2002 BUICK RANDEZVOUS cooling

2-21 Exiting Programming Mode
To exit programming mode, do one of the following:

Press the odometer button, while in odometer mode,
for two seconds, or

turn the ignition key out of ON, or

do not program any commands for one minute while
in programming mode, or

shift out of PARK (P). See ªShifting Out of
PARK (P)º in the Index.
The programming mode message will turn off to let you
know that you are no longer in the programming mode.
Liftgate
CAUTION:
It can be dangerous to drive with the liftgate
open because carbon monoxide (CO) gas can
come into your vehicle. You can't see or smell
CO. It can cause unconsciousness and even death.
If you must drive with the liftgate open or if
electrical wiring or other cable connections
must pass through the seal between the body and
the liftgate:

Make sure all other windows are shut.

Turn the fan on your heating or cooling
system to its highest speed with the setting
on bi
-level (outside air button is pressed).
That will force outside air into your vehicle.
See ªComfort Controlsº in the Index.

If you have air outlets on or under the
instrument panel, open them all the way.
See ªEngine Exhaustº in the Index.

3-2
Comfort Controls
This section tells you how to make your air system work
for you.
With this system, you can control the heating, cooling
and ventilation in your vehicle. Your vehicle also has
a flow
-through ventilation system described later in
this section.
Dual Manual Comfort Control
Fan Knob
The left knob is used to select the force of air you want.
Turn the knob clockwise to increase fan speed and
counterclockwise to decrease fan speed. The fan must be
turned on for the air conditioning compressor to operate.Temperature Knob
The center knob controls the temperature of the air
coming through the system. 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 is used to select and determine the
direction of the air flowing into the vehicle.
(Upper): This setting directs air through the
instrument panel outlets and the rear console outlets.
(Bi-Level): This setting directs air into your
vehicle in two ways. Cooler air is directed toward your
upper body through the front instrument panel outlets
and the rear console outlets, while warmed air is
directed through the heater ducts at your feet.
(Lower): This setting brings in most of the air
through the floor ducts. It is also used to send air to the
rear of the vehicle. Keep the area under the front seats
free of objects that could obstruct airflow to the rear of
the vehicle.

3-3
(Defog): This setting directs air to the windshield
and through the floor ducts. This mode is particularly
useful during cold or inclement weather because of your
vehicle's larger windshield area.
(Defrost): This setting directs most of the air to the
windshield and side window vents.
Mode Buttons
(Recirculation): Press this button (the light will
glow) to recirculate the air inside of your vehicle and to
limit the amount of outside air and/or odors entering
the vehicle.
Press this button again (the light will go off) to send
outside air into your vehicle. Using this setting while
trying to defrost or defog the windows will help clear
the vents of moisture. When the defog, defrost or lower
setting is selected, the system will automatically go to
outside air mode.
Operating the Heating/Ventilation/Air Conditioning
(HVAC) system in the recirculation mode may cause
fogging of the vehicle's windows when the weather
is cold and damp. To clear the fog, switch the HVAC
system to either the defog or defrost mode and increase
the fan speed. To avoid refogging of the windows,
operate the HVAC system in the outside air mode.Air Conditioning
On very hot days, your vehicle will cool down more
quickly and economically if you open the windows long
enough to let hot, inside air escape. For all settings,
adjust the temperature knob and fan speed as desired.
To get maximum cooling or a quick cool
-down on
very hot days, press the A/C and recirculation buttons
(the lights will glow) and turn the temperature knob
counterclockwise (toward the blue area). Then, adjust
the mode knob to direct the air to the desired location.
This setting should not be used for long periods of time
because the air may become too cold and dry.
Push the A/C button again (the light will go off) to turn
off the air conditioning.
When the air conditioner compressor is on, you may
sometimes notice slight changes in your vehicle's engine
performance and power. This is normal. The system is
designed to help fuel economy while it maintains the
desired cooling level.
The air conditioner removes moisture from the air, so
you may sometimes notice water dripping from under
your vehicle's engine compartment when it is idling or
after it has been turned off. This is normal.

3-6
Passenger's Temperature Control
The passenger's temperature knob adjusts the
temperature on the passenger's side of the vehicle so
it is warmer or cooler than the temperature set by the
driver. The passenger temperature setting is shown
under the words PASS TEMP in the display.
Turn the knob clockwise to raise the temperature and
counterclockwise to lower the temperature. The display
will not show the passenger's temperature
-- only that
of the driver. Indicators under the words PASS TEMP in
the display will show passenger temperature relative
driver's set temperature.
The large single bar in the center of the + and
- symbols
(neutral) indicates the same temperature as the driver.
The bars between the center bar and the + symbol
indicate a warmer temperature setting than the driver.
The bars between the center bar and the
- symbol
indicate a cooler temperature setting than the driver.
Manual Control
You can also manually control the heating, cooling
and ventilation in your vehicle. You can select airflow
direction, fan speed, outside or recirculated air and air
compressor operation by using the following:Mode Button
This button has several settings to control direction of
airflow when the system is not in AUTO. To access the
various modes available, continue to press MODE until
the desired mode appears in the display.
(Defog): This setting directs half of the air to
the floor ducts and half to the defroster and side
window vents.
(Bi-Level): This setting directs half of the air
through the instrument panel outlets. Most of the
remaining air is directed through the floor ducts and
a little to the defroster and side window vents.
(Upper): This setting directs air through the
instrument panel outlets.
(Lower): This setting brings in most of the air
through the floor ducts. The rest comes out of the
defroster and side window vents.
(Defrost): This setting brings in outside air and
directs most of the air through the defrost vent. Some of
the air also goes to the floor ducts and the side window
defogger outlets. The air conditioning compressor will
run automatically in this setting unless the outside
temperature is below 32
F (0
C).

3-7
Mode Buttons
VENT: This button turns the air conditioning
compressor on and off and changes the mode to
upper. The words A/C OFF are shown in the display.
Recirculation is not permitted when the compressor
is off. The system will try to control the temperature
automatically, but without the compressor.
(Recirculation): Press this button
(the recirculation symbol in the display will be lit) to
recirculate the air inside of your vehicle and to limit the
amount of outside air and/or odors entering the vehicle.
Press this button again (the recirculation symbol will
go off) to send outside air into your vehicle. Using this
setting while trying to defrost or defog the windows will
help clear the vents of moisture. When the defog, defrost
or lower setting is selected, the system will
automatically go to outside air mode.
Operating the Heating/Ventilation/Air Conditioning
(HVAC) system in the recirculation mode may cause
fogging of the vehicle's windows when the weather
is cold and damp. To clear the fog, switch the HVAC
system to either the defog or defrost mode and increase
the fan speed. To avoid refogging of the windows,
operate the HVAC system in the outside air mode.Air Conditioning
On very hot days, your vehicle will cool down more
quickly and economically if you open the windows long
enough to let hot, inside air escape. For all settings,
adjust the temperature knob and fan speed as desired.
To get maximum cooling or a quick cool
-down on very
hot days, press the recirculation button (the recirculation
symbol in the display will be lit) and turn the
temperature knob to the desired interior temperature.
Then, select the mode to direct the air to the desired
location. This setting should not be used for long
periods of time because the air may become too cold
and dry.
Push the recirculation button again (the recirculation
symbol will go off) to turn off recirculation.
When the air conditioner compressor is on, you may
sometimes notice slight changes in your vehicle's engine
performance and power. This is normal. The system is
designed to help fuel economy while it maintains the
desired cooling level.
The air conditioner removes moisture from the air, so
you may sometimes notice water dripping from under
your vehicle's engine compartment when it is idling or
after it has been turned off. This is normal.

4-26
Hill and Mountain Roads
Driving on steep hills or mountains is different from
driving in flat or rolling terrain.If you drive regularly in steep country, or if you're
planning to visit there, here are some tips that can make
your trips safer and more enjoyable.

Keep your vehicle in good shape. Check all fluid
levels and also the brakes, tires, cooling system
and transaxle. These parts can work hard on
mountain roads.

Know how to go down hills. The most important
thing to know is this: let your engine do some of the
slowing down. Shift to a lower gear when you go
down a steep or long hill.
CAUTION:
If you don't shift down, your brakes could get
so hot that they wouldn't work well. You would
then have poor braking or even none going
down a hill. You could crash. Shift down to let
your engine assist your brakes on a steep
downhill slope.

4-41 Driving with a Trailer
CAUTION:
If you have a rear-most window open and you
pull a trailer with your vehicle, carbon monoxide
(CO) could come into your vehicle. You can't see
or smell CO. It can cause unconsciousness or
death. See ªEngine Exhaustº in the Index.
To maximize your safety when towing a trailer:

Have your exhaust system inspected for
leaks, and make necessary repairs before
starting on your trip.

Keep the rear
-most windows closed.

If exhaust does come into your vehicle
through a window in the rear or another
opening, drive with your front, main
heating or cooling system on and with the
fan on any speed. This will bring fresh,
outside air into your vehicle. Do not use
recirculation because it only recirculates
the air inside your vehicle. See ªComfort
Controlsº in the Index.
Towing a trailer requires a certain amount of experience.
Before setting out for the open road, you'll want to get
to know your rig. Acquaint yourself with the feel of
handling and braking with the added weight of the
trailer. And always keep in mind that the vehicle you are
driving is now a good deal longer and not nearly as
responsive as your vehicle is by itself.
Before you start, check the trailer hitch and platform
(and attachments), safety chains, electrical connector,
lamps, tires and mirror adjustment. If the trailer has
electric brakes, start your vehicle and trailer moving and
then apply the trailer brake controller by hand to be sure
the brakes are working. This lets you check your
electrical connection at the same time.
During your trip, check occasionally to be sure that the
load is secure, and that the lamps and any trailer brakes
are still working.

4-44 When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:

start your engine,

shift into a gear, and

release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you're
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transaxle fluid (don't overfill),
engine oil, belts, cooling system and brake system.
Each of these is covered in this manual, and the Index
will help you find them quickly. If you're trailering, it's
a good idea to review these sections before you start
your trip.
Check periodically to see that all hitch nuts and bolts
are tight.