2000 PONTIAC BONNEVILLE climate control

2-32
Running Your Engine While
You're Parked
It's better not to park with the engine running. But if you
ever have to, here are some things to know.
CAUTION:
Idling the engine with the climate control system
off could allow dangerous exhaust into your
vehicle (see the earlier Caution under
ªEngine Exhaustº).
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle even if
the fan switch is at the highest setting. One place
this can happen is a garage. Exhaust
-- with
CO
-- can come in easily. NEVER park in a
garage with the engine running.
Another closed-in place can be a blizzard.
(See ªBlizzardº in the Index.)
CAUTION:
It can be dangerous to get out of your vehicle if
the shift lever is not fully in PARK (P) with the
parking brake firmly set. Your vehicle can roll.
Don't leave your vehicle when the engine is
running unless you have to. If you've left the
engine running, the vehicle can move suddenly.
You or others could be injured. To be sure your
vehicle won't move, even when you're on fairly
level ground, always set your parking brake and
move the shift lever to PARK (P).
Follow the proper steps to be sure your vehicle won't
move. See ªShifting Into PARK (P)º in the Index.
If you are parking on a hill and if you're pulling a
trailer, also see ªTowing a Trailerº in the Index.

3-2
Comfort Controls
This section tells you how to make your air system work
for you.
With these systems, 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.
Comfort Controls Personalization
(If Equipped)
This feature allows two different drivers to store and
recall their own climate control settings for temperature,
air delivery mode and fan speed. The personal choice
settings recalled are determined by the transmitter used
to enter the vehicle. After the button with the unlock
symbol on a remote keyless entry transmitter is pressed,
and the ignition is in RUN, the climate control will
adjust to the last settings of the identified driver. The
settings can also be changed by pressing one of the
memory buttons (1 or 2) located on the driver's door,
until you hear two beeps. When adjustments are made,
the new settings are automatically saved for that driver.
Standard Climate Control System
Fan Knob
The left knob regulates the force of the air coming
through the system. Turn the knob clockwise to increase
the fan speed and counterclockwise to decrease the fan
speed. Push the knob to turn the fan off. The fan must
be on to run the air conditioning compressor.
Temperature Knob
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.

3-4
When the weather is cool or damp, operating in
RECIRC for extended periods of time may cause
fogging of the vehicle's windows. To clear the fog,
switch back to outside air by turning off RECIRC, select
either DEFOG or FRONT defrost mode and increase the
fan speed. To avoid refogging of the windows, minimize
your use of RECIRC under these conditions and turn the
A/C on to help dehumidify the air.
A/C Button
A/C: Press this button to turn the air conditioning
compressor on and off. The system will cool and
dehumidify the air inside your vehicle. If your comfort
control system is off, you can also turn it back on in
PANEL mode by selecting the A/C button.
Even though A/C is not selected, in FRONT defrost
mode the A/C compressor will run automatically at
temperatures over approximately 40
F (4
C) to
improve windshield clearing performance.
Electronic Climate Control System (Option)
Temperature Knob (Driver's Side)
The driver's side knob changes the temperature of the
air coming through the system on the driver's side.
Turn the knob toward the blue area to decrease the
set temperature. Turn the knob toward the red area to
increase the set temperature. When this knob is adjusted,
the word DRIVER will be displayed under the set
temperature. When the passenger's set temperature is
not active, this knob controls both the driver's and
passenger's side, and both DRIVER and PASS will be
displayed under the set temperature.

3-5
Temperature Knob (Passenger's Side)
The passenger's side knob changes the temperature of
the air coming through the system on the passenger's
side of the vehicle. Turn the knob toward the blue area
to decrease the set temperature. Turn the knob toward
the red area to increase the set temperature. When this
knob is adjusted, only the word PASS will be displayed
under the set temperature.
Fan Button
The button with the fan symbol allows you to manually
adjust the fan speed. Press the HIGH side to increase fan
speed and the LOW side to decrease fan speed.
Mode Button
Press this button to manually select the air delivery mode
to the floor, panel or windshield outlets. The system will
stay in the selected mode until the MODE or AUTO
button is pushed.Auto Button
Press the AUTO button to set the system to
automatically control the air delivery mode, fan speed,
A/C and RECIRC operations. Whenever you press
AUTO, the display will change to show the current
driver set temperature, automatic air delivery mode and
fan speed. After five seconds the display will change
back to the EXT (external) temperature outside
the vehicle.
Display
In full AUTO mode, the electronic climate control
system display will show the outside temperature,
labeled EXT for external temperature, and AUTO.
If you press the MODE button to select an air delivery
mode, the display will change to also show you the
current system mode. If you press HIGH or LOW on the
fan button, the display will change to show the selected
fan speed. After five seconds, the display will change
back to show the EXT temperature and the selected
manual setting.

3-6
Automatic Operation
When the system is set for AUTO, your climate control
system will control the air delivery mode, fan speed,
A/C and RECIRC operations. Air will come from
the floor, panel or windshield outlets. The fan speed
will vary as the system maintains the selected
temperature setting.
When AUTO is selected, the A/C operation and air inlet
will be automatically controlled. 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's hot outside, the air inlet will
automatically switch to recirculated inside air to help
quickly cool down your vehicle.
To find your comfort zone, start with 75
F (24
C)
temperature setting and allow about 20 minutes for the
system to regulate. Turn the TEMP knob 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.Be careful not to cover the sensor located on the top of
the instrument panel near the windshield. This sensor
regulates temperature based on sun load.
The EXT (exterior) temperature sensor is located in the
front of the vehicle behind the grille. The displayed
temperature is most accurate after the vehicle has been
moving for a few minutes. If the vehicle is stopped and
then restarted within 2 1/2 hours, the sensor will be hot
from the engine heat. In this case, the temperature first
displayed will continue to be the previous temperature.
The display will update after the vehicle has been
moving for a few minutes and the sensor has a chance
to cool down to the actual temperature.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on engine coolant
temperature. Pushing the fan button will override this
delay and change the fan to a selected speed.

6-48 Uniform Tire Quality Grading
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance.
(This applies only to vehicles sold in the United States.)
The grades are molded on the sidewalls of most
passenger car tires. The Uniform Tire Quality Grading
system does not apply to deep tread, winter
-type snow
tires, space
-saver or temporary use spare tires, tires with
nominal rim diameters of 10 to 12 inches (25 to 30 cm),
or to some limited
-production tires.
While the tires available on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform to Federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions on a specified government test course. For
example, a tire graded 150 would wear one and a half
(1 1/2) times as well on the government course as a tire
graded 100. The relative performance of tires depends
upon the actual conditions of their use, however, and
may depart significantly from the norm due to variations
in driving habits, service practices and differences in
road characteristics and climate.
Traction -- AA, A, B, C
The traction grades, from highest to lowest, are AA, A,
B, and C. Those grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test surfaces of
asphalt and concrete. A tire marked C may have poor
traction performance. Warning: The traction grade
assigned to this tire is based on straight
-ahead braking
traction tests, and does not include acceleration,
cornering, hydroplaning, or peak traction characteristics.