2008 BUICK LUCERNE fuel cap

A. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-106.
B. Remote Positive (+) Terminal. SeeJump Starting on
page 5-48.
C. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-41.
D. Engine Coolant Surge Tank and Pressure Cap See
Coolant Surge Tank Pressure Cap on page 5-28
andCooling System (3.8L V6 Engine) on page 5-30
orCooling System (4.6L V8 Engine) on page 5-36.
E. Remote Negative (−) Terminal. SeeJump Starting on
page 5-48.
F. Power Steering Fluid. SeePower Steering Fluid on
page 5-40.
G. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-15.
H. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 5-15.
I. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-42.
J. Automatic Transmission Fluid Cap and Dipstick (Out
of View). SeeAutomatic Transmission Fluid on
page 5-21.
K. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-20.Engine Oil
Checking Engine Oil
It is a good idea to check the engine oil every time you
get fuel. In order to get an accurate reading, the oil
must be warm and the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop. See
Engine Compartment Overview on page 5-12for
the location of the engine oil dipstick.
1. Turn off the engine and give the oil several minutes
to drain back into the oil pan. If you do not do this,
the oil dipstick might not show the actual level.
2. Pull out the dipstick and clean it with a paper towel
or cloth, then push it back in all the way. Remove it
again, keeping the tip down, and check the level.
5-15

Cold Tire Pressure:The amount of air pressure
in a tire, measured in pounds per square inch
(psi) or kilopascals (kPa) before a tire has built up
heat from driving. SeeInflation - Tire Pressure
on page 5-67.
Curb Weight
:The weight of a motor vehicle with
standard and optional equipment including the
maximum capacity of fuel, oil, and coolant,
but without passengers and cargo.
DOT Markings
:A code molded into the sidewall
of a tire signifying that the tire is in compliance
with the U.S. Department of Transportation (DOT)
motor vehicle safety standards. The DOT code
includes the Tire Identication Number (TIN),
an alphanumeric designator which can also identify
the tire manufacturer, production plant, brand,
and date of production.
GVWR
:Gross Vehicle Weight Rating. See
Loading Your Vehicle on page 4-19.
GAWR FRT
:Gross Axle Weight Rating for the
front axle. SeeLoading Your Vehicle on
page 4-19.
GAWR RR
:Gross Axle Weight Rating for the rear
axle. SeeLoading Your Vehicle on page 4-19.Intended Outboard Sidewall
:The side of an
asymmetrical tire, that must always face outward
when mounted on a vehicle.
Kilopascal (kPa)
:The metric unit for air pressure.
Light Truck (LT-Metric) Tire
:A tire used on
light duty trucks and some multipurpose passenger
vehicles.
Load Index
:An assigned number ranging from
1 to 279 that corresponds to the load carrying
capacity of a tire.
Maximum Ination Pressure
:The maximum air
pressure to which a cold tire can be inated.
The maximum air pressure is molded onto the
sidewall.
Maximum Load Rating
:The load rating for a tire
at the maximum permissible ination pressure
for that tire.
Maximum Loaded Vehicle Weight
:The sum of
curb weight, accessory weight, vehicle capacity
weight, and production options weight.
Normal Occupant Weight
:The number of
occupants a vehicle is designed to seat multiplied
by 150 lbs (68 kg). SeeLoading Your Vehicle
on page 4-19.
5-65

Vehicle Maximum Load on the Tire:Load on an
individual tire due to curb weight, accessory
weight, occupant weight, and cargo weight.
Vehicle Placard
:A label permanently attached to
a vehicle showing the vehicle’s capacity weight
and the original equipment tire size and
recommended ination pressure. See “Tire and
Loading Information Label” underLoading
Your Vehicle on page 4-19.
Ination - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-ination or over-ination is all right. It is
not. If your tires do not have enough air
(under-ination), you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economyIf your tires have too much air (over-ination),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazards
A vehicle specic Tire and Loading Information
label is attached to your vehicle. This label shows
your vehicle’s original equipment tires and the
correct ination pressures for your tires when they
are cold. The recommended cold tire ination
pressure, shown on the label, is the minimum
amount of air pressure needed to support
your vehicle’s maximum load carrying capacity.
For additional information regarding how much
weight your vehicle can carry, and an example of
the Tire and Loading Information label, see
Loading Your Vehicle on page 4-19. How you load
your vehicle affects vehicle handling and ride
comfort. Never load your vehicle with more weight
than it was designed to carry.
5-67

ApplicationCapacities
English Metric
Fuel Tank
3.8L Engine (with NU6 emissions) sold new in CA, ME, VT,
NY, MA (see your dealer/retailer for bordering states)18.0 gal 68.1 L
3.8L Engine (without NU6 emissions) sold new in all other
states (see your dealer/retailer for more information)18.5 gal 70.0 L
4.6L Engines sold new in all states 18.5 gal 70.0 L
Wheel Nut Torque 100 lb ft 140Y
All capacities are approximate. When adding, be sure to ll to the appropriate level, as recommended in this
manual. Recheck uid level after lling.
Engine Specications
Engine VIN Code Transmission Spark Plug Gap
3.8L V6 2 Automatic 0.060 in (1.52 mm)
4.6L V8 SUPER with High
Output DOHC9 Automatic 0.050 in (1.27 mm)
4.6L V8 with DOHC Y Automatic 0.050 in (1.27 mm)
5-114

Audio System(s).............................................3-78
Automatic Transmission
Fluid..........................................................5-21
Operation...................................................2-25
B
Backglass Antenna..........................................3-97
Battery..........................................................5-46
Electric Power Management..........................3-19
Exterior Lighting Battery Saver......................3-17
Inadvertent Power Saver..............................3-19
Run-Down Protection...................................3-20
Brake
Emergencies................................................ 4-5
Brakes..........................................................5-42
Panic Assist................................................. 4-7
System Warning Light..................................3-39
Braking........................................................... 4-3
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-20
Bulb Replacement...........................................5-56
Halogen Bulbs............................................5-56
Headlamp Aiming........................................5-53
License Plate Lamps....................................5-58
Replacement Bulbs......................................5-59
Taillamps and Back-Up Lamps.......................5-57
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps...................................5-56
Buying New Tires...........................................5-76
C
Calibration.............................1-11, 2-34, 2-36, 3-54
California Fuel.................................................. 5-6
California Perchlorate Materials Requirements....... 5-4
California Proposition 65 Warning....................... 5-4
Canadian Owners................................................ ii
Capacities and Specications..........................5-113
Carbon Monoxide...................2-13, 2-32, 4-15, 4-26
Care of
Safety Belts................................................5-97
CD, MP3 .......................................................3-89
Center Console Storage Area...........................2-56
Center Flex Storage Unit.................................2-57
Center Seat...................................................1-11
Chains, Tire...................................................5-82
Charging System Light....................................3-38
Check
Engine Light...............................................3-44
Checking Things Under the Hood......................5-10
Chemical Paint Spotting.................................5-102
Child Restraints
Child Restraint Systems...............................1-40
Infants and Young Children...........................1-36
Lower Anchors and Tethers for Children..........1-43
Older Children.............................................1-33
Securing a Child Restraint in a Rear Seat
Position..................................................1-50
2