ECU BUICK LUCERNE 2009 Workshop Manual

To reinstall the rear seat cushion, do the following:
{CAUTION:
A safety belt that is not properly routed through the
seat cushion or is twisted will not provide the
protection needed in a crash. If the safety belt has
not been routed through the seat cushion at all, it
will not be there to work for the next passenger. The
person sitting in that position could be badly injured.
After reinstalling the seat cushion, always check to
be sure that the safety belts are properly routed and
are not twisted.
1. Buckle the center passenger position safety belt,
then route the safety belts through the proper slots
in the seat cushion. Do not let the safety belts get
twisted.
2. Slide the rear of the cushion up and under the
seatback so the rear-locating guides hook into the
wire loops on the back frame.
3. With the seat cushion lowered, push rearward and
then press down on the seat cushion until the spring
locks on both ends engage.
4. Check to make sure the safety belts are properly
routed and that no portion of any safety belt is
trapped under the seat. Also make sure the seat
cushion is secured.
5-105

At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by the vehicle
warranty.
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-17.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
(4.6L Engine) on page 5-28orEngine Coolant
(3.9L Engine) on page 5-32.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer uid reservoir and add the proper uid if
necessary.
At Least Once a Month
Tire Ination Check
Inspect the vehicle’s tires and make sure they are
inated to the correct pressures. Do not forget to check
the spare tire. SeeInflation - Tire Pressure on page 5-66.
Check to make sure the spare tire is stored securely.
SeeChanging a Flat Tire on page 5-82.
Tire Wear Inspection
Tire rotation may be required for high mileage highway
drivers prior to the Engine Oil Life System service
notication. Check the tires for wear and, if necessary,
rotate the tires. SeeTire Inspection and Rotation on
page 5-72.
6-9

Coverage
Services are provided up to 5 years/100,000 miles
(160 000 km), whichever comes rst.
In the U.S., anyone driving the vehicle is covered.
In Canada, a person driving the vehicle without
permission from the owner is not covered.
Roadside Assistance is not a part of the New Vehicle
Limited Warranty. Buick and General Motors of Canada
Limited reserve the right to make any changes or
discontinue the Roadside Assistance program at any
time without notication.
Buick and General Motors of Canada Limited reserve
the right to limit services or payment to an owner
or driver if they decide the claims are made too often,
or the same type of claim is made many times.
Services Provided
Emergency Fuel Delivery:Delivery of enough fuel
for the vehicle to get to the nearest service station.
Lock-Out Service:Service is provided to unlock
the vehicle if you are locked out. A remote unlock
may be available if you have OnStar
®. For security
reasons, the driver must present identication
before this service is given.
Emergency Tow From a Public Road or
Highway:Tow to the nearest Buick dealer for
warranty service, or if the vehicle was in a crash
and cannot be driven. Assistance is also given when
the vehicle is stuck in sand, mud, or snow.
Flat Tire Change:Service is provided to change a
at tire with the spare tire. The spare tire, if equipped,
must be in good condition and properly inated.
It is the owner’s responsibility for the repair or
replacement of the tire if it is not covered by the
warranty.
Battery Jump Start:Service is provided to jump
start a dead battery.
Trip Interruption Benets and Assistance:If your
trip is interrupted due to a warranty failure, incidental
expenses may be reimbursed during the 5 years/
100,000 miles (160 000 km) Powertrain warranty
period. Items considered are hotel, meals, and
rental car.
7-8

To read data recorded by an EDR, special equipment
is required, and access to the vehicle or the EDR
is needed. In addition to the vehicle manufacturer,
other parties, such as law enforcement, that have the
special equipment, can read the information if they
have access to the vehicle or the EDR.
GM will not access this data or share it with others
except: with the consent of the vehicle owner or, if the
vehicle is leased, with the consent of the lessee; in
response to an official request of police or similar
government office; as part of GM’s defense of litigation
through the discovery process; or, as required by law.
Data that GM collects or receives may also be used for
GM research needs or may be made available to others
for research purposes, where a need is shown and the
data is not tied to a specic vehicle or vehicle owner.
OnStar®
If your vehicle has OnStar and you subscribe to the
OnStar services, please refer to the OnStar Terms
and Conditions for information on data collection
and use. See alsoOnStar
®System on page 2-46
in this manual for more information.
Navigation System
If your vehicle has a navigation system, use of the
system may result in the storage of destinations,
addresses, telephone numbers, and other trip
information. Refer to the navigation system operating
manual for information on stored data and for deletion
instructions.
Radio Frequency
Identication (RFID)
RFID technology is used in some vehicles for functions
such as tire pressure monitoring and ignition system
security, as well as in connection with conveniences
such as key fobs for remote door locking/unlocking
and starting, and in-vehicle transmitters for garage door
openers. RFID technology in GM vehicles does not
use or record personal information or link with any
other GM system containing personal information.
7-18

Checking Things Under the Hood......................5-12
Chemical Paint Spotting...................................5-99
Child Restraints
Child Restraint Systems...............................1-41
Infants and Young Children...........................1-38
Lower Anchors and Tethers for Children..........1-45
Older Children.............................................1-35
Securing a Child Restraint in a
Rear Seat Position...................................1-51
Securing a Child Restraint in the
Center Front Seat Position........................1-54
Securing a Child Restraint in the
Right Front Seat Position..........................1-54
Where to Put the Restraint...........................1-44
Cleaning
Aluminum or Chrome-Plated Wheels..............5-98
Exterior Lamps/Lenses.................................5-96
Fabric/Carpet..............................................5-93
Finish Care.................................................5-96
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-95
Interior.......................................................5-92
Leather......................................................5-94
Tires..........................................................5-99
Underbody Maintenance...............................5-99
Washing Your Vehicle...................................5-96
Weatherstrips..............................................5-95
Windshield and Wiper Blades........................5-97Climate Control System...................................3-21
Air Filter, Passenger Compartment.................3-30
Dual Automatic............................................3-24
Outlet Adjustment........................................3-30
Clock, Setting.................................................3-76
Collision Damage Repair..................................7-12
Compact Spare Tire........................................5-91
Compass.......................................1-12, 2-34, 3-54
Content Theft-Deterrent....................................2-17
Control of a Vehicle.......................................... 4-3
Convenience Net............................................2-57
Coolant
Engine...............................................5-28, 5-32
Engine Temperature Gage............................3-42
Engine Temperature Warning Light.................3-42
Surge Tank Pressure Cap.............................5-35
Cooled Seats................................................... 1-7
Cooling System..............................................5-26
Cornering Lamps............................................3-17
Courtesy Lamps.............................................3-18
Cruise Control................................................3-12
Cruise Control Light........................................3-47
Cupholders....................................................2-57
Customer Assistance Information
Courtesy Transportation................................7-10
Customer Assistance for
Text Telephone (TTY) Users........................ 7-6
Customer Assistance Offices........................... 7-6
3

Customer Assistance Information (cont.)
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-7
Reporting Safety Defects to General Motors....7-15
Reporting Safety Defects to the
Canadian Government..............................7-15
Reporting Safety Defects to the
United States Government.........................7-15
Roadside Assistance Program......................... 7-7
Service Publications Ordering Information........7-16
D
Daytime Running Lamp...................................3-16
Defensive Driving............................................. 4-2
Delayed Entry Lighting.....................................3-18
Delayed Exit Lighting.......................................3-18
Delayed Locking.............................................2-11
DIC Compass.................................................3-54
Disc, MP3......................................................3-88
Doing Your Own Service Work........................... 5-4
Door
Delayed Locking..........................................2-11
Locks........................................................2-10
Power Door Locks.......................................2-10
Programmable Automatic Door Locks.............2-11
Rear Door Security Locks.............................2-12Driver Information Center (DIC).........................3-49
DIC Operation and Displays..........................3-49
DIC Vehicle Customization............................3-66
DIC Warnings and Messages........................3-56
Driving
At Night.....................................................4-12
Before a Long Trip......................................4-13
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Highway Hypnosis.......................................4-13
Hill and Mountain Roads..............................4-14
In Rain and on Wet Roads...........................4-12
Rocking Your Vehicle to Get it Out.................4-18
Winter........................................................4-15
Driving for Better Fuel Economy......................... 4-2
Dual Automatic Climate Control System.............3-24
E
EDR .............................................................7-17
Electrical System
Add-On Equipment.....................................5-100
Fuses and Circuit Breakers.........................5-101
Power Windows and Other Power Options....5-101
Rear Underseat Fuse Block.........................5-104
Underhood Fuse Block...............................5-101
Electronic Immobilizer
PASS-Key
®III+...........................................2-18
4

J
Jump Starting.................................................5-46
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
L
Labeling, Tire Sidewall.....................................5-60
Lamp
Malfunction Indicator....................................3-43
Lamps
Cornering...................................................3-17
Courtesy....................................................3-18
Exterior Lighting Battery Saver......................3-17
Front Reading.............................................3-18
Inadvertent Power Battery Saver....................3-19
Lane Departure Warning..................................2-44
Lane Departure Warning Light..........................3-41
Lap Belt........................................................1-33
Lap-Shoulder Belt...........................................1-27
LATCH System for Child Restraints...................1-45
License Plate Lamps.......................................5-57Light
Airbag Readiness........................................3-36
Antilock Brake System (ABS) Warning............3-39
Brake System Warning.................................3-38
Charging System.........................................3-38
Cruise Control.............................................3-47
Engine Coolant Temperature Warning.............3-42
Fog Lamp ..................................................3-47
Highbeam On.............................................3-47
Lane Departure Warning...............................3-41
Oil Pressure...............................................3-46
Passenger Airbag Status Indicator..................3-37
Safety Belt Reminders..................................3-35
Security.....................................................3-46
StabiliTrak
®Indicator....................................3-41
TCS Warning Light......................................3-40
Tire Pressure..............................................3-43
Traction Control System (TCS) Warning..........3-40
Lighting
Delayed Entry.............................................3-18
Delayed Exit...............................................3-18
Entry.........................................................3-18
Perimeter...................................................3-18
Theater Dimming.........................................3-18
Lights
Exterior Lamps............................................3-15
Flash-to-Pass............................................... 3-9
7

Lights (cont.)
High/Low Beam Changer................................ 3-9
On Reminder..............................................3-16
Loading Your Vehicle.......................................4-18
Lockout Protection..........................................2-12
Locks
Delayed Locking..........................................2-11
Door ..........................................................2-10
Lockout Protection.......................................2-12
Power Door ................................................2-10
Programmable Automatic Door Locks.............2-11
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-10
Lower Anchors and Tethers for Children.............1-45
Lumbar
Power Controls............................................. 1-5
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month.................................. 6-9
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7Maintenance Schedule (cont.)
Maintenance Record....................................6-15
Maintenance Replacement Parts....................6-13
Maintenance Requirements............................. 6-2
Owner Checks and Services........................... 6-8
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using.......................................................... 6-3
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Lamp...............................3-43
Manual Seats................................................... 1-4
Memory Seat and Mirrors.................................. 1-8
Message
DIC Warnings and Messages........................3-56
Mirrors
Automatic Dimming Rearview........................2-34
Manual Rearview Mirror with Compass and
Temperature............................................1-12
Outside Automatic Dimming Mirror.................2-36
Outside Convex Mirror.................................2-37
Outside Heated Mirrors................................2-37
Outside Power Mirrors..................................2-36
Park Tilt.....................................................2-37
MP3 .............................................................3-88
MyGMLink.com................................................ 7-5
8

Power
Door Locks.................................................2-10
Electrical System.......................................5-101
Inadvertent Battery Saver.............................3-19
Lumbar Controls........................................... 1-5
Retained Accessory.....................................2-22
Seat ............................................................ 1-5
Steering Fluid.............................................5-38
Tilt Wheel and Telescopic Steering Column....... 3-7
Windows....................................................2-16
Privacy..........................................................7-17
Event Data Recorders..................................7-17
Navigation System.......................................7-18
OnStar .......................................................7-18
Radio Frequency Identication.......................7-18
Programmable Automatic Door Locks.................2-11
R
Radiator Pressure Cap....................................5-35
Radio Frequency Identication (RFID), Privacy....7-18
Radio(s)........................................................3-78
Radios
Navigation/Radio System, see Navigation
Manual...................................................3-93
Reception.................................................3-105
Setting the Clock.........................................3-76
Theft-Deterrent..........................................3-104
Rainsense™ II Wipers.....................................3-10Rear Door Security Locks................................2-12
Rear Seat Armrest..........................................2-57
Rearview Mirror, Automatic Dimming..................2-34
Rearview Mirror with Compass and
Temperature...............................................1-12
Reclining Seatbacks.......................................... 1-9
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-24
Remote Keyless Entry (RKE) System.................. 2-4
Remote Keyless Entry (RKE) System, Operation . . . 2-5
Remote Vehicle Start........................................ 2-8
Removing the Flat Tire and Installing the
Spare Tire..................................................5-84
Removing the Spare Tire and Tools...................5-83
Replacement Bulbs.........................................5-57
Replacement Parts, Maintenance......................6-13
Reporting Safety Defects
Canadian Government..................................7-15
General Motors...........................................7-15
United States Government............................7-15
Restraint System Check
Checking the Restraint Systems....................1-74
Replacing Restraint System Parts
After a Crash..........................................1-75
Retained Accessory Power...............................2-22
Roadside
Assistance Program....................................... 7-7
Rocking Your Vehicle to Get it Out....................4-18
Routing, Engine Drive Belt...............................6-14
Running the Vehicle While Parked.....................2-33
10

S
Safety Belt Reminders.....................................3-35
Safety Belts
Care of ......................................................5-95
How to Wear Safety Belts Properly................1-18
Lap Belt.....................................................1-33
Lap-Shoulder Belt........................................1-27
Safety Belt Extender....................................1-34
Safety Belt Use During Pregnancy.................1-33
Safety Belts Are for Everyone.......................1-12
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4
Seats
Center Seat................................................1-12
Heated and Cooled Seats.............................. 1-7
Heated Seats............................................... 1-6
Memory, Mirrors............................................ 1-8
Power Lumbar .............................................. 1-5
Power Seats................................................. 1-5
Reclining Seatbacks...................................... 1-9
Securing a Child Restraint
Center Front Seat Position............................1-54
Rear Seat Position......................................1-51
Right Front Seat Position..............................1-54
Security Light.................................................3-46
Service........................................................... 5-3
Accessories and Modications......................... 5-3
Adding Equipment to the Outside of the
Vehicle..................................................... 5-5Service (cont.)
California Perchlorate Materials Requirements . . . 5-4
California Proposition 65 Warning.................... 5-4
Doing Your Own Work................................... 5-4
Engine Soon Lamp......................................3-43
Publications Ordering Information...................7-16
Service, Scheduling Appointments.....................7-10
Servicing Your Airbag-Equipped Vehicle..............1-72
Setting the Clock............................................3-76
Sheet Metal Damage.......................................5-99
Shifting Into Park............................................2-28
Shifting Out of Park........................................2-31
Side Blind Zone Alert......................................2-40
Signals, Turn and Lane-Change.......................... 3-8
Spare Tire
Compact....................................................5-91
Installing
....................................................5-84
Removing...................................................5-83
Storing.......................................................5-89
Specications, Capacities...............................5-109
Speedometer..................................................3-34
StabiliTrak
®Indicator Light...............................3-41
Stabilitrak®System........................................... 4-6
Start Vehicle, Remote....................................... 2-8
Starting the Engine.........................................2-22
Steering.......................................................... 4-8
Steering Wheel Controls, Audio.......................3-104
Steering Wheel, Heated..................................... 3-7
Steering Wheel, Power Tilt Wheel and
Telescopic Steering Column............................ 3-7
11