2007 BUICK LUCERNE Owner's Manual

Driving On Grades
Reduce speed and shift to a lower gearbefore
you start down a long or steep downgrade. If you
do not shift down, you might have to use your
brakes so much that they would get hot and
no longer work well.
On a long uphill grade, shift down to THIRD (3)
and reduce your speed to around 45 mph
(70 km/h) to reduce the possibility of engine and
transaxle overheating.
Parking on Hills
{CAUTION:
You really should not park your
vehicle, with a trailer attached, on a hill.
If something goes wrong, your rig could
start to move. People can be injured, and
both your vehicle and the trailer can be
damaged.But if you ever have to park your rig on a hill, here
is how to do it:
1. Apply your regular brakes, but do not shift into
PARK (P) yet.
2. Have someone place chocks under the trailer
wheels.
3. When the wheel chocks are in place, release
the regular brakes until the chocks absorb
the load.
4. Reapply the regular brakes. Then apply your
parking brake, and then shift to PARK (P).
5. Release the regular brakes.
321

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal
down while you:
Start your 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
Your vehicle will need service more often when
you’re pulling a trailer. See the Maintenance
Schedule for more on this. Things that are
especially important in trailer operation are
automatic transaxle uid (don’t overll), engine oil,
drive belt, cooling system and brake system.
Each of these is covered in this manual, and the
Index will help you nd them quickly. If you’re
trailering, it’s a good idea to review this information
before you start your trip.
Check periodically to see that all hitch nuts and
bolts are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat
during severe operating conditions. SeeEngine
Overheating on page 351.
322

Service........................................................ 325
Accessories and Modications................... 325
California Proposition 65 Warning.............. 326
Doing Your Own Service Work.................. 326
Adding Equipment to the Outside of
Your Vehicle.......................................... 327
Fuel............................................................. 327
Gasoline Octane........................................ 327
Gasoline Specications.............................. 328
California Fuel........................................... 328
Additives................................................... 328
Fuels in Foreign Countries........................ 329
Filling the Tank......................................... 330
Filling a Portable Fuel Container............... 332
Checking Things Under the Hood.............. 332
Hood Release........................................... 333
Engine Compartment Overview.................. 334
Engine Oil................................................. 337
Engine Oil Life System.............................. 340
Engine Air Cleaner/Filter............................ 342
Automatic Transaxle Fluid......................... 343
Engine Coolant.......................................... 347
Radiator Pressure Cap.............................. 351
Engine Overheating................................... 351Overheated Engine Protection
Operating Mode..................................... 353
Cooling System (3.8L V6 Engine).............. 354
Cooling System (4.6L V8 Engine).............. 360
Power Steering Fluid ................................. 364
Windshield Washer Fluid........................... 365
Brakes...................................................... 367
Battery...................................................... 370
Jump Starting............................................ 372
Headlamp Aiming........................................ 377
Bulb Replacement....................................... 380
Halogen Bulbs........................................... 380
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps ................................. 380
Taillamps and Back-Up Lamps.................. 382
License Plate Lamp................................... 383
Replacement Bulbs................................... 383
Windshield Wiper Blade Replacement....... 383
Tires............................................................ 385
Tire Sidewall Labeling............................... 386
Tire Terminology and Denitions............... 389
Ination - Tire Pressure............................. 392
Tire Pressure Monitor System................... 393
Section 5 Service and Appearance Care
323

Tire Inspection and Rotation...................... 398
When It Is Time for New Tires.................. 400
Buying New Tires...................................... 400
Different Size Tires and Wheels................ 402
Uniform Tire Quality Grading..................... 402
Wheel Alignment and Tire Balance............ 404
Wheel Replacement.................................. 404
Tire Chains............................................... 406
If a Tire Goes Flat.................................... 407
Changing a Flat Tire................................. 408
Removing the Spare Tire and Tools.......... 409
Removing the Flat Tire and
Installing the Spare Tire......................... 410
Storing a Flat or Spare Tire and Tools...... 416
Compact Spare Tire.................................. 418
Appearance Care........................................ 418
Cleaning the Inside of Your Vehicle.......... 418
Fabric/Carpet............................................. 420
Leather...................................................... 421
Instrument Panel, Vinyl, and
Other Plastic Surfaces........................... 421
Care of Safety Belts.................................. 422
Weatherstrips............................................ 422Washing Your Vehicle............................... 422
Cleaning Exterior Lamps/Lenses................ 422
Finish Care............................................... 423
Windshield and Wiper Blades.................... 423
Aluminum or Chrome-Plated Wheels......... 424
Tires......................................................... 424
Sheet Metal Damage................................. 425
Finish Damage.......................................... 425
Underbody Maintenance............................ 425
Chemical Paint Spotting............................ 425
Vehicle Care/Appearance Materials............ 426
Vehicle Identication.................................. 427
Vehicle Identication Number (VIN)........... 427
Service Parts Identication Label............... 427
Electrical System........................................ 428
Add-On Electrical Equipment..................... 428
Power Windows and Other Power
Options.................................................. 428
Fuses and Circuit Breakers....................... 428
Underhood Fuse Block.............................. 428
Rear Underseat Fuse Block....................... 431
Capacities and Specications.................... 436
Section 5 Service and Appearance Care
324

Service
Your dealer knows your vehicle best and wants
you to be happy with it. We hope you will go
to your dealer for all your service needs. You will
get genuine GM parts and GM-trained and
supported service people.
We hope you will want to keep your GM
vehicle all GM. Genuine GM parts have
one of these marks:
Accessories and Modications
When you add non-GM accessories to your vehicle
they can affect your vehicle’s performance and
safety, including such things as, airbags, braking,
stability, ride and handling, emissions systems,
aerodynamics, durability, and electronic systems
like anti-lock brakes, traction control and stability
control. Some of these accessories may even
cause malfunction or damage not covered by
warranty.
GM Accessories are designed to complement and
function with other systems on your vehicle.
Your GM dealer can accessorize your vehicle
using genuine GM Accessories. When you go to
your GM dealer and ask for GM Accessories,
you will know that GM-trained and supported
service technicians will perform the work using
genuine GM Accessories.
325

California Proposition 65 Warning
Most motor vehicles, including this one, contain
and/or emit chemicals known to the State of
California to cause cancer and birth defects or other
reproductive harm. Engine exhaust, many parts and
systems (including some inside the vehicle), many
uids, and some component wear by-products
contain and/or emit these chemicals.
Doing Your Own Service Work
{CAUTION:
You can be injured and your vehicle could
be damaged if you try to do service work
on a vehicle without knowing enough
about it.
Be sure you have sufficient knowledge,
experience, the proper replacement
parts, and tools before you attempt any
vehicle maintenance task.
CAUTION: (Continued)
CAUTION: (Continued)

Be sure to use the proper nuts, bolts,
and other fasteners. English and
metric fasteners can be easily
confused. If you use the wrong
fasteners, parts can later break or fall
off. You could be hurt.
If you want to do some of your own service work,
you will want to use the proper service manual.
It tells you much more about how to service your
vehicle than this manual can. To order the
proper service manual, seeService Publications
Ordering Information on page 478.
Your vehicle has an airbag system. Before
attempting to do your own service work, see
Servicing Your Airbag-Equipped Vehicle on
page 86.
You should keep a record with all parts receipts
and list the mileage and the date of any service
work you perform. SeeMaintenance Record
on page 455.
326

Adding Equipment to the Outside of
Your Vehicle
Things you might add to the outside of your
vehicle can affect the airow around it. This may
cause wind noise and affect windshield washer
performance. Check with your dealer before
adding equipment to the outside of your vehicle.
Fuel
Use of the recommended fuel is an important part
of the proper maintenance of your vehicle. To
help keep your engine clean and maintain optimum
vehicle performance, GM recommends the use
of gasoline advertised as TOP TIER Detergent
Gasoline.
The 8th digit of your Vehicle Identication Number
(VIN) shows the code letter or number that
identies your engine. You will nd the VIN at the
top left of the instrument panel. SeeVehicle
Identication Number (VIN) on page 427.
Gasoline Octane
If your vehicle has the 3.8L V6 engine (VIN
Code 2), use regular unleaded gasoline with a
posted octane rating of 87 or higher. If the octane
rating is less than 87, you may notice an audible
knocking noise when you drive, commonly referred
to as spark knock. If this occurs, use a gasoline
rated at 87 octane or higher as soon as possible.
If you are using gasoline rated at 87 octane or
higher and you hear heavy knocking, your engine
needs service.
If your vehicle has the 4.6L V8 engine (VIN
Code Y), use premium unleaded gasoline with a
posted octane rating of 91 or higher. You may also
use regular unleaded gasoline rated at 87 octane
or higher, but your vehicle’s acceleration may
be slightly reduced, and you may notice a slight
audible knocking noise, commonly referred to
as spark knock. If the octane is less than 87, you
may notice a heavy knocking noise when you
drive. If this occurs, use a gasoline rated at
87 octane or higher as soon as possible.
Otherwise, you might damage your engine. If you
are using gasoline rated at 87 octane or higher
and you hear heavy knocking, your engine needs
service.
327

Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 328for additional information.
California Fuel
If your vehicle is certied to meet California
Emissions Standards, it is designed to operate on
fuels that meet California specications. See
the underhood emission control label. If this fuel is
not available in states adopting California
emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control system
performance may be affected. The malfunction
indicator lamp may turn on and your vehicle may
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 206. If this occurs, return to
your authorized GM dealer for diagnosis.If it is determined that the condition is caused by
the type of fuel used, repairs may not be
covered by your warranty.
Additives
To provide cleaner air, all gasolines in the United
States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your fuel.
However, some gasolines contain only the
minimum amount of additive required to meet
U.S. Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves
clean, or if your vehicle experiences problems due
to dirty injectors or valves, look for gasoline that
is advertised as TOP TIER Detergent Gasoline.
Also, your dealer has additives that will help
correct and prevent most deposit-related problems.
328