2002 PONTIAC BONNEVILLE cooling

2-18
To replace the battery, do the following:
1. Insert a thin coin, or similar object, into the notch
near the key ring. Turn it counterclockwise to
separate the two halves of the transmitter.
2. Once the transmitter is separated, use a pencil eraser
to remove the old battery. Do not use a metal object.
3. Remove and replace the battery. Replace it as the
instructions inside the cover indicate.
4. Snap the transmitter back together tightly to be sure
no moisture can enter.
5. Check the operation of the transmitter.Trunk
CAUTION:
It can be dangerous to drive with the trunk lid
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 trunk lid open or if
electrical wiring or other cable connections must
pass through the seal between the body and the
trunk lid:

Make sure all other windows are shut.

Turn the fan on your heating or cooling
system to its highest speed with the setting
on Vent or with RECIRC turned off. 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.

2-54
Rear Reading Lamps
The rear reading lamps, located over each rear door, will
come on as courtesy lamps when you open any of the
doors while it is dark outside. They will also come on as
part of the interior lighting features listed previously.
To turn on a reading lamp when the doors are closed,
press either button. Press it again to turn the lamp off.
Inadvertent Power Battery Saver
This feature is designed to protect your vehicle's battery
against drainage from the interior lamps, trunk lamp,
glove box lamp or cigarette lighters. When the ignition
is turned off, the power to these features will
automatically turn off after 10 minutes. Power will be
restored for an additional 10 minutes if any door is
opened, the trunk is opened or the courtesy lamps are
turned on. To restore power back to the cigarette lighters
the ignition must be turned back to ON.
Battery Load Management
The battery load management feature is designed to
monitor the vehicle's electrical load and determine when
the battery is in a heavy discharge condition. During
times of high electrical loading, the engine may idle at
higher revolutions per minute (rpm) than normal to
make sure the battery charges. High electrical loads may
occur when several of the following are on: headlamps,
high beams, fog lamps, rear window defogger, fan on
high speed, heated seats and engine cooling fans.

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.
Your vehicle may be equipped with a passenger
compartment air filter. For more information, see
ªPassenger Compartment Air Filterº in the Index.
Standard Climate Control System
FAN: The left knob regulates the force of the air coming
through the system. Push this knob to turn the fan on
and off. Turn the knob clockwise toward HI to increase
the fan speed and counterclockwise toward LO to
decrease the fan speed.The fan must be on in order for
the air conditioning compressor to run.
TEMP (Temperature): The right knob regulates the
temperature of the air coming through the system. Turn
it toward the blue area for cooler air. Turn it toward the
red area for warmer air.

3-6
RECIRC (Recirculation): Press this button to
limit the amount of outside air entering your vehicle.
This is helpful when you are trying to quickly cool the
interior of the vehicle or limit odors entering the vehicle.
RECIRC may be selected in all manual airflow modes
except FRONT defrost. If you select RECIRC while in
FRONT defrost, the RECIRC light will flash to let you
know that this is not allowed by the system. This is to
prevent fogging.
When the weather is cool or damp, operating the system
in recirculation, without also using the air conditioning,
may cause fogging of the windshield. To clear the fog,
switch back to outside air, select defog or FRONT
defrost mode and increase the fan speed. To avoid
refogging of the windows, minimize your use of
recirculation under these conditions and turn the air
conditioning on to help dehumidify the air.
A/C (Air Conditioning): Press this button to
turn the air conditioning compressor on and off. This
system will cool and dehumidify the air inside your
vehicle. The air conditioning compressor will also run
when you select the FRONT defrost mode and outside
temperatures are approximately 40
F (4
C) or
higher. When in AUTO mode, air conditioning will
automatically be used as needed to maintain the selected
temperature setting.AUTO (Automatic Control): Press the AUTO
button for automatic control of the air delivery mode,
fan speed, air conditioning and recirculation. Whenever
AUTO is pressed, the display will show the current
settings for five seconds before returning the display to
exterior temperature and AUTO.
The fan speed and mode of airflow delivery will vary as
the system maintains the selected temperature setting.
The air conditioning compressor will run at outside
temperatures over approximately 40
F (4
C). The air
inlet will normally be set to OUTSIDE AIR. If it is hot
enough outside, the air inlet mode will automatically
switch to recirculation.
To find you comfort zone for the automatic settings,
start with a temperature setting of 75
F (24
C) and
allow about 20 minutes for the system to regulate.
Then turn the TEMP knobs up or down to adjust the
temperature setting if necessary. If you choose the
temperature setting of 60
F (15
C), the system will
remain at the maximum cooling setting and fan speed.
If you choose the temperature setting of 90
F (33
C),
the system will remain at the maximum heat setting and
fan speed. Choosing either maximum setting will not
cause the system to heat or cool any faster.

3-7
Be sure not to cover the sensor located on the top of the
instrument panel near the windshield. This sensor
regulates interior temperatures based on sun load.
To avoid blowing cold air through the system in cold
weather, the automatic system will delay turning on the
fan until warm air is available. The length of delay
depends on engine coolant temperature. Pressing the fan
button will override this delay and cancel the automatic
mode, returning the system to manual mode.
The EXT (exterior) temperature sensor is located in the
front of the vehicle behind the grill. The EXT temperature
displayed may not be accurate for a few minutes if you
have restarted the engine after it was already warmed.
Air Conditioning
On hot days, open the windows long enough to let hot
air inside the vehicle 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.
If you have the standard system, for quick cool
-down on
very hot days, use the airflow from the instrument panel
outlets, press RECIRC and A/C with the temperature knob in
the blue area. If this maximum A/C setting is used for long
periods of time, the air in your vehicle may become too cold
and dry. For normal cooling on hot days, use A/C without
recirculation with the temperature knob in the blue area.If you have the electronic system, in AUTO mode
the system will cool and dehumidify the air inside
the vehicle. Also while in AUTO mode, the system
will maximize its performance by using recirculation
as necessary.
On cool, but sunny days, with the standard system or
through manual operation of the electronic system, use
bi
-level to deliver warm air to the floor and cooler air to
the instrument panel outlets. To warm or cool the air
delivered, turn the temperature knobs.
Heating
If you have the standard system, on cold days use the
floor ducts with the temperature knob in the red area. If
you have the electronic system, press AUTO and adjust
the temperature by turning the temperature knob up or
down. You may also adjust the electronic system
manually by pressing the MODE button and selecting
FLOOR. Again, adjust the temperature by turning the
temperature knobs.
With either system, outside air will be heated and sent
through the floor ducts. The heater works best if you
keep your windows closed while using it.

3-9
NOTICE:
Do not try to clear frost or other material from
the inside of the rear window with a razor blade
or anything else that is sharp. This may damage
the defogger grid. The repairs wouldn't be
covered by your warranty.
Do not attach a temporary vehicle license, tape or decals
across the defogger grid on the rear window.
Ventilation System
For mild outside temperatures when little heating or
cooling is needed, use the vent setting (on the standard
system) to direct outside air through your vehicle. Air will
flow through the instrument panel outlets.
Your vehicle's flow
-through ventilation system supplies
outside air into the vehicle while it's moving. While the
vehicle is not moving, you can get outside air to flow
through by selecting any air delivery mode and any
fan speed.
Your vehicle has air outlets that allow you to adjust the
direction and amount of airflow inside the vehicle.
Move the knob in the center of each outlet up, down or
side
-to-side to direct the air from the outlet. Use the
thumbwheel in the center to shut the outlet off. For the
most efficient airflow and temperature control, keep the
shut off door in the fully opened position.

4-25
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.
CAUTION:
Coasting downhill in NEUTRAL (N) or with the
ignition off is dangerous. Your brakes will have to
do all the work of slowing down. They 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. Always have your engine
running and your vehicle in gear when you
go downhill.

Know how to go uphill. Drive in the highest
gear possible.

Stay in your own lane when driving on two
-lane
roads in hills or mountains. Don't swing wide or cut
across the center of the road. Drive at speeds that let
you stay in your own lane.

As you go over the top of a hill, be alert. There could be
something in your lane, like a stalled car or an accident.

You may see highway signs on mountains that warn of
special problems. Examples are long grades, passing or
no
-passing zones, a falling rocks area or winding
roads. Be alert to these and take appropriate action.

4-41 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, drive belt, 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 this information before you start
your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat during
severe operating conditions. See ªEngine Overheatingº
in the Index.