2003 GMC YUKON Owner's Manual

Rear Window Defogger
If your vehicle has this feature, the lines you see on the
rear window warm the glass. The rear window
defogger uses a warming grid to remove fog from the
rear window.
<(Rear):Press this button to turn the rear window
defogger on or off. An indicator light in the button
will come on to let you know that the rear window
defogger is activated.
The rear window defogger will turn off about 10 minutes
after the button is pressed. If you need additional
warming time, press the button again.
If your vehicle is equipped with heated mirrors this
button will activate them.
Notice:Don’t use a razor blade or something else
sharp on the inside of the rear window. If you
do, you could cut or damage the defogger and the
repairs would not be covered by your warranty.
Do not attach a temporary vehicle license, tape, a
decal or anything similar to the defogger grid.
Outlet Adjustment
Use the air outlets located in the center and on the side
of your instrument panel to direct the airflow.
Your vehicle has air outlets that allow you to adjust the
direction and amount of airflow inside the vehicle.
Move the louvers up or down. Use the thumbwheel next
to or underneath the outlet to close the louvers. For
the most efficient airflow and temperature control, keep
the outlet in the fully opened position.
Rear seat outlets can be used to adjust airflow toward
either seating area, thefloor or upward. Move the center
louvers up or down to direct the airflow.
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Operation Tips
•
Keep the hood and front air inlets free of ice, snow,
or any other obstruction (such as leaves). The
heater and defroster will work far better, reducing
the chance of fogging the inside of your windows.
•Keep the air path under the front seats clear
of objects. This helps air to circulate throughout your
vehicle.
•Adding outside equipment to the front of your
vehicle, such as hood-air deflectors, etc., may affect
the performance of the heating and air conditioning
system. Check with your dealer before adding
equipment to the outside of your vehicle.
Rear Air Conditioning System
If your vehicle is equipped with the optional rear air
conditioner it has two rear air conditioning fan speed
selectors. One fan speed selector is located in the
overhead console and the other is located in the
headliner above the second row seats.
To increase and decrease theflow of cooled air to the
rear vents, turn the knob to the fan speed you want.
The knob has three speed positions. To increase
theflow of cooled air, turn the knob clockwise. To
decrease theflow of cooled air, turn it counterclockwise.
To turn the fan off, turn the knob to the off position.Front Control
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To operate the rear system using the front control, just
turn the knob to the fan position you want.
To use the rear control,first turn the front control to the
AUX position. Then, the rear control can be used to
increase and decrease the airflow.Rear Air Conditioning and Heating
System
If your vehicle is equipped with this system, there are
two rear heat and air conditioning controls. One control
is located in the overhead console and the other is
located in the headliner above the second row seats.
The system can be controlled from the front controls as
well as the rear controls.
The front control has three knobs that control airflow
speed, temperature and airflow location. Rear Control
Front Control
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Fan Knob
The fan knob on the left side of the control panel
adjusts the fan speed. To increase airflow, turn the knob
clockwise. To decrease airflow, turn it counterclockwise.
To turn the fan off, turn the knob to the off position.
9(Off):An off setting, located on the front climate
control panel also allows the driver to turn off the
rear seat passenger seat controls from the front seat.
Temperature Knob
The middle knob on the control panel lets you select the
temperature of the airflowing into the passenger
area. Turn the knob clockwise toward the red area for
warmer air. Turn the knob counterclockwise toward
the blue area for cooler air.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
H(Vent):This setting directs the air through the
headliner outlets.
)(Bi-Level):Air is delivered through thefloor outlets
as well as the headliner outlets. Theflow can be
divided between vent andfloor outlets depending upon
where the knob is placed between the settings.
6(Floor):This setting directs most of the air through
thefloor outlets.
To use the rear control,first turn the front control to the
AUX position. Then, the rear control can be used to
adjust the airflow speed, temperature, and airflow
location.Rear Controls
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Fan Knob
The fan knob on the left side of the control panel
adjusts the fan speed. To increase airflow, turn the knob
clockwise. To decrease airflow, turn it counterclockwise.
To turn the fan off, turn the knob to the off position.
9(Off):Turn the knob to this position to turn the rear
seat comfort controls on or off.
Temperature Knob
The middle knob on the control panel lets you select the
temperature of the airflowing into the passenger
area. Turn the knob clockwise toward the red area for
warmer air. Turn the knob counterclockwise toward
the blue area for cooler air.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
H(Vent):This setting directs the air through the
headliner outlets.
)(Bi-Level):Air is delivered through thefloor outlets
as well as the headliner outlets. Theflow can be
divided between vent andfloor outlets depending upon
where the knob is placed between the settings.
6(Floor):This setting directs most of the air through
thefloor outlets.
Rear Air Conditioning and Heating
System and Electronic Climate
Controls
If your vehicle is equipped with this system, there are
controls located in the overhead console and on
the back of the console in the rear seat area. The
system can be controlled from the overhead controls or
the rear controls.
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The overhead control has three knobs that control
airflow speed, temperature and airflow location.
To adjust the airflow speed turn the knob located on the
left side of the control panel. To adjust the air
temperature turn the temperature knob on the center of
the control panel to increase or decrease the
temperature. To regulate airflow location adjust the right
knob on the control panel.
The system also AUTO settings that can automatically
control the fan speed and/or mode of the air delivery
to the rear seating area.
9(Off):An off setting, located on the overhead
climate control panel also allows the driver to turn off the
rear seat passenger seat controls from the front seat.The rear seat controls have the following settings:
O(On/Off):Press this button to turn the rear seat
comfort controls on or off.
%(Mode):Press this button to select the air delivery,
and setting, and AUTO mode.
b(Temperature):Press this button up or down to
increase or decrease the temperature setting.
w9x(Fan):Press this button up or down to adjust
the fan speed. Front Controls
Rear Controls
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Warning Lights, Gages and
Indicators
This part describes the warning lights and gages that
may be on your vehicle. The pictures will help you
locate them.
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause
an expensive repair or replacement. Paying attention to
your warning lights and gages could also save you
or others from injury.
Warning lights come on when there may be or is a
problem with one of your vehicle’s functions. As you will
see in the details on the next few pages, some
warning lights come on briefly when you start the
engine just to let you know they’re working. If you are
familiar with this section, you should not be alarmed
when this happens.Gages can indicate when there may be or is a problem
with one of your vehicle’s functions. Often gages
and warning lights work together to let you know when
there’s a problem with your vehicle.
When one of the warning lights comes on and stays on
when you are driving, or when one of the gages shows
there may be a problem, check the section that tells you
what to do about it. Please follow this manual’s advice.
Waiting to do repairs can be costly–and even
dangerous. So please get to know your warning lights
and gages. They’re a big help.
Your vehicle also has a driver information system that
works along with the warning lights and gages. See
Driver Information Center (DIC) on page 3-53.
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Instrument Panel Cluster
United States Heavy Duty Transmission version shown. Canada and Light Duty Transmission Clusters
similar.
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