anything else, you or others could
be badly injured or killed if the
vehicle slips off the jack. If a jack
is provided with the vehicle, only
use it for changing a flat tire.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
380 Vehicle Care
Four-Wheel-Drive Vehicles
Only dinghy tow four-wheel-drive
vehicles with a two speed transfer
case that have a N (Neutral) and a 4
nsetting.
{Warning
Shifting a four-wheel-drive
vehicle's transfer case into
N (Neutral) can cause the vehicle
to roll even if the transmission is
in P (Park). You or others could
be injured. Set the parking brake
before shifting the transfer case
to N (Neutral).To dinghy tow:
1. Position the vehicle being towed behind the tow vehicle,
facing forward and on a level
surface.
2. Securely attach the vehicle being towed to the tow vehicle.
3. Apply the parking brake and start the engine.
4. Shift the transfer case to N (Neutral). See “Shifting into
N (Neutral)” underFour-Wheel
Drive 0234. Check that the
vehicle is in N (Neutral) by
starting the engine and shifting
the transmission to
R (Reverse) and then to D
(Drive). There should be no
movement of the vehicle while
shifting.
5. Shift the transmission into D (Drive). Turn the engine off.
Caution
Failure to disconnect the negative
battery cable or to have it contact
the terminals can cause damage
to the vehicle.
6. Disconnect the negative battery cable at the battery and
secure the nut and bolt. Cover
the negative battery post with a
non-conductive material to
prevent any contact with the
negative battery terminal.
7. Shift the transmission to P (Park).
Caution
If the steering column is locked,
vehicle damage may occur.
8. Move the steering wheel to make sure the steering column
is unlocked.
9. With a foot on the brake pedal, release the parking brake.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
Vehicle Care 381
10. Keep the ignition key in thetowed vehicle in ACC/
ACCESSORY to prevent the
steering column from locking.
If equipped with Keyless
Access, keep the RKE
transmitter outside of the
vehicle, and manually lock the
doors. Access the vehicle as if
it has a dead RKE transmitter
battery, by using the key in the
door lock.
Disconnecting the Towed Vehicle
Before disconnecting the towed
vehicle: 1. Park on a level surface.
2. Set the parking brake, then shift the transmission to
P (Park).
3. Connect the battery.
4. Apply the brake pedal.
5. Turn the ignition to ON/RUN with the engine off. Shift the
transfer case out of N (Neutral)
to 2
m. See “Shifting out of
N (Neutral)” underFour-Wheel Drive
0234. See your dealer if
the transfer case cannot be
shifted out of N (Neutral).
6. Check that the vehicle is in 2
m
by starting the engine and
shifting the transmission to
R (Reverse) and then to D
(Drive). There should be
movement of the vehicle while
shifting.
7. Shift the transmission to P (Park) and turn off the
ignition.
8. Disconnect the vehicle from the tow vehicle.
9. Release the parking brake.
10. Reset any lost presets. The outside temperature
display will default to 0 °C
(32 °F) but will reset with
normal usage.
Dolly Towing –Front Towing
(Front Wheels Off the Ground)
Caution
If a two-wheel-drive vehicle is
towed with the rear wheels on the
ground, the transmission could be
damaged. The repairs would not
be covered by the vehicle
warranty. Never tow the vehicle
with the rear wheels on the
ground.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
396 Service and Maintenance
.Inspect brake system. See
Exterior Care 0383.
. Visually inspect steering,
suspension, and chassis
components for damage,
including cracks or tears in the
rubber boots, loose or missing
parts, or signs of wear at least
once a year. See Exterior Care
0 383. Lubricate the suspension
and steering components at
least every other oil change (if
equipped with grease fittings).
. Inspect power steering for
proper attachment, connections,
binding, leaks, cracks,
chafing, etc.
. Visually inspect halfshafts and
drive shafts for excessive wear,
lubricant leaks, and/or damage
including: tube dents or cracks,
constant velocity joint or
universal joint looseness,
cracked or missing boots, loose
or missing boot clamps, center
bearing excessive looseness,
loose or missing fasteners, and
axle seal leaks. .
Check restraint system
components. See Safety System
Check 090.
. Visually inspect fuel system for
damage or leaks.
. Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.
. Lubricate body components. See
Exterior Care 0383.
. Check starter switch. See Starter
Switch Check 0321.
. Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function Check
0322.
. Check ignition transmission lock.
See Ignition Transmission Lock
Check 0322.
. Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 322. .
Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
. Visually inspect gas strut for
signs of wear, cracks, or other
damage. Check the hold open
ability of the strut. If the hold
open is low, service the gas
strut. See Gas Strut(s) 0324.
. Inspect sunroof track and seal,
if equipped. See Sunroof063.
. Verify spare tire key lock
operation and lubricate as
needed. See Tire Changing
0 363.
. Visually inspect the spare tire to
ensure that it is tightly stowed
under the vehicle. Push, pull,
and try to turn the tire. If the
spare tire moves, tighten as
necessary. Verify that the wheel
retainer plate compression
spring is fully compressed. See
Tire Changing 0363.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
402 Service and Maintenance
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 0388 and
Exterior Care 0383.
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.
Windshield
For safety, appearance, and the
best viewing, keep the windshield
clean and clear.
. Signs of damage include
scratches, cracks, and chips.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
442 Index
Headlamps (cont'd)High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . . . 326
High-Beam On Light . . . . . . . . . . 160
High/Low Beam Changer . . . . . 183
Lamps On Reminder . . . . . . . . . 160
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . 74
Steering Wheel . . . . . . . . . . . . . . . 133
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Heated Mirrors . . . . . . . . . . . . . . . . . . . 58
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 223
Heating . . . . . . . . . . . . . . . . . . . . 191, 195
High-Beam On Light . . . . . . . . . . . . 160
High-Speed Operation . . . . . . . . . . 349
Hill and Mountain Roads . . . . . . . . 209
Hill Descent Control (HDC) . . . . . 244
Hill Start Assist (HSA) . . . . . . . . . . 241
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . 82
HVAC . . . . . . . . . . . . . . . . . . . . . . 191, 195I
Ignition Positions . . . . . . . . . . 217, 219
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 322
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 55
Indicator
Vehicle Ahead . . . . . . . . . . . . . . . . 157
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . 106
Information
Publication Ordering . . . . . . . . . . 420
Infotainment . . . . . . . . . . . . . . . . . . . . 190
Infotainment System . . . . . . . . . . . . 424
Instrument Cluster . . . . . . . . . . . . . . 143
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . 126
Interior Rearview Mirrors . . . . . . . . . 60
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 374
K
Keyless EntryRemote (RKE) System . . . . . 34, 41
Keys . . . . . . . . . . . . . . . . . . . . . . . . . 29, 30
L
Labeling, Tire Sidewall . . . . . . . . . . 343
Lamps Daytime Running (DRL) . . . . . . 184
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 187
Exterior Controls . . . . . . . . . . . . . . 181
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . 183
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . 189
License Plate . . . . . . . . . . . . . . . . . 328
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . 153
On Reminder . . . . . . . . . . . . . . . . . 160
Reading . . . . . . . . . . . . . . . . . . . . . . 187
Lane Change Alert (LCA) . . . . . . . 264
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . 266
Lane Keep Assist (LKA) . . . . . . . . 266
Lane Keep Assist Light . . . . . . . . . 156
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . . 89
Lap-Shoulder Belt . . . . . . . . . . . . . . . 84
LATCH System Replacing Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . 120
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . 111
LED Lighting . . . . . . . . . . . . . . . . . . . . 326

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
446 Index
Seats (cont'd)Memory . . . . . . . . . . . . . . . . . . . . . . . . . 69
Power Adjustment, Front . . . . . . . 67
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Reclining Seatbacks . . . . . . . . . . . . 69
Second Row . . . . . . . . . . . . . . . . . . . . 75
Third Row Seat . . . . . . . . . . . . . . . . . 79
Second Row Seats . . . . . . . . . . . . . . 75
Securing Child Restraints . . . . . . . . . . .120, 122, 123
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 160
OnStar . . . . . . . . . . . . . . . . . . . . . . . 427
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 53
Vehicle Alarm . . . . . . . . . . . . . . . . . . . 53
Service . . . . . . . . . . . . . . . . . . . . . . . . . 198 Accessories andModifications . . . . . . . . . . . . . . . . 297
Doing Your Own Work . . . . . . . . 297
Maintenance Records . . . . . . . . 407
Maintenance, General Information . . . . . . . . . . . . . . . . . . 393
Parts Identification Label . . . . . 408
Scheduling Appointments . . . . . 417
Services Special Application . . . . . . . . . . . 400
Servicing the Airbag . . . . . . . . . . . . 102 Shift Lock Control Function
Check, Automatic
Transmission . . . . . . . . . . . . . . . . . . 322
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 224
Out of Park . . . . . . . . . . . . . . . . . . . 226
Side Blind Zone Alert (SBZA) . . . 264
Signals, Turn and
Lane-Change . . . . . . . . . . . . . . . . . 185
Special Application Services . . . . 400
Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 409
Speedometer . . . . . . . . . . . . . . . . . . . 146
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . 157
Start Assist, Hill . . . . . . . . . . . . . . . . . 241
Start Vehicle, Remote . . . . . . . . . . . 43
Starter Switch Check . . . . . . . . . . . 321
Starting the Engine . . . . . . . . . . . . . 221
Steering . . . . . . . . . . . . . . . . . . . . . . . . 202 Heated Wheel . . . . . . . . . . . . . . . . 133
Wheel Adjustment . . . . . . . . . . . . 132
Wheel Controls . . . . . . . . . . . . . . . 133
Steps Power Assist . . . . . . . . . . . . . . . . . . . 52
Storage Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Storage Areas
Armrest . . . . . . . . . . . . . . . . . . . . . . . 127
Center Console . . . . . . . . . . . . . . . 128
Convenience Net . . . . . . . . . . . . . 129
Floor Console . . . . . . . . . . . . . . . . 129
Glove Box . . . . . . . . . . . . . . . . . . . . 126
Instrument Panel . . . . . . . . . . . . . 126
Roof Rack System . . . . . . . . . . . . 129
Sunglasses . . . . . . . . . . . . . . . . . . . 127
Storage Compartments . . . . . . . . . 126
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 211
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 62
Sunglass Storage . . . . . . . . . . . . . . . 127
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . . 260
Infotainment . . . . . . . . . . . . . 190, 424
Noise Control . . . . . . . . . . . . . . . . . 320
Roof Rack . . . . . . . . . . . . . . . . . . . . 129
Systems Driver Assistance . . . . . . . . . . . . . 255