engine BUICK TERRAZA 2007 Owner's Guide

The battery can be discharged at idle if the electrical
loads are very high. This is true for all vehicles. This
is because the generator (alternator) may not be
spinning fast enough at idle to produce all the power
that is needed for very high electrical loads.
A high electrical load occurs when several of the
following loads are on: headlamps, high beams,
fog lamps, rear window defogger, climate
control fan at high speed, heated seats, engine
cooling fans, trailer loads, and loads plugged into
accessory power outlets.
EPM works to prevent excessive discharge of the
battery. It does this by balancing the generator’s
output and the vehicle’s electrical needs. It
can increase engine idle speed to generate more
power, whenever needed. It can temporarily
reduce the power demands of some accessories.
Normally, these actions occur in steps or levels,
without being noticeable. In rare cases at the
highest levels of corrective action, this action
may be noticeable to the driver. If so, a Driver
Information Center (DIC) message might be
displayed, such as Battery Saver Active or Battery
Voltage Low. If this message is displayed, it is
recommended that the driver reduce the electrical
loads as much as possible.Battery Run-Down Protection
Your vehicle has a feature to help prevent you
from draining the battery, in case you accidentally
leave the interior lamps on. If you leave any
interior lamps on while the ignition is in lock or off,
they will automatically turn off after 10 minutes.
The lamps will not come back on again until
you do one of the following:
Turn the ignition to RUN or ACCESSORY
Open a closed door, or close and reopen
a door.
Turn the interior lamps on if they are in the
door or override position.
Turn the interior lamps to the door or override
position and then to on again if the interior
lamp control is in the on position.
If your vehicle has less than 15 miles (25 km)
on the odometer, the battery saver will turn off
the lamps after only three minutes.
187

To change the current mode, select one of the
following:
H(Vent):This mode directs air to the instrument
panel outlets.
)(Bi-Level):This mode directs half of the air
to the instrument panel outlets, then directs
the remaining air to the oor outlets. Cooler air is
directed to the upper outlets and warmer air to
the oor outlets.
6(Floor):This mode directs most of the air to
the oor outlets. Use this mode to send air to
the rear of the vehicle. Keep the area under the
front seats free of objects that could obstruct
airow to the rear of the vehicle.
The right knob can also be used to select defog
or defrost mode. For more information, see
“Defogging and Defrosting” later in this section.
Outside Air:This mode will be automatically
selected when your vehicle is in any mode except
maximum air conditioning.
A(Fan):Turn the left knob clockwise or
counterclockwise to increase or decrease the fan
speed. Turn the knob to 0 to turn off the fan.
The fan must be turned on for the air conditioning
compressor to operate.
Temperature Control:Turn the center knob
clockwise or counterclockwise to increase or
decrease the air temperature inside your vehicle.
#(Air Conditioning):Press this button to turn
the air-conditioning system on or off. When it is
pressed, an indicator light in the button will come on
to let you know that air conditioning is activated.
You may notice a slight change in engine
performance when the air conditioning compressor
shuts off and turns on again. This is normal.
The system is designed to make adjustments to
help with fuel economy while still maintaining
the selected temperature.
On hot days, open the windows to let hot inside
air escape; then close them. This helps to reduce
the time it takes for your vehicle to cool down.
It also helps the system to operate more efficiently.
194

The air conditioning system removes moisture
from the air, so you may sometimes notice a
small amount of water dripping underneath your
vehicle while idling or after turning off the
engine. This is normal.
@MAX A/C (Maximum Air Conditioning):
Turn the right knob to this position for maximum
air conditioning. This will select air conditioning
and recirculation for maximum cooling of
your vehicle. This mode directs air to the
instrument panel outlets.
Recirculation:This mode keeps outside air from
coming in the vehicle. It can be used to prevent
outside air and odors from entering your vehicle or
help heat or cool the air inside your vehicle more
quickly. This mode will automatically be selected
when you select maximum air conditioning.
((Heated Seats):Press this button to turn on
the heated seats. The button on the left controls
the driver’s seat and the button on the right
controls the passenger’s seat. SeeHeated Seats
on page 10for additional information.
Defogging and Defrosting
Fog on the inside of windows is a result of high
humidity, or moisture, condensing on the cool
window glass. This can be minimized if the
climate control system is used properly. There
are two modes to clear fog or frost from your
windshield. Use the defog mode to clear
the windows of fog or moisture and warm the
passengers. Use the defrost mode to remove fog
or frost from the windshield more quickly.
Turn the right knob to select the defog or
defrost mode.
-(Defog):This mode directs air to the
windshield and the oor outlets. When you select
this mode, the system runs the air-conditioning
compressor unless the outside temperature is at or
below freezing. The recirculation mode cannot
be selected while in the defog mode.
195

0(Defrost):This mode directs most of the
air to the windshield and the side window outlets,
with some air directed to the oor outlets.
In this mode, the system will automatically run
the air-conditioning compressor, unless the
outside temperature is at or below freezing.
Recirculation cannot be selected while in the
defrost mode.
Do not drive the vehicle until all the windows
are clear.
Rear Window Defogger
The rear window defogger uses a warming grid
to remove fog from the rear window.
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 turned
on again, the defogger will only run for about
ve minutes before turning off. The defogger can
also be turned off by pressing the button again
or by turning off the engine.
Notice:Do not use anything sharp on the
inside of the rear window. If you do, you could
cut or damage the warming grid, 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.
196

)(Bi-Level):This mode directs half of the air
to the instrument panel outlets, then directs
the remaining air to the oor outlets. Cooler air is
directed to the upper outlets and warmer air to
the oor outlets.
6(Floor):This mode directs most of the air to
the oor outlets. Use this mode to send air to
the rear of the vehicle. Keep the area under the
front seats free of objects that could obstruct
airow to the rear of the vehicle.
Outside Air:This mode is automatically selected
when your vehicle is in any mode except
maximum air conditioning.
The right knob can also be used to select defog
or defrost mode. For more information, see
“Defogging and Defrosting” later in this section.
#(Air Conditioning):Press this button to
turn the air conditioning system on or off. When
it is pressed, an indicator light in the button
will come on to let you know that air conditioning
is activated.You may notice a slight change in engine
performance when the air conditioning compressor
shuts off and turns on again. This is normal.
The system is designed to make adjustments to
help with fuel economy while still maintaining
the selected temperature.
On hot days, open the windows to let hot inside
air escape; then close them and switch to
maximum air conditioning mode. This helps to
reduce the time it takes for your vehicle to
cool down. It also helps the system to operate
more efficiently.
The air conditioning system removes moisture
from the air, so you may sometimes notice a small
amount of water dripping underneath your
vehicle while idling or after turning off the engine.
This is normal.((Heated Seats):Press this button to turn on
the heated seats. The button on the left controls
the driver’s seat and the button on the right
controls the passenger’s seat. SeeHeated Seats
on page 10for additional information.
198

Defogging and Defrosting
Fog on the inside of windows is a result of high
humidity, or moisture, condensing on the cool
window glass. This can be minimized if the
climate control system is used properly. There
are two modes to clear fog or frost from your
windshield. Use the defog mode to clear
the windows of fog or moisture and warm the
passengers. Use the defrost mode to remove
fog or frost from the windshield more quickly.
Turn the right knob to select the defog or
defrost mode.
-(Defog):This mode directs air to the
windshield and the oor outlets. When this mode
is selected, the system runs the air conditioning
compressor unless the outside temperature is
at or below freezing.
The recirculation mode cannot be selected while
in the defog mode.
0(Defrost):This mode directs most of the air
to the windshield and the side window outlets,
with some air directed to the oor outlets. In this
mode, the system will automatically run the
air conditioning compressor, unless the outside
temperature is at or below freezing.Recirculation cannot be selected while in the
defrost mode.
Do not drive the vehicle until all the windows
are clear.
Rear Window Defogger
The rear window defogger uses a warming grid
to remove fog from the rear window.
<(Rear Window Defogger):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 turned
on again, the defogger will only run for about
ve minutes before turning off. The defogger can
also be turned off by pressing the button again
or by turning off the engine.
Notice:Do not use anything sharp on the
inside of the rear window. If you do, you could
cut or damage the warming grid, 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.
199

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 briey 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.
207

Speedometer and Odometer
Your speedometer lets you see your speed
in both miles per hour (mph) and kilometers
per hour (km/h). Your odometer shows how far
your vehicle has been driven, in either miles
(used in the United States) or kilometers
(used in Canada).
Your vehicle has a tamper-resistant odometer.
You may wonder what happens if your vehicle
needs a new odometer installed. The new one can
be set to the mileage total of the old odometer.
Trip Odometer
The trip odometer can display how far you have
driven since you last reset it.
For more information seeDIC Operation and
Displays on page 224.
Tachometer
The tachometer displays the engine speed in
revolutions per minute (rpm).
Safety Belt Reminder Light
When the key is turned to RUN or START,
a chime will come on for several seconds to
remind people to fasten their safety belts.
The safety belt light
will also come on
and stay on for several
seconds, then it will
ash for several more.
If the driver remains unbuckled when the ignition
is on and the vehicle is in motion, the chime
and safety belt light will be repeated. You should
buckle your seat belt. If the driver’s belt is
already buckled, neither the chime nor the light
will come on.
209

If the word OFF or the off symbol is lit on the
airbag status indicator, it means that the
passenger sensing system has turned off the
right front passenger’s airbag or airbags.
SeePassenger Sensing System on page 86
for more on this, including important safety
information.
If, after several seconds, all status indicator lights
remain on, or if there are no lights at all, there
may be a problem with the lights or the passenger
sensing system. See your dealer for service.
{CAUTION:
If the off indicator and the airbag readiness
light ever come on together, it means
that something may be wrong with the
airbag system. If this ever happens, have
the vehicle serviced promptly, because
an adult-size person sitting in the right
front passenger seat may not have the
protection of an airbag. SeeAirbag
Readiness Light on page 210.
Charging System Light
The charging system
light will come on
briey when you turn on
the ignition, but the
engine is not running,
as a check to show you
it is working.
It should go out once the engine is running. If it
stays on, or comes on while you are driving,
you may have a problem with the charging system.
It could indicate that you have problems with a
generator drive belt, or another electrical problem.
Have it checked right away. Driving while this
light is on could drain your battery.
If you must drive a short distance with the light on,
be certain to turn off all your accessories, such
as the radio and air conditioner.
213

If the light comes on while you are driving, pull off
the road and stop carefully. You may notice that the
pedal is harder to push. Or, the pedal may go closer
to the oor. It may take longer to stop. If the light is
still on, have the vehicle towed for service. See
Anti-Lock Brake System Warning Light on page 215
andTowing Your Vehicle on page 384.
{CAUTION:
Your brake system may not be working
properly if the brake system warning light
is on. Driving with the brake system
warning light on can lead to an accident.
If the light is still on after you have pulled
off the road and stopped carefully, have
the vehicle towed for service.
Anti-Lock Brake System Warning
Light
Your vehicle has
an Anti-lock Brake
System (ABS)
warning light.
This light should come on for a few seconds
when you turn the ignition key to RUN. If the light
does not come on then, have it xed so it will
be ready to warn you if there is a problem.
If this light stays on longer than normal after you
have started your engine, turn the ignition off.
If the light comes on and stays on when you are
driving, stop as soon as possible and turn the
ignition off. Then start the engine again to reset the
system. If the light still stays on, or comes on
again while you are driving, the ABS needs service
and you do not have anti-lock brakes.
215