lock GMC YUKON 2012 Owner's Guide

Black plate (9,1)GMC Yukon/Yukon XL Owner Manual - 2012
Keys, Doors, and Windows 2-9
Open the rear doors to access the
security locks on the inside edge of
each door.
To set the locks, insert a key into
the slot and turn it to the horizontal
position. The door can only be
opened from the outside with the
door unlocked. To return the door to
normal operation, turn the slot to the
vertical position.
Doors
Liftgate (Manual)
{WARNING
It can be dangerous to drive with
the liftglass or liftgate open
because carbon monoxide (CO)
gas can come into your vehicle.
You cannot see or smell CO.
It can cause unconsciousness
and even death.
If you must drive with the liftglass
or liftgate open, or if electrical
wiring or other cable connections
must pass through the seal
between the body and the
liftglass or liftgate:
.Make sure all other windows
are shut.
.Turn the fan on your heating
or cooling system to its
highest speed with the(Continued)
WARNING (Continued)
recirculation mode off. That
will force outside air into your
vehicle. SeeClimate Control
Systems on page 8‑1 orDual
Automatic Climate Control
System on page 8‑4.
.If you have air outlets on or
under the instrument panel,
open them all the way.
.If your vehicle has a power
liftgate, disable the power
liftgate function.
See Engine Exhaust on
page 9‑30.
Press
Kon the Remote Keyless
Entry (RKE) transmitter or use the
power door lock switches to unlock
the liftgate. See Remote Keyless
Entry (RKE) System Operation on
page 2‑3.

Black plate (12,1)GMC Yukon/Yukon XL Owner Manual - 2012
2-12 Keys, Doors, and Windows
If the transmission is shifted out of
P (Park) while the power function is
in progress, the liftgate power
function will continue to completion.
If the transmission is shifted out of
P (Park) and the vehicle accelerates
before the power liftgate latches
closed, the liftgate may reverse to
the open position. Cargo could fall
out of the vehicle. Always make
sure the power liftgate is closed and
latched before you drive away.
If you power open the liftgate and
the liftgate support struts have lost
pressure, the lamps will flash and a
chime will sound. The liftgate will
stay open temporarily, then slowly
close. See your dealer for service
before using the liftgate.Obstacle Detection Features
If the liftgate encounters an obstacle
during a power open or close cycle,
a warning chime will sound and the
liftgate will automatically reverse
direction to the full closed or open
position. After removing the
obstruction, the power liftgate
operation can be used again.
If the liftgate encounters multiple
obstacles on the same power cycle,
the power function will deactivate,
and you must manually open or
close the liftgate. The REAR
ACCESS OPEN warning message
in the Driver Information Center
(DIC) will indicate that the liftgate
is open. After removing the
obstructions, manually open the
liftgate to the full open position or
close the liftgate to the fully closed
and latched position. The liftgate will
now resume normal power
operation.Pinch sensors are located on the
sides of the liftgate. If an object is
caught between the liftgate and the
body and presses against this
sensor, the liftgate will reverse
direction and open fully. The liftgate
will remain open until it is activated
again or closed manually. Do not
force the liftgate open or closed
during a power cycle.
Manual Operation of Power
Liftgate
To change the liftgate to manual
operation, press the switch on the
overhead console to the OFF
position.
With the power liftgate disabled and
all of the doors unlocked, the liftgate
can be manually opened and
closed.

Black plate (14,1)GMC Yukon/Yukon XL Owner Manual - 2012
2-14 Keys, Doors, and Windows
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not make
it impossible to steal.
Anti-theft Alarm System
Your vehicle has a content
theft-deterrent alarm system.
This is the security light.
To arm the theft-deterrent system:
1. Open the door.
2. Lock the door with the RemoteKeyless Entry (RKE) transmitter
or the power door lock switch. The security light will come on to
inform the driver the system is
arming. If a door is open when
the doors are locked, the
security light will flash.
If the delayed locking feature is
turned on, the theft‐deterrent
system will not start the arming
process until the last door is
closed and the delay timer has
expired. See
Delayed Locking
on page 2‑8.
3. Close all doors. The security light should go off after about
30 seconds. The alarm is not
armed until the security light
goes off.
If a locked driver door is opened
without using the RKE transmitter, a
10-second pre-alarm will occur. The
horn will chirp and the lights will
flash. If the key is not placed in the
ignition and turned to START or the
door is not unlocked by pressing
the unlock button on the RKE
transmitter during the 10-second
pre-alarm, the alarm will go off. Your vehicle's headlamps will flash
and the horn will sound for about
30 seconds, then will turn off to save
the battery power.
The theft-deterrent system will not
activate if the doors are locked with
the vehicle's key or the manual door
lock. It activates only if you use the
power door lock switch with the door
open or the RKE transmitter. You
should also remember that you can
start your vehicle with the correct
ignition key if the alarm has been
set off.
To avoid setting off the alarm by
accident:.If you do not want to activate the
theft-deterrent system, the
vehicle should be locked with
the door key after the doors are
closed.
.Always unlock the doors with the
RKE transmitter. Unlocking a
door any other way will set off
the alarm if it is armed.

Black plate (15,1)GMC Yukon/Yukon XL Owner Manual - 2012
Keys, Doors, and Windows 2-15
If you set off the alarm by accident,
press unlock on the RKE transmitter
or place the key in the ignition and
turn it to START to turn off the
alarm. The alarm will not stop if you
try to unlock a door any other way.
Testing the Alarm
To test the alarm:
1. From inside the vehicle, lowerthe driver window and open the
driver door.
2. Activate the system by locking the doors with the power door
lock switch while the door is
open, or with the RKE
transmitter.
3. Get out of the vehicle, close the door and wait for the security
light to go out.
4. Then reach in through the window, unlock the door with the
manual door lock and open the
door. This should set off the
alarm. While the alarm is set, the power
door unlock switch will not work.
If the alarm does not sound when it
should but the headlamps flash,
check to see if the horn works. The
horn fuse may be blown. To replace
the fuse, see
Fuses and Circuit
Breakers on page 10‑40.
If the alarm does not sound or the
headlamps do not flash, the vehicle
should be serviced by your dealer.
Immobilizer
See Radio Frequency Statement on
page 13‑16 for information
regarding Part 15 of the Federal
Communications Commission (FCC)
rules and Industry Canada
Standards RSS-GEN/210/220/310.
Immobilizer Operation
This vehicle has PASS-Key®III+
(Personalized Automotive Security
System) theft-deterrent system.
PASS-Key III+ is a passive
theft-deterrent system.
The system is automatically armed
when the key is removed from the
ignition.
The system is automatically
disarmed when the key is turned to
ON/RUN, ACC/ACCESSORY,
or START from the LOCK/OFF
position.
You do not have to manually arm or
disarm the system.
The security light will come on if
there is a problem with arming or
disarming the theft-deterrent
system.
When the PASS-Key III+ system
senses that someone is using the
wrong key, it prevents the vehicle
from starting. Anyone using a
trial-and-error method to start the

Black plate (16,1)GMC Yukon/Yukon XL Owner Manual - 2012
2-16 Keys, Doors, and Windows
vehicle will be discouraged because
of the high number of electrical key
codes.
If the engine does not start and the
security light on the instrument
panel cluster comes on when trying
to start the vehicle, there may be a
problem with the theft-deterrent
system. Turn the ignition off and try
again.
If the engine still does not start, and
the key appears to be undamaged,
try another ignition key. At this time,
you may also want to check the
fuse. SeeFuses and Circuit
Breakers on page 10‑40. If the
engine still does not start with the
other key, the vehicle needs service.
If the vehicle does start, the first key
may be faulty. See your dealer who
can service the PASS-Key III+ to
have a new key made.
It is possible for the PASS-Key III+
decoder to learn the transponder
value of a new or replacement key.
Up to 10 keys may be programmed
for the vehicle. The following procedure is for programming
additional keys only. If all the
currently programmed keys are lost
or do not operate, you must see
your dealer or a locksmith who can
service PASS-Key III+ to have keys
made and programmed to the
system.
See your dealer or a locksmith who
can service PASS-Key III+ to get a
new key blank cut exactly as the
ignition key that operates the
system.
To program the new additional key:
1. Verify that the new key has a
1
stamped on it.
2. Insert the original, already programmed key in the ignition
and start the engine. If the
engine will not start, see your
dealer for service.
3. After the engine has started, turn the key to LOCK/OFF, and
remove the key. 4. Insert the new key to be
programmed and turn it to the
ON/RUN position within
five seconds of turning the
ignition to the LOCK/OFF
position in Step 3.
The security light will turn off
once the key has been
programmed.
5. Repeat Steps 1 through 4 if additional keys are to be
programmed.
If you lose or damage your
PASS-Key III+ key, see your dealer
or a locksmith who can service
PASS-Key III+ to have a new
key made.
Do not leave the key or device that
disarms or deactivates the
theft-deterrent system in the vehicle.

Black plate (21,1)GMC Yukon/Yukon XL Owner Manual - 2012
Keys, Doors, and Windows 2-21
The vehicle aerodynamics are
designed to improve fuel economy
performance. This may result in a
pulsing sound when either rear
window is down and the front
windows are up. To reduce the
sound, open either a front window
or the sunroof (if equipped).
Power Windows
{WARNING
Leaving children in a vehicle with
the keys is dangerous for many
reasons. Children or others could
be badly injured or even killed.
They could operate the power
windows or other controls or even
make the vehicle move. The
windows will function and they
could be seriously injured or killed
if caught in the path of a closing
window. Do not leave keys in a
vehicle with children.
When there are children in the
rear seat use the window lockout
button to prevent unintentional
operation of the windows.
The power window switches are
located on each of the side doors.
The driver door also has switches
that control the front passenger and
rear windows. The power windows
work when the ignition is in ON/
RUN or ACC/ACCESSORY, or in
Retained Accessory Power (RAP).
SeeRetained Accessory Power
(RAP) on page 9‑27.
Press the switch to lower the
window. Pull up the front of the
switch to raise the window.

Black plate (22,1)GMC Yukon/Yukon XL Owner Manual - 2012
2-22 Keys, Doors, and Windows
Express Down Windows
Windows that have the express‐
down feature allow the windows to
be lowered without holding the
switch. Press the window switch
fully and release it to activate the
express‐down feature. The express
mode can be canceled at any time
by briefly pressing, or pulling the
switch.
Window Lockout
o(Window Lockout):The
window lockout switch is on the
driver door. This feature prevents
the rear passenger windows from
operating, except from the driver
position. Press the switch to turn the
lockout feature on or off. An
indicator light shows the feature
is on.
Sun Visors
Pull the sun visor down to block
glare. Detach the sun visor from the
center mount to pivot to the side
window, or to extend along the rod,
if available.
Roof
Sunroof
A. Open or Close Sunroof
B. Vent
On vehicles with a sunroof, there
are two sunroof switches on the
overhead console above the
rearview mirror.

Black plate (23,1)GMC Yukon/Yukon XL Owner Manual - 2012
Keys, Doors, and Windows 2-23
The sunroof only operates when the
ignition is in ON/RUN or ACC/
ACCESSORY, or in Retained
Accessory Power (RAP). See
Retained Accessory Power (RAP)
on page 9‑27for more information.
To open or close the sunroof, press
the open or close switch (A) to the
first detent position.
To express open or close the
sunroof, press the open or close
switch (A) to the second detent
position and release. To stop the
movement, press the switch again.
The sunroof has a comfort stop
feature which stops the sunroof from
opening to the full-open position.
From the comfort stop position,
press the open or close switch (A) a
second time to open the sunroof to
the full-open position. To automatically vent or close the
sunroof, press the vent open or
close switch (B).
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.
If an object is in the path of the
sunroof while it is closing, the
anti-pinch feature will detect the
object and stop the sunroof.
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.

Black plate (2,1)GMC Yukon/Yukon XL Owner Manual - 2012
3-2 Seats and Restraints
Head Restraints
{WARNING
With head restraints that are not
installed and adjusted properly,
there is a greater chance that
occupants will suffer a neck/
spinal injury in a crash. Do not
drive until the head restraints for
all occupants are installed and
adjusted properly.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.
Front Seats
The front seats have adjustable
head restraints in the outboard
seating positions.
The height of the head restraint can
be adjusted. Pull the head restraint
up to raise it. Try to move the head
restraint to make sure that it is
locked in place.
To lower the head restraint, press
the button, located on the top of the
seatback, and push the head
restraint down. Try to move the
head restraint after the button is
released to make sure that it is
locked in place.
The front seat outboard head
restraints are not designed to be
removed.

Black plate (3,1)GMC Yukon/Yukon XL Owner Manual - 2012
Seats and Restraints 3-3
Rear Seats
The vehicle's second-row seats
have head restraints in the outboard
seating positions that cannot be
adjusted.
The vehicle's third-row seats,
if equipped, have adjustable
headrests in the outboard seating
positions.
The height of the headrest can be
adjusted. Pull the headrest up to
raise it. To lower the headrest, push
down on the headrest.
Rear seat head restraints and
headrests are not designed to be
removed.
Front Seats
Seat Adjustment
{WARNING
You can lose control of the
vehicle if you try to adjust a
manual driver seat while the
vehicle is moving. The sudden
movement could startle and
confuse you, or make you push a
pedal when you do not want to.
Adjust the driver seat only when
the vehicle is not moving.
To adjust the seat:
1. Lift the bar under the front edgeof the seat cushion to unlock
the seat.
2. Slide the seat to the desired position and release the bar.
3. Try to move the seat back and forth to be sure the seat is
locked in place.