2004 GMC YUKON XL DENALI ignition

Power Door Locks
The power door lock
switches are located on
the driver's and front
passenger's armrests.
Q(Lock):Remove the ignition key and press the lock
symbol to lock all of the doors.
If the delayed locking feature is on, the doors will not
lock until ®ve seconds after the last door is closed. Press
the lock symbol twice to override this feature and lock
all of the doors immediately. See
Delayed Locking
on page 2-9for more information.
K(Unlock):To unlock the doors, press the unlock
symbol.
Delayed Locking
When locking the doors with the power lock switch or
the keyless entry transmitter and a door or the liftgate (if
equipped) is open, the delayed locking feature will
delay locking the doors until ®ve seconds after the last
door is closed. You will hear three chimes to signal
that the delayed locking feature is in use.
Pressing the power lock switch or the lock button on the
keyless entry transmitter twice will override the
delayed locking feature and immediately lock all
the doors.
You can turn the delayed locking feature off or back on
again by doing the following:
1. Press and hold the power door lock switch in the
lock position.
2. Press unlock twice on the remote keyless entry
transmitter.
This feature will not operate if the key is in the ignition.
You can also program this feature using the DIC.
See ªDelayed Lockingº under
DIC Operation and
Displays on page 3-46.
2-9

Programmable Automatic Door
Locks
Your vehicle is equipped with an automatic lock/unlock
feature which enables you to program your vehicle's
power door locks. You can program this feature through
the Driver Information Center (DIC), or by the following
method.
Programmable Locking Feature
The following is the list of available programming
options:
Mode 1:All doors lock when the transmission is shifted
out of Park. This is the mode that is pre-programmed
in the factory for your vehicle.
Mode 2:All doors lock when the vehicle speed is
greater than 8 mph (13 km/h).
Mode 3:No automatic door locking.
The following instructions tell you how to change the
automatic door lock mode. Choose one of the three
programming options listed above before entering the
program mode. To enter the program mode, do the
following:
1. Begin with the ignition off. Then pull the turn
signal/multifunction lever toward you and hold
it there while you perform the next step.2. Turn the key to RUN then back to LOCK twice.
Then, with the key in LOCK, release the turn
signal/multifunction lever. Once you do this, the
doors will lock and unlock, the horn will chirp twice,
and a 30-second timer will begin. You are now
ready to program the automatic door lock feature.
3. Press the lock side of the power lock switch once.
You will hear one, two, or three chimes. The number
of chimes tells you which lock mode is currently
selected. Continue to press the door lock switch until
the number of chimes that you hear matches the
number of the mode that you want. If you take longer
than 30 seconds, the locks will automatically lock and
unlock and the horn will chirp twice to indicate that
you have left the program mode. If this occurs, you
can repeat the procedure beginning with Step 1 to
re-enter the programming mode.
You can exit the program mode any time by turning the
ignition to RUN (the doors will automatically lock and
unlock and the horn will chirp twice to indicate that you
are leaving the program mode). If the lock/unlock
switches are not pressed while in the programming
mode, the current automatic settings will not be
modi®ed.
See your dealer for more information.
2-10

Programmable Unlocking Feature
The following is the list of available programming
options:
Mode 1:Driver's door unlocks when the transmission is
shifted into PARK (P).
Mode 2:All doors unlock when the transmission is
shifted into PARK (P). This is the mode that is
pre-programmed in the factory for your vehicle.
Mode 3:All doors unlock when the key is removed
from the ignition.
Mode 4:No automatic door unlock.
The following instructions tell you how to change the
automatic door unlock mode. Choose one of the
four programming options listed above before entering
the program mode. To enter the program mode, do
the following:
1. Begin with the ignition off. Then pull the turn
signal/multifunction lever toward you and hold
it there while you perform the next step.
2. Turn the key to RUN and LOCK twice. Then, with
the key in LOCK, release the turn
signal/multifunction lever. Once you do this, the
doors will lock and unlock, the horn will chirp twice,
and a 30-second timer will begin. You are now
ready to program the automatic door unlock feature.3. Press the unlock side of the power lock switch
once. You will hear one, two, three, or four
chimes. The number of chimes tells you which
unlock mode is currently selected. Continue to press
the door unlock switch until the number of chimes
that you hear matches the number of the mode that
you want. If you take longer than 30 seconds, the
locks will automatically lock and unlock and the horn
will chirp twice to indicate that you have left the
program mode. If this occurs, you can repeat
the procedure beginning with Step 1 to re-enter the
programming mode.
You can exit the program mode any time by turning the
ignition to RUN (the doors will automatically lock and
unlock and the horn will chirp twice to indicate that you
are leaving the program mode). If the lock/unlock
switches are not pressed while in the programming
mode, the current automatic settings will not be
modi®ed.
See your dealer for more information.
2-11

Lockout Protection
This feature protects you from locking your key in the
vehicle when the key is in the ignition and a door
is open.
If the power lock switch is pressed when a door is open
and the key is in the ignition, all of the doors will lock
and then the driver's door will unlock.
Liftgate/Liftglass
{CAUTION:
It can be dangerous to drive with the liftgate or
liftglass open because carbon monoxide (CO)
gas can come into your vehicle. You can not
see or smell CO. It can cause
unconsciousness and even death. If you must
drive with the liftgate open or if electrical
wiring or other cable connections must pass
through the seal between the body and the
liftgate or liftglass:
·Make sure all other windows are shut.
CAUTION: (Continued)
CAUTION: (Continued)
·
Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. See Climate Control
System in the Index.
·If you have air outlets on or under the
instrument panel, open them all the way.
See
Engine Exhaust on page 2-30.
To unlock the liftgate and liftgate glass from the outside
use either the power door locks or the remote keyless
entry system.
The liftgate glass can be opened using the pushbutton
on the liftgate after the doors have been unlocked.
To open the entire liftgate, lift the handle located in the
center of the door.
To lock the liftgate and liftgate glass from the outside
use the remote keyless entry system or the power door
locks to lock the liftgate and liftgate glass.
2-13

Power Windows
If you have power windows, the controls are located on
each of the side doors.
The driver's door has a switch for the passenger's
windows as well. Your power windows will work when
the ignition has been turned to ACCESSORY or RUN or
when Retained Accessory Power (RAP) is active. See
Ignition Positions on page 2-19.
·Pull up the front edge of the switch to raise the
window.
·Press the front edge of the switch to lower the
window.
Express-Down Windows
The driver and front passenger windows have an
express down feature that allows the windows to be
lowered without holding the switch. Press down on the
front edge of the window switch to activate the
express down mode. The express down mode can be
canceled at any time by pulling up on the switch.
To open the window partway, lightly tap the switch until
the window is at the desired position.
Lock-Out Switch
If you have power windows, the driver's door power
window switch has a lock-out feature. The lock-out
switch is located in front of the power window switches.
This feature prevents all passenger windows from
operating, except from the driver's position, when the
lock-out switch is engaged. To engage the lock-out
feature press the switch, and an indicator light will
illuminate. To disengage the feature, press the switch
again and the indicator light will go off. When the button
is not engaged, the passenger's power windows
switches will operate.
2-15

Sun Visors
To block out glare, you can swing down the visors.
You can also swing them out to help block glare at the
front and side windows.
Illuminated Visor Vanity Mirrors
Pull the sunvisor down and lift the mirror cover to turn
on the lamps.
Theft-Deterrent Systems
Vehicle theft is big business, especially in some cities.
Although your vehicle has a number of theft-deterrent
features, we know that nothing we put on it can make it
impossible to steal.
Content Theft-Deterrent
Your vehicle is equipped with a content theft-deterrent
alarm system.
With this system, the
security light in the
instrument panel cluster will
¯ash as you open the door
if your ignition is off.
This light reminds you to activate the theft-deterrent
system. Here's how to do it:
1. Open the door.
2. Lock the door with the power door lock switch or
the remote keyless entry transmitter. The security
light should come on and stay on.
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 door is opened without the key or the remote
keyless entry transmitter, the alarm will go off. The
headlamps and parking lamps will ¯ash for two minutes,
and the horn will sound for 30 seconds, then will turn
2-16

off to save the battery power. You can choose different
feedback options for the alarm. SeeDriver Information
Center (DIC) on page 3-46.
Remember, the theft-deterrent system won't activate if
you lock the doors with a key or use the manual
door lock. It activates only if you use a power door lock
switch with the door open, or with the remote keyless
entry transmitter. You should also remember that
you can start your vehicle with the correct ignition key if
the alarm has been set off.
Here's how to avoid setting off the alarm by accident:
·If you don't want to activate the theft-deterrent
system, the vehicle should be locked with the door
key
afterthe doors are closed.
·Always unlock a door with a key, or use the remote
keyless entry transmitter. Unlocking a door any
other way will set off the alarm.
If you set off the alarm by accident, unlock any door with
the key. You can also turn off the alarm by pressing
unlock on the remote keyless entry transmitter. The alarm
won't stop if you try to unlock a door any other way.
Testing the Alarm
The alarm can be tested by following these steps:
1. From inside the vehicle, lower the driver's window
and open the driver's door.
2. Activate the system by locking the doors with the
power door lock switch while the door is open, or
with the remote keyless entry 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 is
not operational.
If the alarm does not sound when it should but the
headlamps ¯ash, check to see if the horn works. The
horn fuse may be blown. To replace the fuse, see
Fuses
and Circuit Breakers on page 5-103.
If the alarm does not sound or the headlamps do not
¯ash, the vehicle should be serviced by your dealer.
2-17

Passlockž
Your vehicle is equipped with the Passlockž
theft-deterrent system.
Passlockžis a passive theft-deterrent system. Passlockž
enables fuel if the ignition lock cylinder is turned with
a valid key. If a correct key is not used or the ignition
lock cylinder is tampered with, the fuel system is
disabled and the vehicle will not start.
During normal operation, the security light will turn off
approximately ®ve seconds after the key is turned
to RUN.
If the engine stalls and the security light ¯ashes, wait
about 10 minutes until the light stops ¯ashing before
trying to restart the engine. Remember to release
the key from START as soon as the engine starts.
If the engine does not start after three tries, the vehicle
needs service.
If the engine is running and the security light comes on,
you will be able to restart the engine if you turn the
engine off. However, your Passlock
žsystem is
not working properly and must be serviced by your
dealer. Your vehicle is not protected by Passlock
žat this
time. You may also want to check the fuse. See
Fuses and Circuit Breakers on page 5-103. See your
dealer for service.
In an emergency, call the Roadside Assistance Center.
See
Roadside Assistance Program on page 7-5.
Starting and Operating Your
Vehicle
New Vehicle Break-In
Notice:Your vehicle does not need an elaborate
ªbreak-in.º But it will perform better in the long run
if you follow these guidelines:
·Keep your speed at 55 mph (88 km/h) or less for
the ®rst 500 miles (805 km).
·Do not drive at any one speed Ð fast or
slow Ð for the ®rst 500 miles (805 km). Do not
make full-throttle starts.
·Avoid making hard stops for the ®rst 200 miles
(322 km) or so. During this time your new
brake linings are not yet broken in. Hard stops
with new linings can mean premature wear
and earlier replacement. Follow this breaking-in
guideline every time you get new brake
linings.
·Do not tow a trailer during break-in. SeeTowing
a Trailer on page 4-51
for more information.
2-18