2008 BUICK LUCERNE air filter

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-6
Horn.............................................................3-6
Tilt Wheel.....................................................3-6
Power Tilt Wheel and Telescopic Steering
Column......................................................3-7
Heated Steering Wheel...................................3-7
Turn Signal/Multifunction Lever.........................3-8
Turn and Lane-Change Signals........................3-8
Headlamp High/Low-Beam Changer..................3-9
Flash-to-Pass.................................................3-9
Windshield Wipers..........................................3-9
Rainsense™ II Wipers...................................3-10
Windshield Washer.......................................3-11
Cruise Control..............................................3-12
Exterior Lamps.............................................3-14
Wiper Activated Headlamps............................3-15
Headlamps on Reminder................................3-16
Daytime Running Lamps (DRL).......................3-16
Fog Lamps..................................................3-17
Cornering Lamps..........................................3-17
Exterior Lighting Battery Saver........................3-17
Instrument Panel Brightness...........................3-17
Courtesy Lamps...........................................3-17Entry Lighting...............................................3-18
Delayed Entry Lighting...................................3-18
Theater Dimming..........................................3-18
Delayed Exit Lighting.....................................3-18
Perimeter Lighting.........................................3-18
Front Reading Lamps....................................3-18
Electric Power Management...........................3-19
Inadvertent Power Battery Saver.....................3-19
Battery Run-Down Protection..........................3-20
Accessory Power Outlet(s)
.............................3-20
Ashtray(s)....................................................3-21
Climate Controls............................................3-21
Climate Control System.................................3-21
Dual Automatic Climate Control System...........3-24
Outlet Adjustment.........................................3-30
Passenger Compartment Air Filter...................3-30
Warning Lights, Gages, and Indicators............3-32
Instrument Panel Cluster................................3-33
Speedometer and Odometer...........................3-34
Trip Odometer..............................................3-34
Tachometer.................................................3-34
Safety Belt Reminders...................................3-34
Airbag Readiness Light..................................3-35
Passenger Airbag Status Indicator...................3-36
Section 3 Instrument Panel
3-1

Operation
(
(Off):Turn the left knob to this position to turn the
climate control system off. Outside air still enters the
vehicle and is directed to the oor. The airow direction
and temperature can be adjusted, as indicated below.
9(Fan):Turn the left knob clockwise or
counterclockwise to increase or decrease the fan speed.
The fan speed is temporarily reduced between the
transition to a new mode. The fan will resume when the
new mode is complete.
If the airow seems low when the fan speed is at the
highest setting, the passenger compartment air lter may
need to be replaced. For more information, see
Passenger Compartment Air Filter on page 3-30and
Scheduled Maintenance on page 6-4.
Temperature Control:Turn the center knob clockwise
or counterclockwise to warm or cool the air coming
through the outlets.
Mode Control:Turn the right knob clockwise or
counterclockwise to change the airow direction.
H(Vent):This mode directs outside air to the
instrument panel outlets.
)(Bi-Level):This mode splits the air between the
instrument panel outlets and the oor outlets. Slightly
cooler air is directed to the instrument panel outlets and
warmer air is directed to the oor outlets.
6(Floor):This mode automatically uses outside air
and directs most to the oor outlets. Some air is directed
toward the side window outlets and to the windshield.
If recirculation is selected while in this mode, it stays on
for three minutes to reduce windshield fogging.
h(Recirculation):Press this button to recirculate
cabin air through the vehicle. An indicator light below the
button comes on to show that this mode is activated.
This mode can be used to prevent outside air and odors
from entering the vehicle or to help cool the air inside
the vehicle more quickly. This mode cannot be selected
while in the defog or defrost modes. If you try to
select the recirculation mode, the indicator light ashes
three times and turns off.
Operation in this mode during periods of high humidity
and cool outside temperatures may result in increased
window fogging. If window fogging is experienced, select
the defrost mode.
3-22

Manual Operation
9(Fan):Turn the left knob either to the left or right to
adjust the fan speed. Turning this control completely
counterclockwise turns on the automatic fan operation.
If the airow seems low when the fan speed is at
the highest setting, the passenger compartment air lter
may need to be replaced. For more information, see
Passenger Compartment Air Filter on page 3-30
andScheduled Maintenance on page 6-4.
9(Off):Turn the left control to this position to turn
the climate control system off. Outside air still enters the
vehicle and is directed to the oor. The airow direction
and temperature can be adjusted, as indicated below.
If the temperature is adjusted while the system is off, the
display will light to show the current settings.
Mode Control:Turn the right knob clockwise or
counterclockwise to change the airow direction.
F(Vent):This mode directs outside air to the
instrument panel outlets.
*(Bi-Level):This mode splits the air between the
instrument panel outlets and the oor outlets. In
automatic operation, cooler air is directed to the upper
outlets and warmer air to the oor outlets.
7(Floor):This mode automatically uses outside air
and directs most to the oor outlets. Some air is directed
toward the side window outlets and to the windshield.
If recirculation is selected while in this mode, it stays on
for three minutes to reduce windshield fogging.
The mode control can also be used to select the
oor/defog mode. Information on defogging and
defrosting can be found later in this section.
#(Air Conditioning):Press the center of the left
control knob to override the automatic system and turn
the air conditioning system on or off. When this
button is pressed, an indicator light below the button
comes on to show that this mode is activated.
The air conditioning system removes moisture from the
air, so a small amount of water might drip underneath
the vehicle while idling or after turning off the engine.
This is normal.
3-26

Outlet Adjustment
Use the levers, located in the middle of the front outlets,
to change the direction of the airow. Use the
thumbwheel located between the outlets to turn them on
and off.
If your vehicle has rear seat outlets, adjust the direction of
the airow using the lever in the center of each outlet.
Operation Tips

Clear away any ice, snow, or leaves from the air
inlets at the base of the windshield that could
block the ow of air into your vehicle.
Use of non-GM approved hood deectors can
adversely affect the performance of the system.
Keep the path under the front seats clear of objects
to help circulate the air inside the vehicle better.
Passenger Compartment Air Filter
Outside air is routed through a passenger compartment
air lter before entering the vehicle. This lter removes
certain particles from the air, including pollen and
dust particles. The lter should be replaced as part of
routine scheduled maintenance. SeeScheduled
Maintenance on page 6-4for when to replace the lter.
The access panel for the passenger compartment air
lter is located under the hood near the windshield,
on the passenger’s side of the vehicle.
3-30

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-4
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of Your
Vehicle......................................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-6
Gasoline Specications....................................5-6
California Fuel...............................................5-6
Additives.......................................................5-7
Fuels in Foreign Countries...............................5-7
Filling the Tank..............................................5-8
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-15
Engine Oil Life System..................................5-18
Engine Air Cleaner/Filter................................5-20
Automatic Transmission Fluid.........................5-21
Engine Coolant.............................................5-24
Radiator Pressure Cap..................................5-28
Coolant Surge Tank Pressure Cap..................5-28
Engine Overheating.......................................5-28Overheated Engine Protection
Operating Mode........................................5-30
Cooling System (3.8L V6 Engine)....................5-30
Cooling System (4.6L V8 Engine)....................5-36
Power Steering Fluid.....................................5-40
Windshield Washer Fluid................................5-41
Brakes........................................................5-42
Battery........................................................5-46
Jump Starting...............................................5-48
Headlamp Aiming...........................................5-53
Bulb Replacement..........................................5-56
Halogen Bulbs..............................................5-56
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps.....................................5-56
Taillamps and Back-Up Lamps.......................5-57
License Plate Lamp......................................5-58
Replacement Bulbs.......................................5-59
Windshield Wiper Blade Replacement..............5-59
Tires..............................................................5-60
Tire Sidewall Labeling...................................5-61
Tire Terminology and Denitions.....................5-64
Ination - Tire Pressure.................................5-67
Tire Pressure Monitor System.........................5-69
Tire Pressure Monitor Operation.....................5-70
Tire Inspection and Rotation...........................5-74
Section 5 Service and Appearance Care
5-1

A. Radiator Pressure Cap. SeeRadiator Pressure Cap
on page 5-28.
B. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-41.
C. Remote Positive (+) Battery Terminal. SeeJump
Starting on page 5-48.
D. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-106.
E. Engine Coolant Recovery Tank. See Index.
F. Power Steering Fluid Reservoir (Out of View). See
Power Steering Fluid on page 5-40.
G. Electric Engine Cooling Fans. See Index.H. Engine Oil Dipstick (Out of View). See “Checking
Engine Oil” underEngine Oil on page 5-15.
I. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-15.
J. Automatic Transmission Fluid Dipstick. See
“Checking the Fluid Level” underAutomatic
Transmission Fluid on page 5-21.
K. Brake Fluid Reservoir. See “Brake Fluid” under
Brakes on page 5-42.
L. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-20.
5-13

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

Engine Air Cleaner/Filter
SeeEngine Compartment Overview on page 5-12for
the location of the engine air cleaner/lter.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/lter at the MaintenanceII
intervals and replace it at the rst oil change after each
50,000 mile (80 000 km) interval. SeeScheduled
Maintenance on page 6-4for more information. If you
are driving in dusty/dirty conditions, inspect the lter
at each engine oil change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/lter, remove the lter from
the vehicle and lightly shake the lter to release
loose dust and dirt. If the lter remains caked with dirt, a
new lter is required.To inspect or replace the lter, do the following:
1. Loosen and remove the two screws on the top of
the engine air cleaner/lter cover.
2. Lift up the outboard side of the cover at an angle
while pulling toward you. This is necessary due to
the two hinges located on the inboard side of
the cover.
3. Remove the engine air cleaner/lter element and
any loose debris that may be found in the air
cleaner base.
4. Inspect or replace the air lter element.
5-20