engine BUICK LACROSSE 2007 Service Manual

Low Washer Fluid Warning Light
This light will come on
briey when the ignition
is on. If the light stays
on, a chime will
sound indicating your
windshield washer
uid is low.
SeeWindshield Washer Fluid on page 380for
more information.
Door Ajar Light
When the ignition is on,
this light will stay on until
all doors are closed and
completely latched.
You will hear a chime if a door is unlatched after
the engine is started and the vehicle is not in
PARK (P).
Trunk Ajar Light
This light will come on
and a chime will sound
if the trunk is ajar and
the vehicle is not in
PARK (P).
Try closing the trunk again. Never drive with the
trunk open.
Service Vehicle Soon Light
Your vehicle may have
this light.
It will come on and a chime will sound if it detects
a problem on the vehicle.
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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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Tire Pressure
Press the gages button until FRONT TIRE
PRESSURE displays. This mode shows the
pressure for the front tires. To view the pressure
for the rear tires, press the gages button again
until REAR TIRE PRESSURE displays. The
tire pressure will be shown in either pounds per
square inch (psi) or kilopascals (kPa).
If a low or high tire pressure condition is detected
by the system while driving, a message advising
you to check the pressure in a specic tire
will appear in the display. SeeInation - Tire
Pressure on page 409andDIC Warnings
and Messages on page 208for more information.
If the tire pressure display shows dashes
instead of a value, there may be a problem with
your vehicle. If this consistently occurs, see
your dealer for service.
Oil Life
Press the gages button until OIL LIFE displays.
This mode shows an estimate of the oil’s
remaining useful life. If you see OIL LIFE 99% on
the display, that means 99% of the current oil
life remains. The engine oil life system will alert
you to change your oil on a schedule consistent
with your driving conditions.
When the remaining oil life is low, the CHANGE OIL
SOON message will appear on the display. You
should change your oil as soon as possible. See
Engine Oil on page 353. In addition to the engine oil
life system monitoring the oil life, additional
maintenance is recommended in the Maintenance
Schedule in this manual. SeeScheduled
Maintenance on page 462for more information.
Remember, you must reset the OIL LIFE yourself
after each oil change. It will not reset itself.
Also, be careful not to reset the OIL LIFE
accidentally at any time other than when the oil
has just been changed. It cannot be reset
accurately until the next oil change. To reset the
engine oil life system, seeEngine Oil Life
System on page 356. The display will show 100%
when the system is reset.
204

DIC Warnings and Messages
Messages are displayed on the uplevel DIC to
notify the driver that the status of the vehicle has
changed and that some action may be needed
by the driver to correct the condition. Multiple
messages may appear one after another.
Some messages may not require immediate
action, but you can press any of the DIC buttons
on the uplevel vehicle to acknowledge that
you received the message and clear it from the
DIC display.
Some messages cannot be cleared from the DIC
display because they are more urgent. These
messages require action before they can be
cleared.
If there are any active warning messages when
the vehicle is turned off, two chimes sound and the
DIC goes into a reminder mode. The reminder
mode displays any active message. If there
are multiple messages, the DIC displays each
message for ve seconds. After each active
message is displayed once, the reminder mode
turns off.You should take any messages that appear on the
display seriously and remember that clearing
the messages will only make the messages
disappear, not correct the problem.
The following are the possible messages that can
be displayed and some information about them.
A/C OFF FOR ENGINE PROTECTION
This message displays when the engine coolant
becomes hotter than the normal operating
temperature. SeeEngine Coolant Temperature
Gage on page 189. To avoid added strain on a hot
engine, the air conditioning compressor is
automatically turned off. When the coolant
temperature returns to normal, the air conditioning
compressor turns back on. You can continue to
drive your vehicle.
This message comes on while the ignition is in
RUN. Press any of the DIC buttons to acknowledge
this warning message and to clear it from the
screen.
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This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on. If this message
continues to appear, have the system repaired by
your dealer as soon as possible to avoid
damage to the engine.
BATTERY SAVER ACTIVE
This message displays when the system detects
that the battery voltage is dropping beyond a
reasonable level. The battery saver system starts
reducing certain features of the vehicle that
you may be able to notice. At the point that the
features are disabled, this message is displayed.
It means that the vehicle is trying to save the
charge in the battery.
Turn off all unnecessary accessories to allow the
battery to recharge.
The normal battery voltage range is 11.5 to
15.5 volts. If your vehicle has an uplevel DIC, you
can monitor the battery voltage by pressing the
gages button until BATTERY displays.
CHANGE OIL SOON
This message displays when service is required
for the vehicle. See your dealer. SeeEngine Oil on
page 353andScheduled Maintenance on
page 462for more information.
The CHANGE OIL SOON message is reset by
acknowledging the message. The OIL LIFE screen
under the gages menu on the DIC must also be
reset. See “Oil Life” underDIC Operation and
Displays on page 200andEngine Oil Life System
on page 356.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
209

CHARGING SYSTEM FAILURE
This message displays when there is a problem
with the generator and battery charging systems.
Driving with this problem could drain the battery.
Turn off all unnecessary accessories. Stop
and turn off the vehicle as soon as it is safe to do
so. Have the electrical system checked by your
dealer immediately.
This message displays and a chime sounds while
the ignition is in RUN. Press any of the DIC
buttons to acknowledge this message and to clear
it from the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
CHECK GAS CAP
This message may display if the fuel cap is not
on, or is not fully tightened. The check gas
cap light also appears on the instrument panel
cluster. SeeCheck Gas Cap Light on page 199.
Check the fuel cap to ensure that it is on properly.
The diagnostic system can determine if the fuel
cap has been left off or improperly installed.
A loose or missing fuel cap allows fuel to
evaporate into the atmosphere. A few driving trips
with the cap properly installed should turn this
message off. SeeFilling the Tank on page 346for
more information.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
210

CHECK TIRE PRESSURE
This message displays when the tire pressure in
one of the tires needs to be checked. This
message also displays LEFT FRONT, RIGHT
FRONT, LEFT REAR, or RIGHT REAR to indicate
which tire needs to be checked. You can receive
more than one tire pressure message at a time. To
read the other messages that may have been
sent at the same time, press the set/reset button.
If a tire pressure message appears on the
DIC, stop as soon as you can. Have the tire
pressures checked and set to those shown on the
Tire Loading Information label. SeeTires on
page 402,Loading Your Vehicle on page 319, and
Ination - Tire Pressure on page 409. The DIC
display also shows the tire pressure values for the
front and rear tires by pressing the gages
button. SeeDIC Operation and Displays on
page 200. If the tire pressure is low, the low tire
pressure warning light comes on. SeeTire
Pressure Light on page 190.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
DELAYED LOCKING
This message displays to inform the driver that
even though a door lock switch or the lock button
on the Remote Keyless Entry (RKE) transmitter
has been pressed, that actual locking of the doors
is being delayed because the delayed locking
feature has been activated in the DIC. See
“DELAYED LOCKING” underDIC Vehicle
Personalization on page 229for more information.
This message appears and a chime sounds
when the ignition is off.
This message cannot be acknowledged.
211

DRIVER’S DOOR AJAR
This message displays when the driver’s door is
not closed properly. Make sure that the driver’s
door is closed completely.
This message displays while the ignition is in
RUN. A chime sounds when the ignition is shifted
out of PARK (P). Press any of the DIC buttons
to acknowledge this message and to clear it from
the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
DRIVER’S REAR DOOR AJAR
This message displays when the driver’s side rear
door is not closed properly. Make sure that the
driver’s side rear door is closed completely.
This message displays while the ignition is in RUN.
A chime sounds when the ignition is shifted out
of PARK (P). Press any of the DIC buttons
to acknowledge this message and to clear it from
the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
212

ENGINE COOLANT HOT
Notice:If you drive your vehicle while the
engine is overheating, severe engine damage
may occur. If an overheat warning appears
on the instrument panel cluster and/or
DIC, stop the vehicle as soon as possible.
Do not increase the engine speed above
normal idling speed. SeeEngine Overheating
on page 367for more information.
This message displays when the engine coolant
temperature is too hot. The engine coolant
temperature warning light also appears on the
instrument panel cluster. SeeEngine Coolant
Temperature Warning Light on page 188
andEngine Coolant Temperature Gage on
page 189for more information.
To avoid added strain on the engine, turn off the
air conditioner if it is on. When the coolant
temperature returns to normal, the air conditioner
can be turned back on.
This message displays only when the ignition is in
RUN. A chime sounds continuously when this
message is displayed. Press any of the DIC
buttons to acknowledge this message and to clear
it from the screen.This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
HEADLAMPS SUGGESTED
This message displays when the amount of
available light outside of the vehicle is low, or the
windshield wipers have been on for about
30 seconds, and the exterior lamps control is off
or in the parking lamps position. This message
informs the driver that turning on the exterior lamps
is recommended. SeeExterior Lamps on
page 158for more information.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
213

This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
HOOD AJAR
If your vehicle has the remote start feature, this
message displays when the hood is not closed
properly. Make sure that the hood is closed
completely. SeeHood Release on page 349.
This message displays while the ignition is in RUN.
Press any of the DIC buttons to acknowledge
this message and to clear it from the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
HOT TRANS FLUID
This message displays when the transaxle uid in
your vehicle is too hot. Stop the vehicle and
allow it to idle until it cools down. If the warning
message continues to display, have the vehicle
serviced by your dealer as soon as possible.
This message displays and a chime sounds only
while the ignition is in RUN. Press any of the
DIC buttons to acknowledge this message and to
clear it from the screen.
This message continues to display for two seconds
if it has not been acknowledged when the engine is
turned off. It also re-displays for two seconds if the
message has been acknowledged, but the
condition still exists when the engine is turned off.
If the condition still exists, the message re-appears
when the engine is turned on.
214