lock GMC YUKON XL DENALI 2001 Service Manual

2-30
Locking Rear Axle
Your locking rear axle can give you additional traction
on snow, mud, ice, sand or gravel. It works like a
standard axle most of the time, but when one of the rear
wheels has no traction and the other does, this feature
will allow the wheel with traction to move the vehicle.
All-Wheel Drive
With this feature, engine power is sent to all four wheels
when extra traction is needed.
This is like four
-wheel drive, but there is no separate
lever or switch to engage or disengage the front axle.
It is fully automatic, and adjusts itself as needed for
road conditions.
Horn
To sound the horn, press the center pad on the
steering wheel.
Tilt Wheel
The tilt steering wheel
allows you to adjust the
steering wheel before
you drive.
You can also raise it to the highest level to give your
legs more room when you enter and exit the vehicle.
To tilt the wheel, hold the steering wheel and pull the
lever located on the lower left of the column. Move the
steering wheel to a comfortable level, then release the
lever to lock the wheel in place.

2-33 Windshield Washer
There is a paddle marked with the windshield washer
symbol at the top of the multifunction lever. To spray
washer fluid on the windshield, push the paddle. The
wipers will clear the window and then either stop or
return to your preset speed.
CAUTION:
In freezing weather, don't use your washer until
the windshield is warmed. Otherwise the washer
fluid can form ice on the windshield, blocking
your vision.
Rear Window Washer/Wiper
This knob is located on the
instrument panel.
To turn the rear wiper on, turn the knob to either ª1º
or ª2º. For long delayed wiping, turn the knob to 1.
For short delayed wiping, turn the knob to 2. To turn the
wiper off, turn the knob to 0.
To wash the window, press the knob.
The rear window washer uses the same fluid bottle as
the windshield washer. However, the rear window
washer will run out of fluid before the windshield
washer. If you can wash your windshield but not your
rear windows, check the fluid level.
For more information, see ªLow Washer Fluidº in
the Index.

2-37
Exterior Lamps
Your parking lamp and headlamp knob is on the driver's
side of your instrument panel.
Turn the knob clockwise to the parking lamps symbol to
manually turn on:

Parking Lamps

Sidemarker Lamps

Taillamps

License Plate Lamps

Instrument Panel LightsTurn the knob clockwise to the master lamps symbol to
turn on all the lamps listed as well as the headlamps.
Turn the knob all the way counterclockwise to turn
off your lamps and put the system into automatic
headlamp mode.
You can switch your headlamps from high to low beam
by pulling on the turn signal/high
-beam lever.
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. The radio lights will also dim.
Your vehicle is equipped with a headlamp off delay,
which will keep the headlamps on for a short time after
the ignition is turned to OFF. For more information see
ªSecondary Information Center (SIC)º in the Index.
Your vehicle has a light sensor located on the top of
the instrument panel in the defroster grille. Be sure it
is not covered, or the system will be on whenever the
ignition is on.
The system may also turn on your headlamps when
driving through a parking garage, heavy overcast
weather or a tunnel. This is normal.

2-38
There is a delay in the transition between the daytime
and nighttime operation of the Daytime Running Lamps
(DRL) and the automatic headlamp systems so that
driving under bridges or bright overhead street lights
does not affect the system. The DRL and automatic
headlamp system will only be affected when the light
sensor sees a change in lighting lasting longer than
the delay.
To idle your vehicle with the automatic headlamp
system off, set the parking brake while the ignition is
off. Then start your vehicle. The automatic headlamp
system 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.
You may be able to turn off your automatic headlamp
system. See ªDaytime Running Lamps (DRL)º later in
this section for more information.
Lamps On Reminder
A reminder chime will sound when your headlamps or
parking lamps are manually turned on and your ignition
is in OFF, LOCK or ACCESSORY. To disable the
chime, turn the thumbwheel all the way down. In the
automatic mode, the headlamps turn off once the
ignition key is in OFF.
Puddle Lamps
Your vehicle is equipped with puddle lamps to help you
see the area near the base of the front doors when it is
dark out. The puddle lamps will illuminate when a door
is opened or when you press the UNLOCK button on the
keyless entry transmitter. The lamps will time out or
turn off once the engine is started.
You can program the puddle lamps not to come on if
you choose. See ªSecondary Information Centerº in the
Index for more information.
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. Fully
functional daytime running lamps are required on all
vehicles first sold in Canada.
The DRL system will come on when:

the ignition is on,

the headlamp knob is in automatic headlamp mode,

the automatic transmission is not in PARK (P),

the light sensor determines it is daytime and

the parking brake is released.

2-47 Center Console Storage Area
Your vehicle has a console compartment between the
bucket seats.
To open it, insert the console key into the lock and
unlock the console. Press the button on the side and
swing the console lid open.
The console has a place to store compact discs and loose
change. The console is also equipped with an accessory
power outlet. See ªAccessory Power Outletsº later in
this section for more information.
To access the cell phone storage area, press the button
on the front of the console and an access lid will pop up.
To store a cell phone, place it inside the net on the inside
of the access lid.

2-49 Cargo Security Shade
CAUTION:
An improperly stored cargo cover could be
thrown about the vehicle during a collision or
sudden maneuver. You or others could be
injured. If you remove the cover, always store it
outside of the vehicle. When you put it back,
always be sure that it is securely reattached.
If you have a cargo security shade, you can use it to
cover items in the cargo area of your vehicle.
To use the shade, do the following:
1. Pull the shade handle toward the rear of the vehicle.
2. Latch the shade posts into the retaining sockets on
the cargo area trim panels.
To return the shade to the retracted position, do the following:
1. Pull up on the shade handle to release the shade posts
from the retaining sockets.
2. Let the shade move forward to the full
retracted position.To remove the shade from the vehicle, do the following:
1. Let the shade go all the way into the holder.
2. Then, grasping the passenger's side shade endcap,
push the shade endcap toward the driver's side of
the vehicle. The endcap should lock in the
compressed position.
3. Lift the shade up on the passenger's side, swing the
shade rearward and take it out of the vehicle.
To put the shade in the vehicle, do the following:
1. Make sure the shade slot in the holder faces rearward
with the round surface facing down.
2. Then, hold the shade at an angle and place the shade
holder tab into the slot in the driver's side trim panel.
3. Move the other end of the shade forward and hold it
next to the passenger's side trim panel slot.
4. Push the button on top of the passenger's side
endcap. This will allow the shade to extend into the
trim slot.
5. Lightly pull on the shade holder to make sure it is
secure. On Denali XL models there are two slots.
The slots furthest forward allow the shade to be used
if the third seat is removed or folded down.

2-51
To prevent damage or loss of cargo as you're leaving,
check now and then to make sure the luggage and cargo
are still securely fastened.
Be sure the cargo is properly loaded.

If small heavy objects are placed on the roof, place
the load in the area over the rear wheels (behind the
rear side door on Denali XL models). If you need to,
cut a piece of 3/8 inch plywood to fit inside the
crossrails and siderails to spread the load. If plywood
is used, tie it to the siderail supports.

Tie the load to the crossrails or the siderail supports.
Use the crossrails only to keep the load from sliding.
To move the crossrails, pull out on the latch release
handle at each end. Slide the crossrail to the desired
position balancing the force side to side. Push the
release handle back into the latched position and
slide the crossrail back and forth slightly to be sure
the latch snaps securely into place.
If you need to carry long items, move the crossrails
as far apart as they will go. Tie the load to the
crossrails and the siderails or siderail supports. Also
tie the load to the bumpers. Do not tie the load so
tightly that the crossrails or siderails are damaged.

For the purpose of wind noise reduction, locate the
front crossrail approximately 18 to 24 inches
(46 cm to 58 cm) rearward of the front supports.

After moving a crossrail, be sure it is securely locked
into the siderail.
Your vehicle has a Center High
-Mounted Stoplamp
(CHMSL) located above the rear glass.
If items are loaded on the roof of the vehicle,
care should be taken not to block or damage the
CHMSL unit.

2-55 Safety and Security Services

Automatic Notification of Air Bag
Deployment
-- If an air bag deploys, a priority
emergency signal is sent automatically to the center.
An advisor will locate your vehicle's position, try to
contact you and assist you in the situation. If the
center is unable to contact you, an emergency service
provider will be contacted.

Stolen Vehicle Tracking
-- Call the center at
1
-888-4-ONSTAR (1-888-466-7827) to report your
vehicle stolen. The system can then locate and track
your vehicle and the advisor will be able to notify
the proper authorities.

Roadside Assistance with Location
-- For vehicle
breakdowns, press the OnStar button. An advisor
will contact the appropriate help.

Remote Diagnostics
-- If an instrument panel light
comes on, the center can perform a check of the
engine on
-board computer. An advisor can then
recommend what action needs to be taken.
OnStar MED
-NET -- Med-Net can store your
personal medical history and provide it to emergency
personnel if necessary. (Requires activation and an
additional fee.)

Accident Assist
-- An advisor can provide
step
-by-step guidance following an accident.

Remote Door Unlock
-- To contact the center, call
1
-888-4-ONSTAR. You will be required to provide
your security information. An advisor will send a
command to your vehicle to unlock itself. The
advisor can delay unlocking your vehicle. Remote
Door Unlock is disabled 48 hours after the vehicle
is parked to maintain the battery charge.

Vehicle Locator Service
-- To contact the center,
call 1
-888-4-ONSTAR. You will be required to
provide your security information. An advisor will
send a command to your vehicle to sound the horn
and/or flash the lamps.
In order to provide you with excellent service, calls with
the OnStar Center may be monitored or recorded.

2-57
Sunroof (If Equipped)
Your vehicle may be equipped with a power sliding
sunroof. To open or close your sunroof, the ignition
needs to be on or RAP needs to be active. See ªRetained
Accessory Powerº in the Index.
Press and release the rear side of the button located in
the front overhead console to express
-open the glass
panel and sunshade. To close the glass panel, press and
hold the front of the button. The glass will not be fully
seated unless the button is held until the glass stops
moving. With the sunroof closed, press the forward side
of the button to open the sunroof to the vent position.The sunroof is also equipped with a sunshade which you
can pull forward to block sun rays.
If a hand, arm, or other object is blocking the sunroof
glass panel as it is closing, the glass panel will stop at
the obstruction. After the obstruction is removed, the
glass panel can be closed or opened.
Use care not to leave the sunroof open for long periods
of time as debris may collect in the tracks.
If the battery has been recharged, disconnected or is not
working, you may need to reprogram the sunroof. To do
this, start the vehicle and press the forward side of the
sunroof switch until the glass panel moves to a fully
closed position. Release, and press again to move to the
vent position which occurs when the sunroof is fully
tilted rearward. This will reset the memory and enable
the sunroof to function properly.

2-63
The main components of your instrument panel are the following:
A. Dome Lamp Override Switch
B. Lamp Controls
C. Air Outlets
D. Storage Compartment
E. Multifunction Lever
F. Instrument Panel Cluster
G. Shift Lever
H. Tow/Haul Switch
I. Audio System
J. Comfort Control System
K. Instrument Panel Fuse BlockL. Hood Release
M. Audio Steering Wheel Controls
N. Center Instrument Panel Utility Block
O. Tilt Lever
P. Parking Brake Release
Q. Secondary Information Center (SIC)
R. Rear Window Defogger Switch
S. Compact Disc Changer
T. Ashtray
U. Accessory Power Outlet
V. Glovebox