2018 GMC YUKON XL ignition

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
In Brief 71. Air Vents 0 185 .
2. Head-Up Display (HUD) 0 154
(If Equipped).
3.
g Traction Control/Electronic
Stability Control 0 229 .
j Power Assist Steps 0 48 (If
Equipped).
X Parking Assist Button (If
Equipped). See Assistance
Systems for Parking or Backing
0 243 .
A Lane Departure Warning
(LDW) 0 252 (If Equipped).
0 Pedal Adjust Switch (If
Equipped). See Adjustable
Throttle and Brake Pedal
0 205 .
4. Turn Signal Lever. See Turn
and Lane-Change Signals
0 174 .
Windshield Wiper/Washer
0 123 . 5. Favorite Switches (Out of
View). See “ Steering Wheel
Controls ” in the infotainment
manual.
Volume Switches (Out of View).
See “ Steering Wheel Controls ”
in the infotainment manual.
6. Hazard Warning Flashers
0 174 .
7. Instrument Cluster 0 133 .
8. Shift Lever. See Automatic
Transmission 0 216 .
Tow/Haul Selector Button. See
Tow/Haul Mode 0 222 .
Range Selection Mode (If
Equipped). See Manual Mode
0 218 .
9. Light Sensor. See Automatic
Headlamp System 0 173 .
10. Infotainment 0 179 .
11. Dual Automatic Climate Control
System 0 180 .
12. Heated and Ventilated Front
Seats 0 67 . 13. Rear Climate Control Buttons.
See Rear Climate Control
System 0 184 .
14. Ignition Positions (Key Access)
0 207 or Ignition Positions
(Keyless Access) 0 205 .
15. Steering Wheel Controls. See
the infotainment manual.
16. Horn 0 123 .
17. Steering Wheel Adjustment
0 123 .
18. Hood Release. See Hood
0 279 .
19. Cruise Control 0 233 .
Adaptive Cruise Control 0 235
(If Equipped).
Forward Collision Alert (FCA)
System 0 246 (If Equipped).
Heated Steering Wheel 0 123 .
20. Trailer Brake Control Panel (If
Equipped). See Towing
Equipment 0 267 .
21. Data Link Connector (DLC)
(Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0 143 .

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
In Brief 11To disable the power liftgate
function, select OFF on the liftgate
switch. See Liftgate 0 43 .
Windows
Power windows work when the
ignition is on, in ACC/ACCESSORY,
or when Retained Accessory Power
(RAP) is active. See Retained
Accessory Power (RAP) 0 212 .
Using the window switch, press to
open or pull to close the window.
The windows may be temporarily
disabled if they are used repeatedly
within a short time. Seat Adjustment Power Seats
To adjust the seat:
.
Move the seat forward or
rearward by sliding the control
forward or rearward.
.
Raise or lower the front part of
the seat cushion by moving the
front of the control up or down.
.
Raise or lower the seat by
moving the rear of the control up
or down.
See Power Seat Adjustment 0 62 .Reclining Seatbacks
To recline the seatback:
.
Tilt the top of the control
rearward to recline.
.
Tilt the top of the control forward
to raise.
See Reclining Seatbacks 0 63 .

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
12 In Brief Lumbar Adjustment
To adjust the lumbar support:
.
Press and hold the control
forward to increase or rearward
to decrease upper and lower
lumbar support at the same time.
.
Press and hold the control up to
increase upper lumbar support
and decrease lower lumbar
support.
Press and hold the control down
to increase lower lumbar support
and decrease upper lumbar
support.
See Lumbar Adjustment 0 63 .Memory Features
If equipped, memory seats allow two
drivers to store and recall their
unique seat positions for driving the
vehicle, and a shared exit position
for getting out of the vehicle. Other
feature positions may also be set,
such as power mirrors, power
steering wheel, and adjustable
pedals, if equipped. Memory
positions are linked to RKE
transmitter 1 or 2 for automatic
memory recalls.
Before storing, adjust all available
memory feature positions. Turn the
ignition on and then press and release SET; a beep will sound.
Then immediately press and hold 1,
2, or
B (Exit) on the driver door
until two beeps sound. To manually
recall these positions, press and
hold 1, 2, or
B until the saved
position is reached.
When Auto Memory Recall is
enabled in vehicle personalization,
positions previously stored to
memory buttons 1 and 2 are
recalled when the ignition is
changed from off to on or ACC/
ACCESSORY.
When Easy Exit Options is enabled
in vehicle personalization, the
feature automatically recalls the
previously stored exit position when
exiting the vehicle. See Memory
Seats 0 64 .
Second Row Seats The second row seatbacks can be
folded for additional cargo space,
or the seats can be folded and
tumbled for easy entry/exit to the
third row seats. The seatbacks also
recline.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
16 In Brief The vehicle may have a memory
function, which lets pedal settings
be saved and recalled. See Memory
Seats 0 64 .
Interior Lighting Dome Lamps
There are dome lamps in the
overhead console and the headliner,
if equipped.
To change the dome lamp settings,
press the following:
OFF : Turns the lamps off, even
when a door is open. DOOR : The lamps come on
automatically when a door is
opened.
ON : Turns all dome lamps on.
Reading Lamps
There are reading lamps in the
overhead console and the headliner,
if equipped. To operate, the ignition
be on or in ACC/ACCESSORY or
using Retained Accessory
Power (RAP). Press
m or
n next to each reading
lamp to turn it on or off.
For more information on interior
lighting, see Instrument Panel
Illumination Control 0 176 .
Exterior Lighting

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
In Brief 23
Universal Remote System
If equipped with the Universal
Remote system, these buttons will
be in the front overhead console.
This system provides a way to
replace up to three remote control
transmitters used to activate
devices such as garage door
openers, security systems, and
home automation devices.
See Universal Remote System
0 166 . Sunroof
1. SLIDE Switch
2. TILT Switch
If equipped, the sunroof only
operates when the ignition is on or
in ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is
active. See Retained Accessory
Power (RAP) 0 212 .
Slide Switch
Express-Open/Express-Close : To
express-open the sunroof, fully
press and release
I (1). To
express-close the sunroof, fully press and release
K (1). Press
the switch again to stop the
movement.
Open/Close (Manual Mode) : To
open the sunroof, press and hold
I(1). Release the switch at the
desired position. Press and hold
K (1) to close the sunroof.
Release the switch at the desired
position.
Tilt Switch
Vent : From the closed position,
press
J (2) to vent the sunroof.
Press
K (2) to close the
sunroof vent.
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
The sunroof also has a sunshade
which can be pulled forward to block
sun rays. The sunshade must be
opened and closed manually.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
Keys, Doors, and Windows 27
Keys, Doors, and
Windows Keys and Locks Keys (Keyless Access) . . . . . . . . 27
Keys (Key Access) . . . . . . . . . . . . 28
Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . . 31
Remote Keyless Entry (RKE)
System Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 31
Remote Keyless Entry (RKE)
System Operation (Keyless
Access) . . . . . . . . . . . . . . . . . . . . . . 33
Remote Vehicle Start . . . . . . . . . . 39
Door Locks . . . . . . . . . . . . . . . . . . . . 41
Power Door Locks . . . . . . . . . . . . . 42
Delayed Locking . . . . . . . . . . . . . . . 42
Automatic Door Locks . . . . . . . . . 42
Lockout Protection . . . . . . . . . . . . . 42
Safety Locks . . . . . . . . . . . . . . . . . . . 43
Doors Liftgate . . . . . . . . . . . . . . . . . . . . . . . . 43
Power Assist Steps . . . . . . . . . . . . 48
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 49
Vehicle Alarm System . . . . . . . . . 49 Immobilizer . . . . . . . . . . . . . . . . . . . . 51
Immobilizer Operation . . . . . . . . . 51
Exterior Mirrors Convex Mirrors . . . . . . . . . . . . . . . . 52
Power Mirrors . . . . . . . . . . . . . . . . . . 53
Folding Mirrors . . . . . . . . . . . . . . . . . 53
Heated Mirrors . . . . . . . . . . . . . . . . . 54
Automatic Dimming Mirror . . . . . 54
Blind Spot Mirrors . . . . . . . . . . . . . . 54
Reverse Tilt Mirrors . . . . . . . . . . . . 55
Interior Mirrors Interior Rearview Mirrors . . . . . . . 55
Manual Rearview Mirror . . . . . . . . 55
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 56
Child-View Mirror . . . . . . . . . . . . . . 56
Windows Windows . . . . . . . . . . . . . . . . . . . . . . . 56
Power Windows . . . . . . . . . . . . . . . 56
Sun Visors . . . . . . . . . . . . . . . . . . . . . 58
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 58 Keys and Locks Keys (Keyless Access)
{ WarningLeaving children in a vehicle with
an ignition key or Remote
Keyless Entry (RKE) transmitter is
dangerous and children or others
could be seriously injured or
killed. They could operate the
power window or other controls or
make the vehicle move. The
windows will function with the key
in the ignition or with the RKE
transmitter in the vehicle, and
children or others could be caught
in the path of a closing window.
Do not leave children in a vehicle
with the ignition key or an RKE
transmitter.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
28 Keys, Doors, and Windows
If the vehicle has the Keyless
Access system, there is a key in the
transmitter.
This key is used for the driver door
and glove box. If the vehicle has the Keyless
Access system, the transmitter has
a button on the side of the
transmitter used to remove the key.
Do not pull the key out without
pressing the button.
See your dealer if a replacement
key or additional key is needed.
If it becomes difficult to turn a key,
inspect the key blade for debris.
Periodically clean with a brush
or pick.
With an active OnStar service plan,
an OnStar Advisor may remotely
unlock the vehicle. See OnStar
Overview 0 400 . If locked out of the vehicle, see
Roadside Assistance Program
0 390 .
If equipped with memory seats, RKE
transmitters 1 and 2 are linked to
seating positions of memory 1 or 2.
See Memory Seats 0 64 .
Keys (Key Access)
{ WarningLeaving children in a vehicle with
an ignition key or Remote
Keyless Entry (RKE) transmitter is
dangerous and children or others
could be seriously injured or
killed. They could operate the
power window or other controls or
make the vehicle move. The
windows will function with the key
in the ignition or with the RKE
transmitter in the vehicle, and
children or others could be caught
in the path of a closing window.
Do not leave children in a vehicle
with the ignition key or an RKE
transmitter.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
Keys, Doors, and Windows 29
{ WarningIf the key is unintentionally
rotated while the vehicle is
running, the ignition could be
moved out of the RUN position.
This could be caused by heavy
items hanging from the key ring,
or by large or long items attached
to the key ring that could be
contacted by the driver or
steering wheel. If the ignition
moves out of the RUN position,
the engine will shut off, braking
and steering power assist may be
(Continued) Warning (Continued) impacted, and airbags may not
deploy. To reduce the risk of
unintentional rotation of the
ignition key, do not change the
way the ignition key and Remote
Keyless Entry (RKE) transmitter,
if equipped, are connected to the
provided key rings.
The ignition key and key rings, and
RKE transmitter, if equipped, are
designed to work together as a
system to reduce the risk of
unintentionally moving the key out
of the RUN position. The ignition
key has a small hole to allow
attachment of the provided key ring.
It is important that any replacement
ignition keys have a small hole. See
your dealer if a replacement key is
required.
The combination and size of the
rings that came with your keys were
specifically selected for your
vehicle. The rings are connected to
the key like two links of a chain to
reduce the risk of unintentionally moving the key out of the RUN
position. Do not add any additional
items to the ring attached to the
ignition key. Attach additional items
only to the second ring, and limit
added items to a few essential keys
or small, light items no larger than
an RKE transmitter.