1999 GMC YUKON lock

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Remote Keyless Entry Transmitter Locking
If all the doors are closed, locking the vehicle with the
transmitter will immediately arm the system. The horn
will chirp twice and the headlamps and parking lamps
will flash, confirming that the system is armed if that
mode is selected. If any door is open when the
transmitter LOCK button is pressed, the system goes
into an armed wait mode, waiting for the doors to close.
Once they are closed, the system will arm and the
headlamps and parking lamps will flash. If the tailgate
or panel doors are open or ajar at the time the system is
arming, the headlamps and parking lamps flash once.
Power Door Lock Switch Locking
If any door is open when the power door lock switch is
pressed, the system goes into an armed wait mode,
waiting for the doors to close. Once they are closed, the
system will arm and the parking lamps will flash. If both
of the doors are closed when the power lock switch is
pressed, the system assumes you are inside the vehicle,
so it will not arm. Locking the doors by using the
manual door locks will not arm the system.Passive Arming
If the LOCK button on the keyless entry transmitter or
the power door lock switch is pressed, the system will
arm immediately. If the ignition was just turned off and
a door was opened, the system will arm six seconds after
the doors, tailgate or panel doors are closed, whether or
not you lock them with the manual door lock. If a door
is opened without the ignition being turned on, the
system will wait 30 seconds after the doors, tailgate or
panel doors are closed before arming, allowing you time
to get into the vehicle and put the key in the ignition.
The parking lamps will flash when the system arms.
Passive arming is not enabled from the factory.
Disarming the System
There are two ways to disarm the system:
1. Press the UNLOCK button on the keyless entry
transmitter. If the horn chirps two or three times
when you unlock the vehicle, the alarm sounded in
your absence. Two chirps means that the shock
sensor was set off and three chirps means that a door,
tailgate or the panel doors were opened.
2. Turn the ignition to RUN with the proper key.
For more information on customizing the features
mentioned here, see ªFeature Customizationº in the Index.

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2-16 Turning Off the Alarm
If you started the alarm by pressing the panic button on the
keyless entry transmitter, you must either push that button
again or turn the ignition to RUN to stop the alarm.
If the alarm is sounding due to the shock sensor or a
door, tailgate or panel door opening, it can be turned off
by either turning the ignition switch with a proper key
inserted or by pressing any button on the keyless entry
transmitter. If you use your keyless entry transmitter to
silence the alarm, additional things will happen
depending upon which button you press.

Pressing the UNLOCK button will turn the alarm
off, unlock the driver's door and disarm the system.

Pressing the LOCK button will turn the alarm off,
keep the doors locked and keep the system armed.

Pressing the REAR 2X button will turn the alarm off
and disarm the system.

Pressing the panic button will turn the alarm off,
keep the doors locked and keep the system armed.
If the alarm is sounding because an incorrect ignition
key was used, press any button on the keyless entry
transmitter to turn the alarm off.
The alarm will stop by itself after two minutes.
Feature Customization
Your vehicle's locks and lighting systems can be
programmed with several different features. The following
list tells you the features that can be programmed.

Lockout Prevention

Keyless Entry Verification

Theft
-Deterrent Arming Method

Theft
-Deterrent Arming Verification

Driver's Door Alarm Delay
To program features, your vehicle must be in the
programming mode. Follow these steps:
1. Put your key in the ignition.
2. Turn the ignition to RUN to disarm the
theft
-deterrent system.
3. Turn the ignition to OFF.
4. Remove the RADIO fuse (Fuse 17). This fuse is in
the main fuse block, located on the left side of your
instrument panel. When the main fuse block is open,
the RADIO fuse (Fuse 17) is located in the lower
right corner side of the fuse panel. See ªFuses and
Circuit Breakersº in the Index.

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5. Turn the ignition to ACCESSORY.
You should hear two chimes to verify that the system
is in programming mode. You will also be able to set
Keyless Entry Verification, Arming Method, Arming
Verification, Driver's Door Delay, Shock Sensor
Enable and Lockout Prevention.
Lockout Prevention
Your vehicle comes with this feature set in Mode 2. This
means that your power door locks will not lock when
the keys are in the ignition and a door is open. To
change the factory setting, do the following:
1. Press the LOCK switch on the door.
2. Count the number of chimes you hear. The number
of chimes tells you which mode your vehicle is
set for.
3. Press the LOCK switch on the door until you hear
the number of chimes that correspond to the mode
selection you want.
Mode 1: Both Off (Doors will lock/unlock when you
press the power door lock switch).
Mode 2: Lockout Prevention Enabled
Keyless Entry Verification
Your vehicle comes with this feature set in Mode 5. This
means that when you use the keyless entry transmitter to
lock/unlock your vehicle, your headlamps and parking
lamps will flash briefly upon the first press on LOCK.
Your horn will sound briefly and your headlamps and
parking lamps will flash briefly upon the second press
on LOCK. Your headlamps and parking lamps will flash
briefly upon any press on UNLOCK. To change the
factory setting, do the following:
1. Press the UNLOCK button on the keyless
entry transmitter.
2. Count the number of chimes you hear. The number
of chimes tells you which mode your vehicle is
set for.
3. Press the UNLOCK button on the keyless entry
transmitter until you hear the number of chimes that
correspond to the mode selection you want.
Mode 1: All Off (The headlamps will not flash and the
horn will not sound to provide you feedback that a
lock/unlock command has been received by the keyless
entry transmitter.)

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Mode 2: Horn and Lamps/Lamps (Your horn will sound
briefly and your headlamps and parking lamps will flash
when you press LOCK on the keyless entry transmitter.
Only your headlamps and parking lamps will flash when
you press UNLOCK.)
Mode 3: Horn and Lamps (Your horn will sound briefly
and your headlamps and parking lamps will flash every
time you push LOCK or UNLOCK.)
Mode 4: Lamps (Your headlamps and parking lamps
will flash every time you press LOCK or UNLOCK.)
Mode 5: Lamps/Horn and Lamps/Lamps (Your
headlamps and parking lamps will flash upon the first
press on LOCK, your headlamps and parking lamps will
flash and your horn will sound upon the second press on
LOCK and your headlamps and parking lamps will flash
upon any press on UNLOCK.)
Theft-Deterrent Arming Method
Your vehicle comes with this feature set in Mode 3. This
means that both your keyless entry transmitter and the
power door lock switch will actively arm the system. To
change the factory setting, do the following:
1. Press the UNLOCK switch on the door.2. Count the number of chimes you hear. The number
of chimes tells you which mode your vehicle is
set for.
3. Press the UNLOCK switch on the door until you
hear the number of chimes that correspond to the
mode selection you want.
Mode 1: Alarm System Off (The system will not arm.)
Mode 2: Keyless Entry Transmitter Lock (When you
lock your doors using the keyless entry transmitter, the
system will arm.)
Mode 3: Keyless Entry Transmitter/Power Door Lock
Switch (If you use either the keyless entry transmitter or
the power door lock switch to lock the doors, the system
will arm.)
Mode 4: Passive arming and Keyless Entry
Transmitter/Power Door Lock Switch Arming (The
system will arm itself after all doors are closed, plus
arming per mode 3.)

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2-19 Theft-Deterrent Arming Verification
Your vehicle comes with the theft-deterrent arming
verification set in Mode 3. This means that if you arm
the system using the keyless entry transmitter, your
headlamps and parking lamps will flash and your horn
will chirp twice to verify that the system is armed. If it
only chirps once, the tailgate or the panel doors are open
or unlatched. In addition, if the system did not arm, the
horn will chirp once and the theft
-deterrent indicator on
the center floor console will not flash. If you arm the
system using either the power door lock switch or by
passive arming, only the headlamps and parking lamps
will flash for verification. To change the factory setting,
do the following:
1. Press the LOCK switch on the keyless
entry transmitter.
2. Count the number of chimes you hear. The number
of chimes tells you which mode your vehicle is
set for.
3. Press the LOCK switch on the keyless entry
transmitter until you hear the number of chimes that
corresponds to the mode selection you want.
Mode 1: All Off (No horn chirps or headlamps and
parking lamps will flash.)Mode 2: Horn and Lamps (Your headlamps and parking
lamps will flash and your horn will chirp twice to verify
the system is armed using any arming method.)
Headlamps and parking lamps only will flash
when disarming.
Mode 3: Horn and Lamps/Lamps (If you use the keyless
entry transmitter to arm the system, your headlamps and
parking lamps will flash and your horn will chirp twice
to verify that the system is armed. If you use either the
power door lock switch or passive arming, only your
headlamps and parking lamps will flash for
verification.) The headlamps and parking lamps will
flash only when disarming.
Mode 4: Lamps (When your vehicle arms, only your
headlamps and parking lamps will flash for
verification.) The headlamps and parking lamps will
flash only when disarming.
Driver's Door Alarm Delay
If you open the driver's door using your key, the alarm
will not sound for eight seconds.
Leaving Programming Mode
When programming is done, turn the ignition to OFF
and replace the RADIO fuse (Fuse 17).

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Passlock
Your vehicle is equipped with the Passlock
theft
-deterrent system.
Passlock is a passive theft
-deterrent system. Passlock
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, fuel is disabled.
During normal operation, the SECURITY light will go
off approximately five seconds after the key is turned to
the RUN ignition position.
If the engine stalls and the SECURITY light flashes,
wait until the light stops flashing before trying to restart
the engine. Remember to release the key from START
as soon as the engine starts.
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 system is not working
properly and must be serviced by your dealer. Your vehicle
is not protected by Passlock at this time. You may also
want to check the fuse (see ªFuses and Circuit Breakersº
in the Index). See your dealer for service.
In an emergency, call the GMC Roadside Assistance
Center at 1
-800-GMC-8782 (1-800-462-8782) in the
United States, or 1
-800-268-6800 in Canada.
New Vehicle ªBreak-Inº
NOTICE:
Your vehicle doesn't 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 first 500 miles (805 km).

Don't drive at any one speed
-- fast or
slow
-- for the first 500 miles (805 km).
Don't make full
-throttle starts.

Avoid making hard stops for the first
200 miles (322 km) or so. During this time
your new brake linings aren't 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.

Don't tow a trailer during break
-in. See
ªTowing a Trailerº in the Index for
more information.

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Ignition Positions
CAUTION:
Leaving children in a vehicle with the ignition
key is dangerous for many reasons. A child or
others could be injured or even killed. They could
operate power windows or other controls or even
make the vehicle move. Don't leave the keys in
the vehicle with children.
Use your key to start your vehicle. The key lets you turn
the ignition switch to five different positions.ACCESSORY (A): This position lets you use things
like the radio and the windshield wipers when the
engine is off. Push in the key and turn it toward you.
Your steering wheel will remain locked, just as it was
before you inserted the key.

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LOCK (B): This position locks your ignition, steering
wheel and transmission. It's a theft
-deterrent feature.
You will only be able to remove your key when the
ignition is turned to LOCK.
OFF (C): This position lets you turn off the engine but
still turn the steering wheel. It doesn't lock the steering
wheel like LOCK. Use OFF if you must have your
vehicle in motion while the engine is off (for example, if
your vehicle is being pushed).
RUN (D): This is the position for driving.
START (E): This position starts your engine.
NOTICE:
If your key seems stuck in LOCK and you can't
turn it, be sure you are using the correct key; if
so, is it all the way in? If it is, then turn the
steering wheel left and right while you turn the
key hard. But turn the key only with your hand.
Using a tool to force it could break the key or the
ignition switch. If none of this works, then your
vehicle needs service.
Retained Accessory Power
Your vehicle is equipped with a Retained Accessory
Power (RAP) feature which will allow certain features
of your vehicle to continue to work up to 20 minutes
after the ignition key is turned to OFF.
Your radio, power windows and console accessories
will work when the ignition key is turned to RUN or
ACCESSORY. Once the key is turned from RUN to
OFF, these features will continue to work for up to
20 minutes or until a door is opened.
Starting Your Engine
Move your shift lever to PARK (P) or NEUTRAL (N).
Your engine won't start in any other position
-- that's a
safety feature. To restart when you're already moving,
use NEUTRAL (N) only.
NOTICE:
Don't try to shift to PARK (P) if your vehicle is
moving. If you do, you could damage the
transmission. Shift to PARK (P) only when your
vehicle is stopped.