2007 BUICK LACROSSE cooling

Trunk
{CAUTION:
It can be dangerous to drive with the
trunk lid open because carbon monoxide
(CO) gas can come into your vehicle. You
cannot 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
and select the control setting that will
force outside air into your vehicle. See
Climate Control System.
If you have air outlets on or under
the instrument panel, open them
all the way.
SeeEngine Exhaust on page 122.
Opening the Trunk
To open the trunk from the outside, use the
Remote Keyless Entry (RKE) transmitter. See
Remote Keyless Entry (RKE) System Operation on
page 90for more information.
The ignition must be off, or the transaxle must be
in PARK (P) to open the trunk.
Remote Trunk Release
This feature is used to unlock the trunk from inside
the vehicle using the power door lock switch.
Press and hold the top
of the driver’s or front
passenger’s power door
lock switch to unlock
the trunk.
The vehicle must be in PARK (P) to unlock
the trunk.
100

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, the Driver
Information Center (DIC) message might display
Battery Saver Active. If this message is displayed,
it is recommended that the driver reduce the
electrical loads as much as possible. See
DIC Warnings and Messages on page 208.Battery Run-Down Protection
This helps prevent the vehicle’s battery from
draining in case the interior courtesy lamps,
reading lamps, trunk lamp, underhood lamp, glove
box lamps, or sun visor vanity lamps, if equipped,
are accidently left on. If any of these lamps
are left on while the ignition is off, they will
automatically turn off after 10 minutes. The lamps
will not come back on again until one of the
following occurs:
The ignition is turned on.
The interior lamps control is turned off, then to
door or on.
Ultrasonic Rear Parking
Assist (URPA)
Your vehicle may be equipped with Ultrasonic Rear
Parking Assist (URPA). URPA is designed to help
you park while in REVERSE (R) and operates only
at speeds less than 3 mph (5 km/h). URPA can help
you avoid colliding with objects such as parked
vehicles. The system can detect objects 5 feet
(1.5 m) behind your vehicle and tell you how close
those objects are to your rear bumper.
164

Ashtray(s) and Cigarette Lighter
Your vehicle may have a removable ashtray and
cigarette lighter. The cigarette lighter may be
located under the climate control system.
The removable ashtray can be placed into the
front console cupholder.
Notice:If you put papers, pins, or other
ammable items in the ashtray, hot cigarettes
or other smoking materials could ignite
them and possibly damage your vehicle.
Never put ammable items in the ashtray.
To use the cigarette lighter, push it in all the way,
and let go. When the heating element is ready,
it will pop back out by itself.
Notice:Holding a cigarette lighter in while it is
heating will not allow the lighter to back away
from the heating element when it is hot. Damage
from overheating may occur to the lighter or
heating element, or a fuse could be blown. Do
not hold a cigarette lighter in while it is heating.
Do not use equipment exceeding maximum
amperage rating of 20 amperes.
Climate Controls
Climate Control System
With this system you can control the heating,
cooling and ventilation for your vehicle.
If your vehicle has the remote start feature and
it is activated, the climate control system will
automatically cool the vehicle if the temperature is
greater than 90°F (32°C) and heat the vehicle if the
temperature is below 37°F (3°C). If the temperature
is between 37°F (3°C) and 90°F (32°C), the last
control setting selected when the engine was
running will be used. Normal operation and the last
setting of the climate control system will return after
the key is turned to the RUN position.
168

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear):Press the button to turn the rear
window defogger on or off. An indicator light below
the button will come on to let you know that the
rear window defogger is activated.
The rear window defogger will only work when the
ignition is in RUN. The rear window defogger
will stay on for about 20 minutes after the button is
pressed. If turned on again, the defogger will
only run for about 20 minutes before turning off.
The defogger can also be turned off by pressing
the button again or by turning off the engine.
Do not drive the vehicle until all windows are clear.
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.
Dual Automatic Climate Control
System
With this system you can control the heating,
cooling, and ventilation for the vehicle.
172

The TCS warning light will come on briey when
you turn the ignition to RUN. If it does not come on
then, have it xed so it will be ready to warn
you if there is a problem.
If the TCS warning light stays on or comes on
while you are driving, pull off the road as soon as
possible and stop carefully. Try resetting the
system by turning the ignition off then back on. If
the light still stays on or comes back on again
while you are driving, your vehicle needs service.
Have the traction control system and, if your
vehicle has this feature, the StabiliTrak
®system
inspected as soon as possible. SeeTraction
Control System (TCS) on page 294and
StabiliTrak
®System on page 296for more
information.
Engine Coolant Temperature
Warning Light
This light tells you that
your engine is very hot.
This light will come on when you rst start the
vehicle as a check to let you know that the light is
working. It will go out after a few seconds. If the
light does not come on, the bulb may be burned out.
See your dealer to have it corrected.
If the light does not go out or if the light comes on
and stays on while you are driving, your vehicle
may have a problem with the cooling system. You
should stop the vehicle and turn off the engine
as soon as possible to avoid damage to the
engine. A warning chime will sound when this light
is on, also.
SeeEngine Overheating on page 367.
188

Hill and Mountain Roads
Driving on steep hills or mountains is different
from driving in at or rolling terrain.If you drive regularly in steep country, or if you are
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 uid levels and also the brakes, tires,
cooling system, and transaxle. These parts
can work hard on mountain roads.
{CAUTION:
If you do not shift down, your brakes
could get so hot that they would not 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.
312

When You Are Ready to Leave After
Parking on a Hill
1. Apply the regular brakes and hold the pedal
down while you:
Start the engine.
Shift into a gear.
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
The vehicle will need service more often when it
pulls a trailer. SeeScheduled Maintenance
on page 462for more information. Things that are
especially important in trailer operation are
automatic transaxle uid; which should not be
overlled; engine oil, drive belt(s), and cooling and
brake systems. Each of these is covered in this
manual, and the Index will help you nd them
quickly. If trailering, it is a good idea to review this
information before starting on a trip.
Check periodically to see that all hitch nuts and
bolts are tight.
Engine Cooling When Trailer Towing
The cooling system may temporarily overheat
during severe operating conditions. SeeEngine
Overheating on page 367.
335

Service........................................................ 340
Accessories and Modications................... 341
California Proposition 65 Warning.............. 341
Doing Your Own Service Work.................. 342
Adding Equipment to the Outside
of Your Vehicle...................................... 343
Fuel............................................................. 343
Gasoline Octane........................................ 343
Gasoline Specications.............................. 344
California Fuel........................................... 344
Additives................................................... 344
Fuels in Foreign Countries........................ 345
Filling the Tank......................................... 346
Filling a Portable Fuel Container............... 348
Checking Things Under the Hood.............. 348
Hood Release........................................... 349
Engine Compartment Overview.................. 350
Engine Oil................................................. 353
Engine Oil Life System.............................. 356
Engine Air Cleaner/Filter............................ 358
Automatic Transaxle Fluid......................... 360Engine Coolant.......................................... 363
Radiator Pressure Cap.............................. 367
Engine Overheating................................... 367
Overheated Engine Protection
Operating Mode..................................... 370
Cooling System......................................... 370
Power Steering Fluid ................................. 378
Windshield Washer Fluid........................... 380
Brakes...................................................... 381
Battery...................................................... 384
Jump Starting............................................ 385
Headlamp Aiming........................................ 391
Bulb Replacement....................................... 394
Halogen Bulbs........................................... 394
Headlamps and Sidemarker Lamps........... 395
Front Turn Signal and Parking Lamps....... 397
Taillamps, Turn Signal, Sidemarker,
Stoplamps and Back-up Lamps.............. 398
License Plate Lamp................................... 400
Replacement Bulbs................................... 400
Windshield Replacement............................ 401
Section 5 Service and Appearance Care
337