light GMC YUKON 1999 Owner's Manual

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For example,
these symbols
are used on an
original battery:
CAUTION
POSSIBLE
INJURY
PROTECT
EYES BY
SHIELDING
CAUSTIC
BATTERY
ACID COULD
CAUSE
BURNS
AVOID
SPARKS OR
FLAMES
SPARK OR
FLAME
COULD
EXPLODE
BATTERY
These symbols
are important
for you and
your passengers
whenever your
vehicle is
driven:
DOOR LOCK
UNLOCK
FASTEN
SEAT
BELTS
POWER
WINDOW
AIR BAG
These symbols
have to do with
your lamps:
MASTER
LIGHTING
SWITCH
TURN
SIGNALS
PARKING
LAMPS
HAZARD
WARNING
FLASHER
DAYTIME
RUNNING
LAMPS
FOG LAMPS
These symbols
are on some of
your controls:
WINDSHIELD
WIPER
WINDSHIELD
WASHER
WINDSHIELD
DEFROSTER
REAR
WINDOW
DEFOGGER
VENTILATING
FAN
These symbols
are used on
warning and
indicator lights:
ENGINE
COOLANT
TEMP
BATTERY
CHARGING
SYSTEM
BRAKE
COOLANT
ENGINE OIL
PRESSURE
ANTI-LOCK
BRAKES
Here are some
other symbols
you may see:
FUSE
LIGHTER
HORN
SPEAKER
FUEL
Vehicle Symbols
These are some of the symbols you may find on your vehicle.

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1-10
Your vehicle has a light that
comes on as a reminder to
buckle up. (See ªSafety Belt
Reminder Lightº in
the Index.)
In most states and Canadian provinces, the law says to
wear safety belts. Here's why: They work.
You never know if you'll be in a crash. If you do have a
crash, you don't know if it will be a bad one.
A few crashes are mild, and some crashes can be so
serious that even buckled up a person wouldn't survive.
But most crashes are in between. In many of them,
people who buckle up can survive and sometimes walk
away. Without belts they could have been badly hurt
or killed.
After more than 30 years of safety belts in vehicles, the
facts are clear. In most crashes buckling up does
matter ... a lot!Why Safety Belts Work
When you ride in or on anything, you go as fast as
it goes.
Take the simplest vehicle. Suppose it's just a seat
on wheels.

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There is an air bag readiness
light on the instrument
panel, which shows
AIR BAG.
The system checks the air bag electrical system for
malfunctions. The light tells you if there is an electrical
problem. See ªAir Bag Readiness Lightº in the Index
for more information.How the Air Bag System Works
Where are the air bags?
The driver's air bag is in the middle of the
steering wheel.

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Safety Belt Extender
If the vehicle's safety belt will fasten around you, you
should use it.
But if a safety belt isn't long enough to fasten, your
dealer will order you an extender. It's free. When you go
in to order it, take the heaviest coat you will wear, so the
extender will be long enough for you. The extender will
be just for you, and just for the seat in your vehicle that
you choose. Don't let someone else use it, and use it
only for the seat it is made to fit. To wear it, just attach it
to the regular safety belt.
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors and
anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from
doing its job, have it repaired.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt is
torn or frayed, get a new one right away.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air bag system
does not need regular maintenance.)
Replacing Restraint System Parts
After a Crash
If you've had a crash, do you need new belts?
After a very minor collision, nothing may be necessary.
But if the belts were stretched, as they would be if worn
during a more severe crash, then you need new belts.
If belts are cut or damaged, replace them. Collision
damage also may mean you will need to have safety belt
or seat parts repaired or replaced. New parts and repairs
may be necessary even if the belt wasn't being used at
the time of the collision.
If an air bag inflates, you'll need to replace air bag
system parts. See the part on the air bag system earlier in
this section.

2-
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2-1
Section 2 Features and Controls
Here you can learn about the many standard and optional features on your vehicle, and information on starting,
shifting and braking. Also explained are the instrument panel and the warning systems that tell you if everything is
working properly
-- and what to do if you have a problem.
2
-2 Keys
2
-3 Door Locks
2
-6 Keyless Entry System
2
-11 Rear Doors
2
-13 Theft
2
-13 Theft-Deterrent System
2
-16 Feature Customization
2
-20 Passlock

2-20 New Vehicle ªBreak-Inº
2
-21 Ignition Positions
2
-22 Starting Your Engine
2
-24 Engine Coolant Heater (If Equipped)
2
-25 Automatic Transmission Operation
2
-28 Four-Wheel Drive
2
-32 Parking Brake
2
-33 Shifting Into Park (P)
2
-35 Shifting Out of Park (P)
2
-36 Parking Over Things That Burn
2
-36 Engine Exhaust2
-37 Running Your Engine While You're Parked
2
-38 Locking Rear Axle
2
-38 Windows
2
-39 Horn
2
-39 Tilt Wheel
2
-40 Multifunction Lever
2
-46 Exterior Lamps
2
-49 Interior Lamps
2
-51 Mirrors
2
-55 Storage Compartments
2
-61 Ashtrays and Cigarette Lighter
2
-63 Sun Visors
2
-63 Universal Transmitter
2
-67 Cellular Telephone (If Equipped)
2
-67 OnStar
System (If Equipped)
2
-68 Instrument Panel
2
-70 Instrument Panel Cluster
2
-72 Warning Lights, Gages and Indicators

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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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2-14 Shock Sensor
A shock sensor triggers the alarm when it detects a blow
to your vehicle. It is located in the center floor console.
There are two levels of alarms via the shock sensor: two
horn blasts and the headlamp/parking lamps flash for
non
-threatening blows to the vehicle or a full
two
-minute alarm for harder blows to the vehicle. Its
sensitivity can be adjusted if more or less sensitivity is
desired. If sensitivity is increased too much, it may give
false alarms caused by gusts of wind or other natural
events that may shake the vehicle.
The adjustment for the
shock sensor sensitivity can
be accessed through a hole
in the forward wall of the
main bin of the center
floor console.
Using a small flat
-tipped screwdriver, turn the adjuster
clockwise to increase sensitivity and turn counterclockwiseto decrease sensitivity. The shock sensor is ignored by the
alarm system when the ignition is on, when the tailgate or
panel doors are open, when the alarm is disarmed, when
customized to be ignored and for five seconds after the
horn sounds an alarm or chirp. The shock sensor is
ignored after triggering three full alarms until the system
is rearmed.
Arming the System
The alarm system can be armed to detect break-ins by
locking your vehicle using the keyless entry or by
locking the doors with the power door lock switch.
Passive arming is also available if you would like the
system to arm all by itself after the doors have been
closed for a short time. See ªFeature Customizationº in
the Index. When the system is armed, a red light will
flash on the center floor console briefly once every two
seconds. If you return to your vehicle and the red light is
flashing two brief flashes every two seconds, the system
is armed and the shock sensor had triggered a two
minute alarm. If the red light is flashing three times
every two seconds, the system is armed and there was an
intrusion that sounded the alarm.
Horn chirps and parking lamp flashes can be set to
your choice.

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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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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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NEUTRAL: Shift the vehicle's transfer case to neutral
only when towing your vehicle. See ªRecreational
Vehicle Towingº or ªTowing Your Vehicleº in the Index
for more information.
Indicator lights in the switches show which setting you
are in. The indicator lights will come on briefly when
you turn on the ignition and one will stay on. If the
lights do not come on, you should take your vehicle to
your dealer for service. An indicator light will flash
while shifting the transfer case. It will remain
illuminated when the shift is complete. If for some
reason the transfer case cannot make a requested shift, it
will return to the last chosen setting.
If the SERVICE 4WD light stays on, you should take
your vehicle to your dealer for service. See ªService
4WDº in the Index for further information.
Shifting to 4HI or AUTO 4WD
Press and release the 4HI or AUTO 4WD switch. This
can be done at any speed, and the indicator light will
flash while shifting. It will remain illuminated when the
shift is completed.
Shifting to 2HI
Press and release the 2HI switch. This can be done at
any speed.Shifting to 4LO
To shift to 4LO, the vehicle's engine must be running and
the vehicle must be stopped or moving less than 3 mph
(4.8 km/h) with the transmission in NEUTRAL (N). The
preferred method for shifting into 4LO is to have your
vehicle moving 1 to 2 mph (1.6 to 3.2 km/h). Press and
release the 4LO switch. You must wait for the 4LO
indicator light to stop flashing and remain illuminated
before shifting your transmission into gear.
If the 4LO switch is pressed when your vehicle is in
gear and/or moving, the 4LO indicator light will flash
for 30 seconds and not complete the shift unless your
vehicle is moving less than 3 mph (4.8 km/h) and the
transmission is in NEUTRAL (N). After 30 seconds the
transfer case will return to the setting last chosen.
Shifting Out of 4LO
To shift from 4LO to 4HI, AUTO 4WD or 2HI your
vehicle must be stopped or moving less than 3 mph
(4.8 km/h) with the transmission in NEUTRAL (N) and
the engine running. The preferred method for shifting
out of 4LO is to have your vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Press and release the 4HI, AUTO
4WD or 2HI switch. You must wait for the 4HI, AUTO
4WD or 2HI indicator light to stop flashing and remain
illuminated before shifting your transmission into gear.