2002 GMC YUKON tow

3-11
Rear Air Conditioning and Rear Heater
(If Equipped)
If your vehicle has the rear air conditioning and rear
heater system combination, controls are provided to
regulate temperature, location and fan speed.
Front Control
To adjust the airflow speed, turn the fan knob located on
the left side to the desired setting.
To activate the second seat control system, turn the fan
knob on the front overhead control to REAR.To regulate the airflow location, adjust the right knob on
the control panel. Turn the knob clockwise for floor vent
airflow or counterclockwise for headliner vent airflow.
Generally, the instrument panel outlets are used for air
conditioning and the floor vents for heating. The knob
can be set to any blend setting.
To adjust the air temperature, turn the temperature knob
on the center of the control panel.
For warmer air, turn the knob clockwise toward red. For
cooler air, turn the knob counterclockwise toward blue.
Rear Control
The rear control works just like the front control. It
allows second seat passengers to adjust the controls as
they desire. To use the rear control, first turn the knob
on the front control panel to REAR.

3-12 Rear Air Conditioning and Heating
Systems with Electronic Climate Control
System (If Equipped)
Front Control
Rear ControlWith this system the rear passengers can control the
temperature of the air flow for the rear seating area. The
climate control has three controls.
To adjust the airflow speed, turn the fan knob located on
the left side of the control panel.
The system also has a front AUTO setting that can
automatically change the temperature of the rear seating
area based on information from the front control. An
OFF setting, located on the front climate control panel,
also allows the driver to turn off the rear passenger seat
controls from the front seat.
To adjust the air temperature, turn the temperature knob
on the center of the control panel clockwise toward
82
F (28
C) for warmer air. Turn the knob
counterclockwise toward 66
F (19
C) for cooler air.
To regulate the airflow location, adjust the right knob
on the control panel. Turn the knob clockwise for floor
outlets airflow or counterclockwise for headliner vent
airflow. Generally, the instrument panel outlets are used
for air conditioning and the floor vents for heating. The
knob can be set to any blend setting.

3-14 Heating
The heater works best if you keep your windows closed
while using it. On cold days, use the floor or bi
-level
setting with the temperature knob in the red area.
On cold days, approximately 32
F (
-0
C) or lower, if
your vehicle is equipped with an automatic transmission,
you may experience differences in how the transmission
shifts until the engine is warm. This feature automatically
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.
If you use the engine coolant heater before starting your
engine in cold weather, 20
F (
-8
C) or lower, the
heating system will produce warmer air faster to heat the
passenger compartment.
The use of an engine coolant heater also reduces the
time it takes for the engine to reach normal operating
temperature. For more information, see ªEngine Coolant
Heaterº in the Index.
Defogging and Defrosting
On cool, humid days, use defrost setting to keep the
windshield and side windows clear. Use the defrost
setting to remove fog or ice from the windshield in
extremely humid or cold conditions. Use the defrost
setting with the temperature knob toward the red area
and the fan control turned all the way to the right.
Rear Window Defogger (If Equipped)
If you see lines running across the rear window, you
have a rear window defogger. The lines warm the glass.
To turn on the rear window
defogger, press this button
next to the fan knob.
The rear window defogger will only work if the ignition
is in RUN. For best results, clear the window of as much
snow or ice as possible.

4-
4-1
Section 4 Your Driving and the Road
Here you'll find information about driving on different kinds of roads and in varying weather conditions. We've also
included many other useful tips on driving.
4
-2 Defensive Driving
4
-3 Drunken Driving
4
-6 Control of a Vehicle
4
-6 Braking
4
-9 Traction Assist System (TAS) (Option)
4
-12 Steering
4
-14 Off-Road Recovery
4
-15 Passing
4
-16 Loss of Control
4
-18 Off-Road Driving with Your
Four
-Wheel-Drive Vehicle4
-35 Driving at Night
4
-37 Driving in Rain and on Wet Roads
4
-40 City Driving
4
-41 Freeway Driving
4
-42 Before Leaving on a Long Trip
4
-43 Highway Hypnosis
4
-43 Hill and Mountain Roads
4
-45 Winter Driving
4
-49 Recreational Vehicle Towing
4
-53 Loading Your Vehicle
4
-55 Towing a Trailer

4-20
3. Pull the push-pins and
lower air dam assembly
away from the retainers
until the lower air dam
is free.
When you're back on roads, though, be sure to replace
the air dam.
NOTICE:
Operating your vehicle for extended periods
without the front bumper lower air dam installed
can cause improper air flow to the engine and
may allow things like fog lamps or tow hooks on
the front of your vehicle to be damaged. Always
be sure to replace the front bumper air dam
when you're finished off
-road driving.
To reinstall the lower air dam do the following:
1. Line up each push-pin
with its intended retainer
and push the washer
portion of the push
-pin
towards the retainer until
it locks into place.
2. Push the flat end of the
push
-pin towards the
retainer until it locks
into place, making sure
each is secure.

4-49
Then, shut the engine off and close the window almost
all the way to preserve the heat. Start the engine again
and repeat this only when you feel really uncomfortable
from the cold. But do it as little as possible. Preserve the
fuel as long as you can. To help keep warm, you can get
out of the vehicle and do some fairly vigorous exercises
every half hour or so until help comes.
Recreational Vehicle Towing
Recreational vehicle towing means towing your
vehicle behind another vehicle
-- such as behind a
motorhome. The two most common types of
recreational vehicle towing are known as ªdinghy
towingº (towing your vehicle with all four wheels on
the ground) and ªdolly towingº (towing your vehicle
with two wheels on the ground and two wheels up
on a device known as a ªdollyº).
With the proper preparation and equipment, many
vehicles can be towed in these ways. See ªDinghy
Towingº and ªDolly Towing,º following.Here are some important things to consider before you
do recreational vehicle towing:

What's the towing capacity of the towing
vehicle? Be sure you read the tow vehicle
manufacturer's recommendations.

How far will you tow? Some vehicles have
restrictions on how far and how long they can tow.

Do you have the proper towing equipment? See your
dealer or trailering professional for additional advice
and equipment recommendations.

Is your vehicle ready to be towed? Just as you
would prepare your vehicle for a long trip, you'll
want to make sure your vehicle is prepared to be
towed. See ªBefore Leaving on a Long Tripº
in the Index.

4-50 Dinghy Towing
When towing your vehicle, turn the ignition off.
To prevent your battery from draining while towing,
remove the IGN 0 fuse from the instrument panel
fuse block. Be sure to reinstall the fuse when you reach
your destination. See ªFuses and Circuit Breakersº in
the Index.
Tw o
-Wheel-Drive Vehicles
Tw o
-wheel-drive vehicles, should not be towed with
all four wheels on the ground. Two
-wheel-drive
transmissions have no provisions for internal lubrication
while being towed. To properly tow these vehicles, they
should be placed on a platform trailer with all four
wheels off the ground.In rare cases when it's unavoidable that a
two
-wheel-drive vehicle is to be towed with all four
wheels on the ground, the propeller shaft to axle yoke
orientation should be marked and the propeller shaft
removed following the applicable service manual
removal/installation procedure.
Dust or dirt can enter the back of the transmission
through the opening created by removing the propeller
shaft if proper protection is not provided. Also, check
the transmission fluid level before driving the truck.

4-51
Four-Wheel-Drive Vehicles
Use the following procedure to tow your vehicle:
1. Firmly set the parking brake.
2. Shift an automatic transmission to PARK (P), or a
manual transmission to FIRST (1).3. Securely attach the vehicle being towed to the
tow vehicle.
4. Shift the transfer case to NEUTRAL. See
ªFour
-Wheel Driveº in the Index for the proper
procedure to select the NEUTRAL position for
your vehicle.
5. Release the parking brake only after the vehicle
being towed is firmly attached to the towing vehicle.
6. Turn the ignition off.
CAUTION:
Shifting a four-wheel-drive vehicle's transfer
case into NEUTRAL can cause your vehicle to
roll even if the transmission is in Park (P). You or
others could be injured. Make sure the parking
brake is firmly set before you shift the transfer
case to NEUTRAL.