2007 BUICK LACROSSE fuel

Tire Pressure Light
This light should come
on briey as you start
the engine.
This light will also come on when one or more of
your tires is signicantly under-inated. Stop
and check your tires as soon as it is safe to do so.
If underinated, inate them to the proper
pressure. SeeTires on page 402This light will
ash for 60 seconds and then turn on solid
if a problem is detected with the Tire Pressure
Monitor System. SeeTire Pressure Monitor
System on page 411.
Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation of
the fuel, ignition,
and emission control
systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to assure that emissions are at acceptable
levels for the life of the vehicle, helping to produce
a cleaner environment. The check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will be
indicated by the system before any problem is
apparent. This may prevent more serious damage
to your vehicle. This system is also designed to
assist your service technician in correctly
diagnosing any malfunction.
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Notice:If you keep driving your vehicle
with this light on, after awhile, your emission
controls may not work as well, your fuel
economy may not be as good, and your engine
may not run as smoothly. This could lead to
costly repairs that may not be covered by
your warranty.
Notice:Modications made to the engine,
transaxle, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and may
cause this light to come on. Modications to
these systems could lead to costly repairs not
covered by your warranty. This may also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 341.This light should come on, as a check to show
you it is working, when the ignition is on and the
engine is not running. If the light does not
come on, have it repaired. This light will also
come on during a malfunction in one of two ways:
Light Flashing— A misre condition has
been detected. A misre increases vehicle
emissions and may damage the emission
control system on your vehicle. Diagnosis and
service may be required.
Light On Steady— An emission control
system malfunction has been detected on your
vehicle. Diagnosis and service may be
required.
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If the Light is Flashing
The following may prevent more serious damage
to your vehicle:
Reducing vehicle speed
Avoiding hard accelerations
Avoiding steep uphill grades
If you are towing a trailer, reduce the amount of
cargo being hauled as soon as it is possible
If the light stops ashing and remains on steady,
see “If the Light Is On Steady” following.
If the light continues to ash, when it is safe to do
so, stop the vehicle. Find a safe place to park
your vehicle. Turn the key off, wait at least
10 seconds and restart the engine. If the light
remains on steady, see “If the Light Is On Steady”
following. If the light is still ashing, follow the
previous steps, and see your dealer for service as
soon as possible.
If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully
install the cap. SeeFilling the Tank on page 346.
The diagnostic system can determine if the fuel cap
has been left off or improperly installed. A loose or
missing fuel cap will allow fuel to evaporate into the
atmosphere. A few driving trips with the cap
properly installed should turn the light off.
Did you just drive through a deep puddle
of water?
If so, your electrical system may be wet. The
condition will usually be corrected when the
electrical system dries out. A few driving trips
should turn the light off.
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Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 343. Poor fuel
quality will cause your engine not to run as
efficiently as designed. You may notice this as
stalling after start-up, stalling when you put
the vehicle into gear, misring, hesitation on
acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is
warmed up.) This will be detected by the system
and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at
least one full tank of the proper fuel to turn the
light off.
If none of the above steps have made the light
turn off, your dealer can check the vehicle.
Your dealer has the proper test equipment and
diagnostic tools to x any mechanical or electrical
problems that may have developed.Emissions Inspection and Maintenance
Programs
Some state/provincial and local governments have
or may begin programs to inspect the emission
control equipment on your vehicle. Failure to pass
this inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
check engine light is on or not working properly.
Your vehicle will not pass this inspection if
the OBD (on-board diagnostic) system determines
that critical emission control systems have not
been completely diagnosed by the system.
The vehicle would be considered not ready for
inspection. This can happen if you have recently
replaced your battery or if your battery has
run down. The diagnostic system is designed to
evaluate critical emission control systems
during normal driving. This may take several days
of routine driving. If you have done this and
your vehicle still does not pass the inspection for
lack of OBD system readiness, your dealer
can prepare the vehicle for inspection.
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Fuel Gage
The fuel gage indicates
about how much fuel is
left in the fuel tank
when the ignition is on.
When the indicator nears empty, there is still a
little fuel left, but you should get more fuel soon.
Here are four things that some owners ask
about. All these things are normal and do not
indicate that anything is wrong with the fuel gage:
At the gas station, the pump shuts off before
the gage reads full.
It takes more, or less, fuel to ll up than the
gage reads. For example, the gage reads
half full, but it took more, or less, than half of
the tank’s capacity to ll it.
The gage pointer may move while cornering,
braking or accelerating.
The gage may not indicate empty when the
ignition is turned off.
Low Fuel Warning Light
Your vehicle may have a low fuel light. It is
located on the fuel gage and will come on and a
chime will sound periodically when the vehicle
is low on fuel. The light will go off when fuel
is added to the fuel tank.
It will also come on for a few seconds when the
ignition is turned on as a check to indicate it is
working. If it does not come on then, have it xed.
For vehicles with a Driver Information Center (DIC),
a LOW FUEL message will appear. SeeDIC
Warnings and Messages on page 208for more
information.
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Check Gas Cap Light
Your vehicle may have
a check gas cap light.
This light will come on and a chime will sound if
your gas cap is not securely fastened.
SeeMalfunction Indicator Lamp on page 190and
Filling the Tank on page 346for more information.
Driver Information Center (DIC)
Your vehicle may have a Driver Information
Center (DIC).
All messages will appear in the DIC display
located in the instrument panel cluster, below the
speedometer. The DIC buttons are located on
the center of the instrument panel, below
the center outlets.
The DIC comes on when the ignition is on. After a
short delay, the DIC on the uplevel vehicle will
display the WELCOME DRIVER (1 or 2) if apersonalized key 1 or 2 is used, and then the
information that was last displayed before
the engine was turned off.
The DIC on the base level vehicle displays the
odometer and trip odometers only.
The DIC on the uplevel vehicle displays the
odometer, trip odometers, fuel economy, trip
computer, vehicle system, and compass display
information. It also displays warning messages if a
system problem is detected. In addition, the DIC
on the uplevel vehicle displays phone numbers
that are called using the OnStar
®system, if
equipped. SeeOnStar®System on page 126.
The outside air temperature automatically appears
in the bottom right corner of the uplevel DIC
display when viewing the trip/odometer screens,
fuel screens and some of the gages screens. If the
outside air temperature is at or below 37°F
(3°C), the temperature reading will toggle between
displaying the outside temperature and the
word ICE for two minutes. If there is a problem
with the system that controls the temperature
display, the letters OC (open circuit) or SC (short
circuit) will appear on the display. If this occurs,
have the vehicle serviced by your dealer.
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The DIC on the uplevel vehicle also allows some
features to be customized or personalized.
SeeDIC Vehicle Personalization on page 229for
more information.
DIC Operation and Displays
The DIC has different modes which can be
accessed by pressing the DIC buttons located on
the center of the instrument panel. Depending
on whether your vehicle has the base level
or uplevel DIC, the buttons and modes available
will differ.
The buttons on the base level vehicle are the
trip/odometer and English/Metric buttons.
The buttons on the uplevel vehicle are the trip/
odometer, fuel, gages, set/reset, and option
buttons.
The button functions are detailed in the
following pages.
DIC Buttons
TRIP/ODO (Trip/Odometer):Press this button on
the base level vehicle to display the odometer
and trip distance.
Press this button on the uplevel vehicle to display
the odometer, trip distance, time elapsed, and
average speed.
E/M (English/Metric)**:Press this button on the
base level vehicle to select between English
or Metric units.
To select between English or Metric units on the
uplevel vehicle, see “Units” later in this section.
.(Fuel)*:Press this button to display the
fuel range and average fuel economy.
2(Gages)*:Press this button to display the
battery voltage, oil life, and tire pressure readings.
Uplevel shown
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Fuel Menu Items (Uplevel Only)
.
(Fuel):Press this button to scroll through the
following menu items:
Fuel Range
Press the fuel button until FUEL RANGE displays.
This mode shows the approximate number of
remaining miles or kilometers the vehicle can be
driven without refueling.
Fuel range is based on several factors, including
distance traveled, fuel used, fuel capacity, etc.
This estimate will change if driving conditions
change. For example, if driving in traffic and
making frequent stops, this mode may read
one number, but if the vehicle is driven on a
freeway, the number may change even though the
same amount of fuel is in the fuel tank. This is
because different driving conditions produce
different fuel economies. Generally, freeway
driving produces better fuel economy than city
driving. Fuel range cannot be reset.
If your vehicle is low on fuel, FUEL RANGE LOW
will display followed by the LOW FUEL message.
See “LOW FUEL” underDIC Warnings and
Messages on page 208for more information.
Average Fuel Economy
Press the fuel button until AVG ECONOMY
displays. This mode shows the approximate
average miles per gallon (mpg) or liters per
100 kilometers (L/100 km). This number is
calculated based on the number of mpg (L/100 km)
recorded since the last time this menu item was
reset. To reset AVG ECONOMY, press and hold
the set/reset button. The display will return to zero.
Gages Menu Items (Uplevel Only)
2
(Gages):Press this button to scroll through
the following menu items:
Battery
Press the gages button until BATTERY displays.
This mode shows the current battery voltage.
Your vehicle’s charging system regulates voltage
based on the state of the battery. The battery
voltage may uctuate when viewing this
information on the DIC. This is normal.
If there is a problem with the battery charging
system, a DIC message will display. See
DIC Warnings and Messages on page 208for
more information.
SeeElectric Power Management on page 163for
more information.
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