2005 BUICK LESABRE cooling

150,000 Miles (240 000 km)
❑Drain, ush and rell cooling system (or every
60 months since last service, whichever occurs rst).
SeeEngine Coolant on page 5-24for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test cooling system and
pressure cap.An Emission Control Service.
❑Inspect engine accessory drive belt.An Emission
Control Service.
Long Trip/Highway Scheduled
Maintenance
The services shown in this schedule up to 100,000 miles
(166 000 km) should be repeated after 100,000 miles
(166 000 km) at the same intervals for the life of
this vehicle. The services shown at 150,000 miles
(240 000 km) should be repeated at the same interval
after 150,000 miles (240 000 km) for the life of this
vehicle.
SeePart B: Owner Checks and Services on page 6-18
andPart C: Periodic Maintenance Inspections on
page 6-22.
Footnotes
†The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
*If your vehicle has the GM Oil Life System, a computer
system lets you know when to change the engine oil
and lter. This is based on engine revolutions and
engine temperature, and not on mileage. Based
on driving conditions, the mileage at which an oil change
will be indicated can vary considerably. For the oil life
system to work properly, you must reset the system
every time the oil is changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE ENGINE OIL SOON message
will come on. Change your oil as soon as possible within
the next two times you stop for fuel. See Engine Oil
on page 5-13.It is possible that, if you are driving under
the best conditions, the oil life system may not indicate
that an oil change is necessary for over a year.
6-13

82,500 Miles (137 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service. (See footnote *.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-63for proper rotation pattern and additional
information.(See footnote @.) (See footnote +.)
90,000 Miles (150 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service. (See footnote *.)
❑Replace engine air cleaner lter. SeeEngine Air
Cleaner/Filter on page 5-18for more information.
An Emission Control Service.
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-63for proper rotation pattern and additional
information.(See footnote @.) (See footnote +.)
97,500 Miles (162 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service. (See footnote *.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-63for proper rotation pattern and additional
information.(See footnote @.) (See footnote +.)
100,000 Miles (166 000 km)
❑Inspect spark plug wires.An Emission
Control Service.
❑Replace spark plugs.An Emission Control Service.
❑Change automatic transaxle uid and lter if the
vehicle is mainly driven under one or more of
these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C)
or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or
delivery service.
❑If you have not used your vehicle under severe
service conditions listed previously and, therefore,
have not changed your automatic transaxle uid,
change both the uid and lter
150,000 Miles (240 000 km)
❑Drain, ush and rell cooling system (or every
60 months since last service, whichever occurs rst).
SeeEngine Coolant on page 5-24for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
❑Inspect engine accessory drive belt.An Emission
Control Service.
6-17

Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
ttings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of
the cooling system and pressure cap is recommended
at least once a year.
Throttle System Inspection
Inspect the throttle system for interference or binding,
and for damaged or missing parts. Replace parts
as needed. Replace any components that have high
effort or excessive wear. Do not lubricate accelerator
and cruise control cables.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook-up, binding, leaks, cracks,
chang, etc. Inspect disc brake pads for wear and rotors
for surface condition. Inspect other brake parts,
including calipers, parking brake, etc. You may need to
have your brakes inspected more often if your driving
habits or conditions result in frequent braking.
6-23

Child Restraints
Child Restraint Systems...............................1-34
Infants and Young Children...........................1-31
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-40
Older Children.............................................1-28
Securing a Child Restraint Designed for
the LATCH System...................................1-42
Securing a Child Restraint in a Rear
Seat Position...........................................1-42
Securing a Child Restraint in the Center
Front Seat Position...................................1-44
Securing a Child Restraint in the Right
Front Seat Position...................................1-45
Top Strap...................................................1-38
Top Strap Anchor Location............................1-39
Where to Put the Restraint...........................1-37
Chime Level Adjustment..................................3-85
Cigarette Lighter.............................................3-23
Cleaning
Aluminum or Chrome-Plated Wheels..............5-84
Exterior Lamps/Lenses.................................5-83
Fabric/Carpet..............................................5-79
Finish Care.................................................5-83
Glass Surfaces............................................5-81
Instrument Panel.........................................5-81
Interior Plastic Components...........................5-81
Leather......................................................5-81
Tires..........................................................5-84
Underbody Maintenance...............................5-85Cleaning (cont.)
Vinyl..........................................................5-81
Washing Your Vehicle...................................5-82
Weatherstrips..............................................5-82
Windshield and Wiper Blades........................5-83
Climate Control System...................................3-24
Climate Controls Personalization....................3-32
Dual Automatic............................................3-27
Outlet Adjustment........................................3-31
Steering Wheel Controls...............................3-31
Comfort Guides, Rear Safety Belt.....................1-25
Compact Spare Tire........................................5-78
Content Theft-Deterrent....................................2-18
Control of a Vehicle.......................................... 4-5
Convenience Net............................................2-43
Coolant
Engine Temperature Gage............................3-41
Heater, Engine............................................2-24
Cooling System..............................................5-28
Cornering Lamps............................................3-15
Courtesy Lamps.............................................3-17
Cruise Control Lever.......................................3-11
Cruise Control Light........................................3-45
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text
Telephone (TTY) Users............................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-5
3

Engine (cont.)
Coolant......................................................5-24
Coolant Heater............................................2-24
Coolant Temperature Gage...........................3-41
Cooling System Inspection............................6-23
Engine Compartment Overview......................5-12
Exhaust.....................................................2-31
Oil .............................................................5-13
Overheating................................................5-26
Starting......................................................2-23
Entry Lighting.................................................3-18
Event Data Recorders (EDR)............................. 7-9
Extender, Safety Belt.......................................1-27
Exterior Lamps...............................................3-14
Exterior Lighting Battery Saver..........................3-17
F
Filter
Engine Air Cleaner......................................5-18
Finish Damage...............................................5-85
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-69
Flat Tire, Changing.........................................5-70
Flat Tire, Storing.............................................5-77
Fluid
Automatic Transaxle.....................................5-21
Power Steering...........................................5-34Fluid (cont.)
Windshield Washer......................................5-34
Front Reading Lamps......................................3-19
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-7
Fuels in Foreign Countries.............................. 5-7
Gage.........................................................3-46
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-6
System Inspection.......................................6-23
Fuses
Engine Compartment Fuse Block...................5-89
Fuses and Circuit Breakers...........................5-88
Rear Underseat Fuse Block..........................5-91G
Gage
Engine Coolant Temperature.........................3-41
Fuel..........................................................3-46
Speedometer..............................................3-36
Tachometer.................................................3-36
Garage Door Opener.......................................2-38
5

Gasoline
Octane........................................................ 5-5
Specications............................................... 5-6
Glove Box.....................................................2-43
GM Mobility Reimbursement Program.................. 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-7
Headlamp
Aiming.......................................................5-45
Horizontal Aiming.........................................5-46
Vertical Aiming............................................5-47
Headlamps....................................................5-49
Bulb Replacement.......................................5-48
Daytime Running Lamps...............................3-15
Flash-to-Pass............................................... 3-8
Front Turn Signal Lamps..............................5-50
Halogen Bulbs............................................5-48
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-14
Wiper Activated...........................................3-14
Head-Up Display (HUD)...................................3-20
Heated Seats................................................... 1-4
Heater...........................................................3-24
Heater...........................................................3-27Highbeam On Light.........................................3-45
Highway Hypnosis...........................................4-23
Hill and Mountain Roads..................................4-24
HomeLink
®Transmitter....................................2-38
HomeLink®Transmitter, Programming................2-39
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-6
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-13
I
Ignition Positions.............................................2-22
Inadvertent Power Battery Saver.......................3-20
Infants and Young Children, Restraints...............1-31
Ination -- Tire Pressure..................................5-60
Inspection
Brake System.............................................6-23
Engine Cooling System................................6-23
Exhaust System..........................................6-22
Fuel System...............................................6-23
Part C - Periodic Maintenance.......................6-22
Steering, Suspension and Front Drive Axle
Boot and Seal.........................................6-22
Throttle System...........................................6-23
6

Locks
Central Door Unlocking System.....................2-11
Delayed Locking..........................................2-11
Door..........................................................2-10
Lockout Protection.......................................2-14
Power Door................................................2-11
Programmable Automatic Door Locks.............2-12
Rear Door Security Locks.............................2-13
Long Trip/Highway Scheduled Maintenance........6-13
Loss of Control...............................................4-14
Lumbar
Manual Controls............................................ 1-3
Power Controls............................................. 1-3
M
Maintenance, Normal Replacement Parts............5-97
Maintenance Schedule
At Each Fuel Fill.........................................6-18
At Least Once a Month................................6-18
At Least Once a Year..................................6-19
At Least Twice a Year..................................6-19
Brake System Inspection..............................6-23
Engine Cooling System Inspection.................6-23
Exhaust System Inspection...........................6-22
Fuel System Inspection................................6-23
How This Section is Organized....................... 6-3
Introduction.................................................. 6-2Maintenance Schedule (cont.)
Long Trip/Highway Scheduled Maintenance.....6-13
Maintenance Requirements............................. 6-2
Part A - Scheduled Maintenance Services......... 6-4
Part B - Owner Checks and Services.............6-18
Part C - Periodic Maintenance Inspections......6-22
Part D - Recommended Fluids
and Lubricants.........................................6-24
Part E - Maintenance Record........................6-25
Selecting the Right Schedule.......................... 6-5
Short Trip/City Scheduled Maintenance............. 6-6
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection..........................6-22
Throttle System Inspection............................6-23
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Light................................3-41
Manual Lumbar Controls.................................... 1-3
Manual Seats................................................... 1-2
Memory Mirrors..............................................2-45
Memory Seat.................................................2-45
Message
DIC Warnings and Messages........................3-50
Mirrors
Automatic Dimming Rearview........................2-32
Automatic Dimming Rearview with Compass....2-33
Manual Rearview Mirror................................2-32
Memory.....................................................2-45
Outside Automatic Dimming Heated Mirror......2-36
8