1999 GMC YUKON window

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To wash the window, push in on the switch. Window
washer fluid will continue to spray until the switch is
released. The wiper will continue with three more wipes
and then return to the setting that was chosen before the
lever was pushed.
The rear window washer uses the same fluid bottle as
the front windshield washer. If the fluid level is low in
the washer fluid bottle, you may not be able to wash
your rear window. If you can wash your windshield, but
not your rear window, check the fluid level.
Cruise Control
With cruise control, you can
maintain a speed of about
25 mph (40 km/h) or more
without keeping your foot
on the accelerator.This can really help on long trips. Cruise control does
not work at speeds below 25 mph (40 km/h).
When you apply your brakes, cruise control shuts off.
CAUTION:

Cruise control can be dangerous where you
can't drive safely at a steady speed. So,
don't use your cruise control on winding
roads or in heavy traffic.

Cruise control can be dangerous on
slippery roads. On such roads, fast changes
in tire traction can cause needless wheel
spinning, and you could lose control. Don't
use cruise control on slippery roads.

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Cleaning the Mirror
When cleaning the mirror, use a paper towel or similar
material dampened with glass cleaner. Do not spray
glass cleaner directly on the mirror as that may cause the
liquid cleaner to enter the mirror housing.
Compass Calibration
If, after five seconds, the display does not show a
compass heading (ªNº for North, for example), there
may be a strong magnetic field interfering with the
compass. Such interference may be caused by a
magnetic antenna mount, magnetic note pad holder
or a similar magnetic item. If the letter ªCº should ever
appear in the compass window, the mirror may
need calibration.
The mirror can be calibrated in one of two ways:

Drive the vehicle in two circles at 5 mph (8 km/h) or
less until the display reads a direction, or
Drive the vehicle on your everyday routine and after
several turns the compass will become calibrated and
will display a direction.
Compass Variance
The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to compensate
for compass variance if you live outside zone eight.
Under certain circumstances, as during a long distance
cross
-country trip, it will be necessary to adjust for
compass variance. Compass variance is the difference
between earth's magnetic north and true geographic
north. If not adjusted to account for compass variance,
your compass could give false readings.
To adjust for compass variance:
1. Press and hold the COMP switch, located at the
bottom of the mirror, for three seconds until a zone
number appears in the display.

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To turn on the auto-dimming feature, press and hold the
inside rearview mirror TEMP button for eight seconds.
See ªElectrochromic Inside Rearview Mirror with
Compass, Temperature Display and Headlamp Delayº in
the Index for further information.
To turn on the defrost feature, press the rear window
defrost button. See ªRear Window Defoggerº in the
Index for further information.
Convex Outside Mirror
Your passenger's side mirror is convex. A convex
mirror's surface is curved so you can see more from the
driver's seat.
CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder before
changing lanes.
Storage Compartments
Your vehicle has a variety of storage compartments
designed to store small items.
Glove Box
To open your glove box, move the release button toward
the passenger's side and pull the door open.
Center Overhead Console
Your vehicle has an overhead console. It has storage
compartments inside it. Your vehicle also has a
Universal Transmitter. See ªUniversal Transmitterº in
the Index.
Sunglasses Compartment
The center overhead compartment can be used to
conveniently store your sunglasses.
To open the center compartment, press the release
button located at the rear of the compartment door.
Place your sunglasses in the compartment door with the
lenses facing out.

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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.
Your visors have a strap to hold small items, such
as maps.
The visors have an extender on the inside edge. When
the visor is down, pull the extender out for extra glare
coverage at the front or side.
The visors also have mirrors with lights. The lights will
come on when you lift the mirror cover.
Universal Transmitter
This transmitter allows you to consolidate the functions
of up to three individual hand
-held transmitters. It will
operate garage doors and gates, or with the accessory
package, other devices controlled by radio frequency
such as home/office lighting and security systems.

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A. Dome Lamp Switch
B. Lamp Controls
C. Air Outlets
D. Multifunction Lever
E. Instrument Panel Cluster
F. Gearshift Lever
G. Rear Window Wiper Washer Switch
H. Audio System
I. Comfort Control System
J. Glove Box
K. AshtrayL. Cupholder
M. Auxiliary Power Outlets
N. Storage Area or Compact Disc Player (If Equipped)
O. Rear Window Defogger Switch
P. Fog Lamp Switch
Q. Automatic Transfer Case Switch
R. Tilt Lever
S. Parking Brake Release
T. Hood Release
U. Fuse Block

3-
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Section 3 Comfort Controls and Audio Systems
In this section, you'll find out how to operate the comfort control and audio systems offered with your vehicle. Be
sure to read about the particular systems supplied with your vehicle.
3
-2 Comfort Controls
3
-3 Rear Air Conditioning
3
-4 Air Conditioning
3
-5 Heating
3
-5 Ventilation System
3
-6 Defogging and Defrosting
3
-7 Rear Window Defogger
3
-7 Audio Systems
3
-7 Setting the Clock
3
-8AM-FM Stereo with Cassette Tape Player3
-12 CD Adapter Kit
3
-12 Rear Seat Audio (RSA)
3
-14 Remote Compact Disc Player (If Equipped)
3
-16 Console-Mounted CD Changer
3
-19 Theft-Deterrent Feature
3
-21 Understanding Radio Reception
3
-21 Tips About Your Audio System
3
-22 Care of Your Cassette Tape Player
3
-24 Care of Your Compact Discs
3
-24 Fixed Mast Antenna

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To use the rear control, first turn the front control knob
to REAR CNTL. Then, the rear control can be used to
increase and decrease the airflow.
Air Conditioning
On hot days, open the windows long enough to let hot
air inside escape. This reduces the time it takes for your
vehicle to cool down. Then keep your windows closed
for the air conditioner to work its best.
The recirculation button, between the fan and
temperature knobs, allows the air inside your vehicle to
be recirculated. This setting helps to maximize your air
conditioner's performance and your vehicle's fuel
economy. This setting also cools the air the fastest and
can be used to keep unwanted odors and/or dust from
entering the vehicle. When using the air conditioner,
turn off recirculation after the vehicle reaches a
comfortable interior temperature. When the right knob
on the control panel is between HEATER and
DEFROST, the recirculation feature will not function.
The A/C button, between the temperature and mode
knobs, allows the air coming into your vehicle to be
cooled. This setting is useful for normal cooling on hot
days. When you use A/C with the recirculation button
pushed in, turn off recirculation as soon as the vehicle
reaches a comfortable interior temperature.

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With the A/C on, turn the temperature knob to MAX for
maximum cooling. This setting also puts the system in
the recirculation mode and helps to maximize your air
conditioner's performance and your vehicle's fuel
economy. This setting also cools the air the fastest. After
the vehicle's interior reaches a comfortable temperature,
turn the temperature knob clockwise to place the air
conditioning system in the normal mode.
Heating
The heater works best if you keep your windows closed
while using it. On cold days, use the HEATER or
VENT/HEAT setting with the temperature knob in
the red area.
If you use the engine coolant heater before starting your
engine in cold weather, 20
F (
-8
C) or lower, your
heating system will produce warmer air faster, to heat
the passenger compartment in cold weather.
The use of an engine coolant heater also reduces the
time it takes for the engine to reach normal operating
temperature, and shortens the time it takes the heater to
reach full output. For more information, see ªEngine
Coolant Heaterº in the Index.
Ventilation System
For mild outside temperatures when little heating or
cooling is needed, use VENT to direct outside air
through your vehicle. Air will flow through the
instrument panel outlets.
Your vehicle's ventilation system supplies outside air to
the inside of your vehicle when it is moving. With the side
windows closed, air will flow into the front air inlet grilles,
through the vehicle, and out the air exhaust valves.
Outside air will also enter the vehicle when the heater or
the air conditioning fan is running, unless you have the
recirculation button pushed in. For more information on
the recirculation button, see ªAir Conditioningº earlier
in this section.