ESP GMC YUKON 1999 Owner's Manual

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or the safety belts!
With safety belts, you slow down as the vehicle does.
You get more time to stop. You stop over more distance,
and your strongest bones take the forces. That's why
safety belts make such good sense.
Here Are Questions Many People Ask
About Safety Belts
-- and the Answers
Q:
Won't I be trapped in the vehicle after an
accident if I'm wearing a safety belt?
A:You could be -- whether you're wearing a safety
belt or not. But you can unbuckle a safety belt,
even if you're upside down. And your chance of
being conscious during and after an accident, so
you can unbuckle and get out, is much greater if
you are belted.
Q:If my vehicle has air bags, why should I have to
wear safety belts?
A:Air bags are in many vehicles today and will be in
most of them in the future. But they are
supplemental systems only; so they work with
safety belts
-- not instead of them. Every air bag
system ever offered for sale has required the use of
safety belts. Even if you're in a vehicle that has air
bags, you still have to buckle up to get the most
protection. That's true not only in frontal collisions,
but especially in side and other collisions.

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When should an air bag inflate?
An air bag is designed to inflate in a moderate to severe
frontal or near
-frontal crash. The air bag will inflate
only if the impact speed is above the system's designed
ªthreshold level.º If your vehicle goes straight into a
wall that doesn't move or deform, the threshold level is
about 9 to 16 mph (14 to 26 km/h). The threshold level
can vary, however, with specific vehicle design, so that
it can be somewhat above or below this range. If your
vehicle strikes something that will move or deform, such
as a parked car, the threshold level will be higher. The
air bag is not designed to inflate in rollovers, side
impacts or rear impacts, because inflation would not
help the occupant.
In any particular crash, no one can say whether an air
bag should have inflated simply because of the damage
to a vehicle or because of what the repair costs were.
Inflation is determined by the angle of the impact and
how quickly the vehicle slows down in frontal or
near
-frontal impacts.
The air bag system is designed to work properly under a
wide range of conditions, including off
-road usage.
Observe safe driving speeds, especially on rough terrain.
As always, wear your safety belt. See ªOff
-Road
Drivingº in the Index for more tips on off
-road driving.What makes an air bag inflate?
In an impact of sufficient severity, the air bag sensing
system detects that the vehicle is in a crash. The sensing
system triggers a release of gas from the inflator, which
inflates the air bag. The inflator, air bag and related
hardware are all part of the air bag modules inside the
steering wheel and in the instrument panel in front of the
right front passenger.
How does an air bag restrain?
In moderate to severe frontal or near
-frontal collisions,
even belted occupants can contact the steering wheel or
the instrument panel. Air bags supplement the protection
provided by safety belts. Air bags distribute the force of
the impact more evenly over the occupant's upper body,
stopping the occupant more gradually. But air bags
would not help you in many types of collisions,
including rollovers, rear impacts and side impacts,
primarily because an occupant's motion is not toward
those air bags. Air bags should never be regarded as
anything more than a supplement to safety belts,
and then only in moderate to severe frontal or
near
-frontal collisions.

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Your vehicle has one
double
-sided key for the
ignition and all door locks.
If you ever lose your key, your dealer will be able to
assist you with obtaining a new one.
Your vehicle also has a key
that locks and unlocks the
center floor console only.
Door Locks
CAUTION:
Unlocked doors can be dangerous.
Passengers -- especially children -- can easily
open the doors and fall out. When a door is
locked, the inside handle won't open it.
Outsiders can easily enter through an unlocked
door when you slow down or stop your vehicle.
This may not be so obvious: You increase the
chance of being thrown out of the vehicle in a
crash if the doors aren't locked. Wear safety belts
properly, lock your doors, and you will be far
better off whenever you drive your vehicle.
Side Doors
To open the door from the outside, pull the handle up
and pull the door open.
To open the door from the inside, pull the lever toward
you and push the door open.

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3. Turn the ignition from OFF to RUN three times
quickly (within five seconds). The vehicle will
respond by locking the doors, unlocking the driver's
doors and releasing the tailgate or panel doors. Your
transmitter is now ready to match the vehicle.
4. Press and hold the LOCK and UNLOCK buttons on
the first transmitter for 15 seconds. The vehicle will
respond as in Step 3.
5. Repeat Step 4 for the remaining transmitters.
6. When you have finished matching all of your
transmitters, replace the RADIO fuse (Fuse 17).
7. Check that all transmitters work by pressing
their buttons.
If the transmitters don't work, or if you'd rather not
match the transmitters yourself, see your dealer.Battery Replacement
Under normal use, the battery in your remote keyless
entry transmitter should last about two years.
You can tell the battery is weak if the transmitter won't
work at the normal range in any location. If you have to
get close to your vehicle before the transmitter works,
it's probably time to change the battery.
NOTICE:
When replacing the battery, use care not to touch
any of the circuitry. Static from your body
transferred to these surfaces may damage the
transmitter.
Use one three volt, type CR2032, or equivalent battery.

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To replace the battery:
1. Insert a small coin, or flathead screwdriver, to
separate the bottom of the transmitter from the top.
2. Remove the battery and replace it with a new one,
making sure the positive (+) side of the battery is
facing down.3. Snap the top and bottom together.
4. Test the operation of the transmitter with your
vehicle. If the transmitter does not work, try
synchronizing the transmitter with the receiver.
Resynchronization
Resynchronization may be necessary due to the security
method used by this system. The transmitter does not
send the same signal twice to the receiver. The receiver
will not respond to a signal it has been sent previously.
This prevents anyone from recording and playing back
the signal from the transmitter.
To resynchronize your transmitter, stand close to your
vehicle and simultaneously press and hold the LOCK
and UNLOCK buttons on the transmitter for at least
eight seconds. The door locks should cycle and the
parking lamps and headlamps should flash to confirm
synchronization. If this does not happen, you may need
to replace the battery in your transmitter or match the
transmitter to your vehicle. If the locks still do not cycle,
see your dealer for service.

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Theft
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. However, there are ways you
can help.
Key in the Ignition
If you leave your vehicle with the keys inside, it's an
easy target for joy riders or professional thieves
-- so
don't do it.
When you park your vehicle and open the driver's door,
you'll hear a chime reminding you to remove your key
from the ignition and take it with you. Always do this.
Your steering wheel will be locked, and so will your
ignition and transmission. Also remember to lock
the doors.
Parking at Night
Park in a lighted spot, close all windows and lock your
vehicle. Remember to keep your valuables out of sight.
Put them in a storage area, or take them with you.
Parking Lots
If you park in a lot where someone will be watching
your vehicle, it's best to lock it up and take your keys.
But what if you have to leave your ignition key? What if
you have to leave something valuable in your vehicle?

Put your valuables in a storage area, like your
glove box.

Lock all the doors except the driver's.
Theft-Deterrent System
Your vehicle has a theft-deterrent alarm system. Once
armed, the system will sound the horn and flash the
parking lamps if the vehicle is tampered with.
Opening the doors may activate the alarm. See
ªDisarming the Systemº later in this section for further
information on turning the system off.

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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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2-47 Automatic Headlamp System
When it is dark enough outside, your automatic
headlamp system will turn on your headlamps at the
normal brightness along with other lamps such as the
taillamps, sidemarker, parking lamps and the instrument
panel lights.
To idle your vehicle with the automatic headlamp
system off, set the parking brake while the ignition is
off. Then start the vehicle. The automatic headlamp
system will stay off until you release the parking brake.
The headlamp switch can always be used to turn on the
regular lamps. As with any vehicle, you should turn on
the regular headlamp system when you need it.
Headlamps-On Reminder
A chime will sound when your headlamps are turned on
and your ignition is in OFF, LOCK or ACCESSORY.
Daytime Running Lamps
Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the day.
DRL can be helpful in many different driving
conditions, but they can be especially helpful in the
short periods after dawn and before sunset.The DRL system will make your headlamps come on at
a reduced brightness when:

the ignition is on,

the headlamp switch is off,

the parking brake is released and

it is bright enough outside and the automatic
headlamps are off.
When the DRL are on, only your headlamps will be on.
The taillamps, sidemarker and other lamps won't be on.
Your instrument panel won't be lit up either.
When it begins to get dark, your DRL will turn off. Your
headlamps will come on automatically.
When it begins to get bright, the regular lamps will go
off, and your headlamps will change to the reduced
brightness of DRL.
To idle your vehicle with the DRL off, set the parking
brake. The DRL will stay off until you release the
parking brake.
As with any vehicle, you should turn on the regular
headlamp system when you need it.