shift lock GMC YUKON 2020 Owner's Manual

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Keys, Doors, and Windows 25
Free-Turning Locks
The door key lock cylinder turns
freely when either the wrong key is
used, or the correct key is not fully
inserted. The free-turning door lock
feature prevents the lock from being
forced open. To reset the lock, turn
it to the vertical position with the
correct key fully inserted. Remove
the key and insert it again. If this
does not reset the lock, turn the key
halfway around in the cylinder and
repeat the reset procedure.
Power Door Locks
PressQorKon the Remote
Keyless Entry (RKE) transmitter.
See Remote Keyless Entry (RKE)
System Operation (Key Access)
0 13 or
Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0 16.
Q:Press to lock the doors.
K:Press to unlock the doors.
Delayed Locking
This feature delays the locking of
the doors until five seconds after all
doors are closed.
Delayed locking can only be turned
on when the Unlocked Door
Anti-Lockout feature has been
turned off. When
Qis pressed on the power
door lock switch while the door is
open, a chime will sound three
times indicating delayed locking is
active.
The doors will lock automatically
five seconds after all doors are
closed. If a door is reopened before
that time, the five-second timer will
reset when all doors are closed
again.
Press
Qon the door lock switch
again or press
Qon the RKE
transmitter to lock the doors
immediately.
This feature can be programmed.
See “Delayed Door Lock” under
Vehicle Personalization 0152.
Automatic Door Locks
The doors will lock automatically
when all doors are closed, the
ignition is on, and the vehicle is
shifted out of P (Park).
If a vehicle door is unlocked, and
then opened and closed, the doors
will lock either when your foot is

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
26 Keys, Doors, and Windows
removed from the brake or the
vehicle speed becomes faster than
13 km/h (8 mph).
To unlock the doors:
.Press
Kon the power door lock
switch.
. Shift the transmission into
P (Park).
Automatic door locking cannot be
disabled. Automatic door unlocking
can be programmed. See Vehicle
Personalization 0152.
Lockout Protection
Key Access : When locking is
requested with the driver door open
and the key in the ignition, all the
doors will lock and then the driver
door will unlock.
This can be manually overridden by
pressing and holding
Qon the
power door lock switch. Keyless Access :
When locking is
requested with the driver door open
and the vehicle is on or in ACC/
ACCESSORY, all the doors will lock
and then the driver door will unlock.
If the vehicle is off and locking is
requested while a door is open,
when all doors are closed the
vehicle will check for RKE
transmitters inside. If an RKE
transmitter is detected and the
number of RKE transmitters inside
has not reduced, the driver door will
unlock and the horn will sound three
times.
This can be manually overridden by
pressing and holding
Qon the
power door lock switch.
Unlocked Door Anti-Lockout
If Unlocked Door Anti-Lockout is
turned on and the vehicle is off, the
driver door is open, and locking is
requested, all the doors will lock and
the driver door will remain open.
The Unlocked Door Anti-Lockout
feature can be turned on or off. See
Vehicle Personalization 0152.
Safety Locks
The rear door safety locks prevent
passengers from opening the rear
doors from inside the vehicle.
Press{to activate the safety locks
on the rear doors. The indicator light
comes on when activated.
Press
{again to deactivate the
safety locks.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Keys, Doors, and Windows 29
.Pressbtwice quickly on the
RKE transmitter until the liftgate
moves.
. Press
8on the overhead
console. The driver door must
be unlocked or locked without
the security armed.
. Press the touch pad on the
underside of the liftgate handle
after unlocking all doors.
If equipped with Keyless Access,
a locked vehicle can be opened
if the RKE transmitter is within
1 m (3 ft) of the touch pad.
.Presslon the bottom edge of
the liftgate next to the latch to
close.
Press any liftgate button, the touch
pad, or
bon the RKE transmitter
while the liftgate is moving to stop it.
Pressing any liftgate button or
pressing
btwice quickly on the
RKE transmitter restarts the
operation in the reverse direction.
Pressing the touch pad on the
liftgate handle will restart the
motion, but only in the opening
direction.
Caution
Manually forcing the liftgate to
open or close during a power
cycle can damage the vehicle.
Allow the power cycle to
complete.
The power liftgate may be
temporarily disabled in extremely
low temperatures, or after repeated
power cycling over a short period of time. If this occurs, the liftgate can
still be operated manually. Select
OFF on the liftgate switch.
If the vehicle is shifted out of
P (Park) while the power function is
in progress, the liftgate will continue
to completion. If the vehicle is
accelerated before the liftgate has
completed moving, the liftgate may
stop or reverse direction. Check for
Driver Information Center (DIC)
messages and make sure the
liftgate is closed and latched before
driving.
Falling Liftgate Detection
If the power liftgate automatically
closes after a power opening cycle,
it indicates that the system is
reacting to excess weight on the
liftgate or a possible support strut
failure. Remove any excess weight.
A repetitive chime will sound while
the falling liftgate detection feature
is operating. If the liftgate continues
to automatically close after opening,
see your dealer for service before
using the power liftgate.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Seats and Restraints 53
Auto Memory Recall
The vehicle identifies the number of
the current driver’s RKE transmitter
(1–8). See Remote Keyless Entry
(RKE) System Operation (Key
Access) 013 or
Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0 16. If the RKE transmitter is 1 or
2, and Auto Memory Recall is
enabled in vehicle personalization,
the positions saved to the same
memory button number 1 or 2 are
automatically recalled when the
vehicle is turned on, or turned from
off to ACC/ACCESSORY. RKE
transmitters 3–8 will not provide
automatic memory recalls.
To turn Auto Memory Recall on or
off, see “Vehicle Personalization
Settings” previously in this section
and Vehicle Personalization 0152.
The shift lever must be in P (Park)
to start Auto Memory Recall. Auto
Memory Recall will complete if the
vehicle is shifted out of P (Park)
prior to reaching the saved memory
position. To stop Auto Memory Recall
movement, turn the vehicle off or
press any of the following controls:
.
Power seat
. Memory SET, 1, 2, or
B
.Power mirror, with the driver or
passenger side mirror selected
. Power steering wheel,
if equipped
If the saved memory seat position
does not automatically recall or
recalls to the wrong positions, the
driver ’s RKE transmitter number (1
or 2) may not match the memory
button number that positions were
saved to. Try storing the position to
the other memory button or try the
other RKE transmitter.
Easy Exit Recall
Easy Exit Recall is not linked to an
RKE transmitter. The position saved
to
Bis used for all drivers. To turn
Easy Exit Recall on or off, see
"Vehicle Personalization Settings"
previously in this section and
Vehicle Personalization 0152. If turned on, the position saved to
Bis automatically recalled when
one of the following occurs:
. The vehicle is turned off and the
driver door is opened within a
short time.
. The vehicle is turned off with the
driver door open.
To stop Easy Exit Recall movement,
press any of the following memory
controls:
. Power seat
. Memory SET, 1, 2, or
B
.Power mirror, with the driver or
passenger side mirror selected
. Power steering wheel,
if equipped
Obstructions
If something has blocked the driver
seat and/or power steering wheel
while recalling a memory position,
the recall may stop. Remove the
obstruction and try the recall again.
If the memory position still does not
recall, see your dealer.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Instruments and Controls 119
The wiper operations return to
normal when the transmission is no
longer in N (Neutral) or the vehicle
speed has increased.
Reverse Gear Wipes
If the rear wiper control is off, the
rear wiper will automatically operate
continuously when the shift lever is
in R (Reverse), and the front
windshield wiper is performing low
or high speed wipes. If the rear
wiper control is off, the shift lever is
in R (Reverse), and the front
windshield wiper is performing
interval wipes, then the rear wiper
automatically performs interval
wipes.
This feature can be turned on or off.
SeeVehicle Personalization 0152.
The windshield washer reservoir is
used for the windshield and the rear
window. Check the fluid level in the
reservoir if either washer is not
working. See Washer Fluid 0302.Compass
The vehicle may have a compass
display on the Driver Information
Center (DIC). The compass receives
its heading and other information
from the Global Positioning
System (GPS) antenna, StabiliTrak/
Electronic Stability Control (ESC),
and vehicle speed information.
The compass system is designed to
operate for a certain number of
miles or degrees of turn before
needing a signal from the GPS
satellites. When the compass
display shows CAL, drive the
vehicle for a short distance in an
open area where it can receive a
GPS signal. The compass system
will automatically determine when a
GPS signal is restored and provide
a heading again.
Clock
Setting the Time and Date with
Center Stack Controls
To set the time or date:
1. Select SETTINGS from the Home Page, then select Time
and Date.
2. Select the desired function.
3. Turn the MENU knob to increase or decrease the value.
4. Press the MENU knob to go to the next value. After the last
value is selected, the system
will update and return to the
Settings menu. Press
oBACK
to go to the last menu and
save the changes.
Auto Set requires an active OnStar
or connected service plan.
If auto timing is set, the time
displayed on the clock may not
update immediately when driving
into a new time zone.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
156 Instruments and Controls
Hands Free Liftgate Control
The liftgate may be operated with a
kicking motion under the rear
bumper. SeeLiftgate027.
Select Off, On-Open and Close,
or On-Open Only.
Reverse Tilt Mirror
When on, the driver and/or
passenger mirrors will tilt downward
when the vehicle is shifted to
R (Reverse) to improve visibility of
the ground near the rear wheels.
See Reverse Tilt Mirrors 040.
Select Off, On - Driver and
Passenger, On - Driver, or On -
Passenger.
Auto Mirror Folding
When on, the outside mirrors will
automatically fold or unfold when
the Remote Keyless Entry (RKE)
transmitter
QorKbutton is
pressed and held. See Folding
Mirrors 038.
Select Off or On. Auto Wipe in Reverse Gear
When on and the front wiper is on
and wiping, the rear wiper will
automatically activate when the
vehicle is shifted to R (Reverse).
Select Off or On.
Lighting
Select the Lighting menu and the
following may display:
.
Vehicle Locator Lights
. Exit Lighting
Vehicle Locator Lights
This feature will flash the exterior
lamps and allows some of the
exterior lamps and most of the
interior lamps to turn on briefly when
Kon the Remote Keyless Entry
(RKE) transmitter is pressed to
locate the vehicle.
Select On or Off.
Exit Lighting
This allows the selection of how
long the exterior lamps stay on
when leaving the vehicle when it is
dark outside. Select Off, 30 Seconds, 60 Seconds,
or 120 Seconds.
Power Door Locks
Select Power Door Locks and the
following may display:
.
Unlocked Door Anti-Lockout
. Auto Door Unlock
. Delayed Door Lock
Unlocked Door Anti-Lockout
When on, this feature will keep the
driver door from locking when the
door is open and the key is in the
ignition. If Off is selected, the
Delayed Door Lock menu will be
available.
Select Off or On.
Auto Door Unlock
This allows selection of which of the
doors will automatically unlock when
the vehicle is shifted into P (Park).
Select Off, All Doors, or Driver Door.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
Driving and Operating 183
Driving and
Operating
Driving Information
Driving for Better FuelEconomy . . . . . . . . . . . . . . . . . . . . 184
Distracted Driving . . . . . . . . . . . . 184
Defensive Driving . . . . . . . . . . . . . 185
Drunk Driving . . . . . . . . . . . . . . . . . 185
Control of a Vehicle . . . . . . . . . . . 186
Braking . . . . . . . . . . . . . . . . . . . . . . . 186
Steering . . . . . . . . . . . . . . . . . . . . . . 186
Off-Road Recovery . . . . . . . . . . . 187
Loss of Control . . . . . . . . . . . . . . . 187
Off-Road Driving . . . . . . . . . . . . . 188
Driving on Wet Roads . . . . . . . . 193
Hill and Mountain Roads . . . . . 193
Winter Driving . . . . . . . . . . . . . . . . 194
If the Vehicle Is Stuck . . . . . . . . 195
Vehicle Load Limits . . . . . . . . . . . 196
Starting and Operating
New Vehicle Break-In . . . . . . . . . 201
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . . . . . . . . . 201
Ignition Positions (Keyless Access) . . . . . . . . . . . . . . . . . . . . . 202 Ignition Positions (Key
Access) . . . . . . . . . . . . . . . . . . . . . 204
Starting the Engine . . . . . . . . . . . 206
Engine Heater . . . . . . . . . . . . . . . . 207
Retained Accessory Power (RAP) . . . . . . . . . . . . . . . . 209
Shifting Into Park . . . . . . . . . . . . . 209
Shifting out of Park . . . . . . . . . . . 210
Parking over Things That Burn . . . . . . . . . . . . . . . . . . . 211
Active Fuel Management . . . . . 211
Extended Parking . . . . . . . . . . . . . 211
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . 212
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . . 212
Automatic Transmission
Automatic Transmission . . . . . . 213
Manual Mode . . . . . . . . . . . . . . . . . 216
Tow/Haul Mode . . . . . . . . . . . . . . . 218
Drive Systems
Four-Wheel Drive . . . . . . . . . . . . . 219
Brakes
Antilock Brake
System (ABS) . . . . . . . . . . . . . . . 224
Parking Brake . . . . . . . . . . . . . . . . 225
Brake Assist . . . . . . . . . . . . . . . . . . 225
Hill Start Assist (HSA) . . . . . . . . 225
Ride Control Systems
Traction Control/Electronic Stability Control . . . . . . . . . . . . . 226
Hill Descent Control (HDC) . . . 228
Magnetic Ride Control . . . . . . . . 229
Locking Rear Axle . . . . . . . . . . . . 229
Automatic Level Control . . . . . . 229
Cruise Control
Cruise Control . . . . . . . . . . . . . . . . 230
Adaptive Cruise Control . . . . . . 232
Driver Assistance Systems
Driver Assistance Systems . . . 240
Assistance Systems for Parking or Backing . . . . . . . . . . 242
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . 245
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . 245
Automatic Emergency Braking (AEB) . . . . . . . . . . . . . . . 248
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . . . . 249
Lane Change Alert (LCA) . . . . . 250
Lane Keep Assist (LKA) . . . . . . 251
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . 254
Recommended Fuel (L83 5.3L V8 Engine) . . . . . . . . . . . . . . . . . . 254

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
188 Driving and Operating
Defensive drivers avoid most skids
by taking reasonable care suited to
existing conditions, and by not
overdriving those conditions. But
skids are always possible.
If the vehicle starts to slide, follow
these suggestions:
.Ease your foot off the
accelerator pedal and steer the
way you want the vehicle to go.
The vehicle may straighten out.
Be ready for a second skid if it
occurs.
. Slow down and adjust your
driving according to weather
conditions. Stopping distance
can be longer and vehicle
control can be affected when
traction is reduced by water,
snow, ice, gravel, or other
material on the road. Learn to
recognize warning clues —such
as enough water, ice, or packed
snow on the road to make a
mirrored surface —and slow
down when you have any doubt. .
Try to avoid sudden steering,
acceleration, or braking,
including reducing vehicle speed
by shifting to a lower gear. Any
sudden changes could cause
the tires to slide.
Remember: Antilock brakes help
avoid only the braking skid.
Off-Road Driving
Four-wheel-drive vehicles can be
used for off-road driving. Vehicles
without four-wheel drive and
vehicles not equipped with All
Terrain (AT) or On-Off Road (OOR)
tires must not be driven off-road
except on a level, solid surface. For
contact information about the
original equipment tires, see the
warranty manual.
One of the best ways for successful
off-road driving is to control the
speed.
{Warning
When driving off-road, bouncing
and quick changes in direction
can easily throw you out of
position. This could cause you to
lose control and crash. You and
your passengers should always
wear seat belts.
Before Driving Off-Road
. Have all necessary maintenance
and service work completed.
. Fuel the vehicle, fill fluid levels,
and check inflation pressure in
all tires, including the spare,
if equipped.
. Read all the information about
four-wheel-drive vehicles in this
manual.
. Remove any underbody air
deflector, if equipped. Re-attach
the air deflector after off-road
driving.
. Know the local laws that apply to
off-road driving.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
194 Driving and Operating
.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
(Continued)
Warning (Continued)
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 0226.
. The Antilock Brake System
(ABS) improves vehicle stability
during hard stops, but the
brakes should be applied sooner
than when on dry pavement.
See Antilock Brake System
(ABS) 0224.
. 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.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13566587) - 2020 - CRC - 4/15/19
202 Driving and Operating
Ignition Positions
(Keyless Access)
Vehicles equipped with Keyless
Access have pushbutton starting.
The Remote Keyless Entry (RKE)
transmitter must be in the vehicle for
the system to operate. If the
pushbutton start is not working, the
vehicle may be near a strong radio
antenna signal causing interference
to the Keyless Access system. See
Remote Keyless Entry (RKE)
System Operation (Key Access)
013 or Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0
16.
To shift out of P (Park), the ignition
must be on or in service mode, and
the brake pedal must be applied.
Stopping the Engine/LOCK/
OFF (No Indicator Lights) : When
the vehicle is stopped, press
ENGINE START/STOP once to turn
the engine off.
If the vehicle is in P (Park), the
ignition will turn off, and Retained
Accessory Power (RAP) will remain
active. See Retained Accessory
Power (RAP) 0209.
If the vehicle is not in P (Park), the
ignition will return to ACC/
ACCESSORY and display the
message SHIFT TO PARK in the
Driver Information Center (DIC).
When the vehicle is shifted into
P (Park), the ignition system will
turn off. Do not turn the engine off when the
vehicle is moving. This will cause a
loss of power assist in the brake
and steering systems and disable
the airbags.
The vehicle may have an electric
steering column lock. The lock is
activated when the ignition is turned
off and either front door is opened.
A sound may be heard as the lock
actuates or releases. The steering
column lock may not release with
the wheels turned off center. If this
happens, the vehicle may not start.
Move the steering wheel from left to
right while attempting to start the
vehicle. If this does not work, the
vehicle needs service.
If the vehicle must be shut off in an
emergency:
1. Brake using a firm and steady pressure. Do not pump the
brakes repeatedly. This may
deplete power assist, requiring
increased brake pedal force.
2. Shift the vehicle to N (Neutral). This can be done while the
vehicle is moving. After shifting