2009 BUICK LACROSSE check engine

Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough
room around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake. SeeParking Brake
on page 2-29.
Be ready to apply the regular brake immediately
if the vehicle begins to move.
3. With the engine off, turn the ignition to ON/RUN,
but do not start the engine. Without applying the
regular brake, try to move the shift lever out
of P (Park) with normal effort. If the shift lever
moves out of P (Park), contact your dealer/retailer
for service.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition to LOCK/OFF in each shift lever position.
The ignition should turn to LOCK/OFF only
when the shift lever is in P (Park).
The ignition key should come out only in
LOCK/OFF.
Contact your dealer/retailer if service is required.
Parking Brake and Automatic
Transmission P (Park) Mechanism
Check
{CAUTION:
When you are doing this check, the vehicle could
begin to move. You or others could be injured and
property could be damaged. Make sure there is
room in front of the vehicle in case it begins to roll.
Be ready to apply the regular brake at once
should the vehicle begin to move.
6-10

Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake,
set the parking brake.
To check the parking brake’s holding ability:
With the engine running and the transmission
in N (Neutral), slowly remove foot pressure from the
regular brake pedal. Do this until the vehicle is
held by the parking brake only.
To check the P (Park) mechanism’s holding ability:
With the engine running, shift to P (Park). Then
release the parking brake followed by the regular
brake.
Contact your dealer/retailer if service is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other
debris can collect.
Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name, part
number, or specication can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine OilEngine oil which meets GM Standard
GM6094M and displays the
American Petroleum Institute
Certied for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, seeEngine Oil on page 5-15.
Engine Coolant50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 5-25.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
WasherOptikleen
®Washer Solvent.
6-11

Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle suspension,
brakes, electrical, steering, body, etc.
Service Bulletins
Service Bulletins give additional technical service
information needed to knowledgeably service General
Motors cars and trucks. Each bulletin contains
instructions to assist in the diagnosis and service of
your vehicle.
Owner Information
Owner publications are written specically for owners
and intended to provide basic operational information
about the vehicle. The owner manual includes the
Maintenance Schedule for all models.
In-Portfolio: Includes a Portfolio, Owner Manual, and
Warranty Booklet.
RETAIL SELL PRICE: $35.00 (U.S.) plus processing fee
Without Portfolio: Owner Manual only.
RETAIL SELL PRICE: $25.00 (U.S.) plus processing fee
Current and Past Model Order Forms
Technical Service Bulletins and Manuals are available
for current and past model GM vehicles. To request
an order form, specify year and model name of
the vehicle.
ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM - 6:00 PM
Eastern Time
For Credit Card Orders Only
(VISA-MasterCard-Discover), visit Helm, Inc. on the
World Wide Web at: helminc.com
Or you can write to:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
Prices are subject to change without notice and without
incurring obligation. Allow ample time for delivery.
Note to Canadian Customers: All listed prices are
quoted in U.S. funds. Canadian residents are to make
checks payable in U.S. funds.
7-16

Audio System(s).............................................3-83
Automatic Door Lock.......................................2-10
Automatic Transmission
Fluid..........................................................5-22
Operation...................................................2-26
B
Backglass Antenna........................................3-113
Battery..........................................................5-40
Electric Power Management..........................3-18
Exterior Lighting Battery Saver......................3-15
Run-Down Protection...................................3-19
Bluetooth
®.....................................................3-99
Brake
Emergencies................................................ 4-5
Brake Fluid....................................................5-37
Brakes..........................................................5-37
System Warning Light..................................3-35
Braking........................................................... 4-4
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-21
Bulb Replacement...........................................5-49
Halogen Bulbs............................................5-49
Headlamp Aiming........................................5-46
License Plate Lamps....................................5-52Bulb Replacement (cont.)
Replacement Bulbs......................................5-52
Taillamps, Turn Signal, Sidemarker,
Stoplamps, and Back-Up Lamps.................5-50
Buying New Tires...........................................5-69
C
Calibration.....................................................3-54
California Fuel.................................................. 5-6
California Perchlorate Materials
Requirements............................................... 5-4
California Proposition 65 Warning....................... 5-4
Canadian Owners................................................ ii
Capacities and Specications..........................5-106
Carbon Monoxide...........................2-12, 2-33, 4-17
Care of
Safety Belts................................................5-93
CD, MP3 .......................................................3-95
Center Console Storage Area...........................2-47
Center Seat..................................................... 1-7
Chains, Tire...................................................5-75
Charging System Light....................................3-35
Check
Engine Lamp..............................................3-40
Check Gas Cap Light......................................3-47
Checking Things Under the Hood......................5-10
2

Electrical System (cont.)
Underhood Fuse Block...............................5-101
Windshield Wiper Fuses...............................5-99
Electronic Immobilizer
PASS-Key
®III+...........................................2-18
Electronic Immobilizer Operation
PASS-Key
®III .............................................2-19
Engine
Air Cleaner/Filter.........................................5-20
Change Engine Oil Light...............................3-43
Check and Service Engine Soon Lamp...........3-40
Coolant......................................................5-25
Coolant Heater............................................2-24
Coolant Temperature Gage...........................3-38
Coolant Temperature Warning Light................3-38
Drive Belt Routing.......................................6-14
Engine Compartment Overview......................5-12
Exhaust.....................................................2-33
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-34
Overheating................................................5-31
Reduced Power Light...................................3-44
Starting......................................................2-23
Enhanced Traction System (ETS)........................ 4-8
Warning Light.............................................3-37
Entry Lighting.................................................3-16Event Data Recorders.....................................7-17
Extender, Safety Belt.......................................1-29
Exterior Lamps...............................................3-13
Exterior Lighting Battery Saver..........................3-15F
Filter
Engine Air Cleaner......................................5-20
Finish Damage...............................................5-97
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-76
Flat Tire, Changing.........................................5-76
Flat Tire, Storing.....................................5-84, 5-87
Fluid
Automatic Transmission................................5-22
Power Steering...........................................5-34
Windshield Washer......................................5-35
Fog Lamp
Fog ...........................................................3-15
Folding Rear Seat............................................ 1-7
Fuel............................................................... 5-5
Additives...................................................... 5-7
California Fuel.............................................. 5-6
Check Gas Cap Light...................................3-47
Driving for Better Economy............................. 4-2
5

Fuel (cont.)
Filling a Portable Fuel Container....................5-10
Filling the Tank............................................. 5-8
Fuels in Foreign Countries.............................. 5-7
Gage .........................................................3-46
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Low Warning Light.......................................3-47
Fuses
Fuses and Circuit Breakers...........................5-99
Instrument Panel Fuse Block.......................5-100
Underhood Fuse Block...............................5-101
Windshield Wiper.........................................5-99
G
Gage
Engine Coolant Temperature.........................3-38
Fuel..........................................................3-46
Speedometer..............................................3-32
Tachometer.................................................3-32
Garage Door Opener.......................................2-43
Gasoline
Octane........................................................ 5-6
Specications............................................... 5-6
Glove Box.....................................................2-47
GM Mobility Reimbursement Program.................. 7-7
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-6
Headlamp
Aiming .......................................................5-46
Headlamp Wiring............................................5-99
Headlamps
Bulb Replacement.......................................5-49
Daytime Running Lamps/Automatic
Headlamp System....................................3-14
Exterior Lamps............................................3-13
Flash-to-Pass............................................... 3-8
Halogen Bulbs............................................5-49
High/Low Beam Changer................................ 3-8
Suggested Light..........................................3-44
Heated Seats................................................... 1-3
Heater...........................................................3-21
Engine Coolant...........................................2-24
Heater...........................................................3-25
Highbeam On Light.........................................3-44
Highway Hypnosis...........................................4-15
Hill and Mountain Roads..................................4-16
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn ............................................................... 3-6
How to Wear Safety Belts Properly...................1-13
6

I
Ignition Positions.............................................2-21
Infants and Young Children, Restraints...............1-33
Ination - Tire Pressure...................................5-61
Instrument Panel
Brightness..................................................3-16
Cluster.......................................................3-31
Overview..................................................... 3-4
Interior Lamps................................................3-16
J
Jump Starting.................................................5-41
K
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Labeling, Tire Sidewall.....................................5-55
Lamp
Malfunction Indicator....................................3-40
Lamps
Courtesy....................................................3-16
Exterior Lighting Battery Saver......................3-15
Overhead Console Reading..........................3-18
Rear Assist Handle Reading..........................3-18Lap Belt........................................................1-28
Lap-Shoulder Belt...........................................1-22
LATCH System for Child Restraints...................1-41
License Plate Lamps.......................................5-52
Light
Airbag Readiness........................................3-33
Antilock Brake System (ABS) Warning............3-36
Brake System Warning.................................3-35
Change Engine Oil......................................3-43
Charging System.........................................3-35
Check Gas Cap..........................................3-47
Cruise Control.............................................3-43
Door Ajar...................................................3-45
Engine Coolant Temperature Warning.............3-38
Enhanced Traction System (ETS)
Warning Light..........................................3-37
Headlamps Suggested.................................3-44
Highbeam On.............................................3-44
Low Coolant Warning...................................3-39
Low Fuel Warning.......................................3-47
Low Washer Fluid Warning...........................3-45
Oil Pressure...............................................3-42
Passenger Airbag Status Indicator..................3-34
Reduced Engine Power................................3-44
Safety Belt Reminders..................................3-32
Security.....................................................3-43
Service Vehicle Soon...................................3-45
TCS Warning Light......................................3-37
7

Mirrors
Automatic Dimming Rearview........................2-35
Manual Rearview Mirror................................2-35
Outside Convex Mirror.................................2-36
Outside Heated Mirrors................................2-36
Outside Power Mirrors..................................2-36
MP3 .............................................................3-95
MyGMLink.com................................................ 7-5
N
Navigation System, Privacy..............................7-18
New Vehicle Break-In......................................2-21
O
Odometer......................................................3-32
Off-Road Recovery..........................................4-11
Oil
Change Engine Oil Light...............................3-43
Engine.......................................................5-15
Pressure Light.............................................3-42
Oil, Engine Oil Life System..............................5-18
Older Children, Restraints................................1-29
Online Owner Center........................................ 7-5OnStar, Privacy..............................................7-18
OnStar
®System, see OnStar®Manual...............2-39
Operation, Universal Home Remote System........2-43
Outlet Adjustment............................................3-28
Outlets
Accessory Power.........................................3-20
Outside
Convex Mirror.............................................2-36
Heated Mirrors............................................2-36
Power Mirrors.............................................2-36
Overhead Console Reading Lamps....................3-18
Overheated Engine Protection
Operating Mode..........................................5-34
Owner Checks and Services.............................. 6-8
Owners, Canadian............................................... ii
P
Paint, Damage...............................................5-97
Park
Shifting Into................................................2-29
Shifting Out of............................................2-32
Park Aid........................................................2-37
Park Brake....................................................2-29
Parking
Assist........................................................2-37
Over Things That Burn.................................2-33
9