octane BUICK ENCLAVE 2009 Owner's Manual

An emission system malfunction
might be corrected by:
Make sure the fuel cap is fully
installed. SeeFilling the Tank on
page 5-7. The diagnostic system
can determine if the fuel cap
has been left off or improperly
installed. A loose or missing fuel
cap allows fuel to evaporate into
the atmosphere. A few driving
trips with the cap properly
installed should turn the light off.
If the vehicle has been driven
through a deep puddle of water,
the vehicle’s electrical system
might be wet. The condition is
usually corrected when the
electrical system dries out. A
few driving trips should turn the
light off.
Make sure to fuel the vehicle with
quality fuel. Poor fuel quality
causes the engine not to run as
efficiently as designed and may
cause: stalling after start-up,
stalling when the vehicle is
changed into gear, misring,hesitation on acceleration, or
stumbling on acceleration. These
conditions might go away once
the engine is warmed up.
If one or more of these conditions
occurs, change the fuel brand
used. It will require at least one
full tank of the proper fuel to turn
the light off.
SeeGasoline Octane on
page 5-5.
If none of the above have made the
light turn off, your dealer/retailer can
check the vehicle. The dealer/retailer
has the proper test equipment and
diagnostic tools to x any mechanical
or electrical problems that might
have developed.
Emissions Inspection and
Maintenance Programs
Some state/provincial and local
governments have or might begin
programs to inspect the emission
control equipment on the vehicle.
Failure to pass this inspection could
prevent getting a vehicle registration.Here are some things to know to
help the vehicle pass an inspection:
The vehicle will not pass this
inspection if the check engine
light is on with the engine
running, or if the key is in
ON/RUN and the light is not on.
The vehicle will not pass this
inspection if the OBD II (on-board
diagnostic) system determines
that critical emission control
systems have not been
completely diagnosed by the
system. The vehicle would be
considered not ready for
inspection. This can happen if the
battery has recently been
replaced or if the battery has run
down. The diagnostic system is
designed to evaluate critical
emission control systems during
normal driving. This can take
several days of routine driving.
3-38 Instrument Panel

Service and
Appearance Care
Service
Service...............................5-3
Accessories and
Modications.....................5-3
California Proposition 65
Warning............................5-3
California Perchlorate
Materials Requirements.....5-4
Doing Your Own
Service Work....................5-4
Adding Equipment to the
Outside of the Vehicle......5-4
Fuel
Fuel....................................5-5
Gasoline Octane.................5-5
Gasoline Specications.......5-5
California Fuel....................5-5
Additives.............................5-5
Fuels in Foreign
Countries..........................5-6
Filling the Tank...................5-7
Filling a Portable Fuel
Container..........................5-8
Checking Things Under
the Hood
Checking Things Under
the Hood..........................5-9
Hood Release.....................5-9
Engine Compartment
Overview.........................5-10
Engine Oil.........................5-11
Engine Oil Life System.....5-13
Engine Air Cleaner/Filter. . . .5-14
Automatic Transmission
Fluid................................5-15
Cooling System.................5-16
Engine Coolant.................5-17
Engine Overheating...........5-20
Overheated Engine
Protection
Operating Mode
..............5-22
Power Steering Fluid.........5-22
Windshield Washer
Fluid................................5-23
Brakes..............................5-24
Battery..............................5-27
Jump Starting...................5-28
All-Wheel Drive
All-Wheel Drive.................5-32
Headlamp Aiming
Headlamp Aiming..............5-33
Bulb Replacement
Bulb Replacement.............5-33
High Intensity Discharge
(HID) Lighting..................5-33
Halogen Bulbs..................5-34
Taillamps, Turn Signal,
Stoplamps and
Sidemarker Lamps
..........5-34
License Plate Lamp..........5-35
Replacement Bulbs...........5-35
Windshield Replacement
Windshield
Replacement...................5-35
Windshield Wiper Blade
Replacement
Windshield Wiper Blade
Replacement...................5-36
Tires
Tires.................................5-36
Tire Sidewall Labeling.......5-37
Service and Appearance Care 5-1

Fuel
Use of the recommended fuel is
an important part of the proper
maintenance of this vehicle. To help
keep the engine clean and maintain
optimum vehicle performance, we
recommend the use of gasoline
advertised as TOP TIER Detergent
Gasoline.
Gasoline Octane
Use regular unleaded gasoline with
a posted octane rating of 87 or
higher. If the octane rating is less
than 87, you might notice an audible
knocking noise when you drive,
commonly referred to as spark
knock. If this occurs, use a gasoline
rated at 87 octane or higher as
soon as possible. If you are using
gasoline rated at 87 octane or higher
and you hear heavy knocking, the
engine needs service.
Gasoline Specications
At a minimum, gasoline should
meet ASTM specication D 4814
in the United States or CAN/
CGSB-3.5 or 3.511 in Canada.
Some gasolines contain an
octane-enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). We recommend
against the use of gasolines
containing MMT. SeeAdditives on
page 5-5for additional information.
California Fuel
If the vehicle is certied to meet
California Emissions Standards, it is
designed to operate on fuels that
meet California specications. See
the underhood emission control
label. If this fuel is not available in
states adopting California emissions
standards, the vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control
system performance might be
affected. The malfunction indicator
lamp could turn on and the vehiclemight fail a smog-check test. See
Malfunction Indicator Lamp on
page 3-36. If this occurs, return to
your authorized dealer/retailer for
diagnosis. If it is determined that the
condition is caused by the type of
fuel used, repairs might not be
covered by the vehicle warranty.
Additives
To provide cleaner air, all gasolines
in the United States are now
required to contain additives that
help prevent engine and fuel system
deposits from forming, allowing
the emission control system to work
properly. In most cases, you
should not have to add anything to
the fuel. However, some gasolines
contain only the minimum amount of
additive required to meet U.S.
Environmental Protection Agency
regulations. To help keep fuel
injectors and intake valves clean, or
if the vehicle experiences problems
due to dirty injectors or valves,
look for gasoline that is advertised
as TOP TIER Detergent Gasoline.
Service and Appearance Care 5-5

Also, your dealer/retailer has
additives that will help correct and
prevent most deposit-related
problems.
Gasolines containing oxygenates,
such as ethers and ethanol,
and reformulated gasolines might
be available in your area. We
recommend that you use these
gasolines, if they comply with
the specications described earlier.
However, E85 (85% ethanol)
and other fuels containing more
than 10% ethanol must not be used
in vehicles that were not designed
for those fuels.
Notice:This vehicle was not
designed for fuel that contains
methanol. Do not use fuel
containing methanol. It can
corrode metal parts in the fuel
system and also damage plastic
and rubber parts. That damage
would not be covered under
the vehicle warranty.Some gasolines that are not
reformulated for low emissions
can contain an octane-enhancing
additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the
attendant where you buy gasoline
whether the fuel contains MMT. We
recommend against the use of
such gasolines. Fuels containing
MMT can reduce the life of
spark plugs and the performance of
the emission control system
could be affected. The malfunction
indicator lamp might turn on. If
this occurs, return to your
dealer/retailer for service.Fuels in Foreign
Countries
If you plan on driving in another
country outside the United States or
Canada, the proper fuel might be
hard to nd. Never use leaded
gasoline or any other fuel not
recommended in the previous text
on fuel. Costly repairs caused
by use of improper fuel would not
be covered by the vehicle warranty.
To check the fuel availability, ask
an auto club, or contact a major oil
company that does business in
the country where you will be
driving.
5-6 Service and Appearance Care

Maintenance
Requirements
Notice:Maintenance intervals,
checks, inspections, replacement
parts, and recommended uids
and lubricants as prescribed
in this manual are necessary to
keep this vehicle in good working
condition. Any damage caused
by failure to follow scheduled
maintenance might not be
covered by the vehicle warranty.
Your Vehicle and the
Environment
Proper vehicle maintenance not only
helps to keep the vehicle in good
working condition, but also helps the
environment. All recommended
maintenance is important. Improper
vehicle maintenance can even
affect the quality of the air we
breathe. Improper uid levels or the
wrong tire ination can increase
the level of emissions from the
vehicle. To help protect theenvironment, and to keep the
vehicle in good condition, be sure to
maintain the vehicle properly.
Using the Maintenance
Schedule
We want to help keep this vehicle in
good working condition. But we
do not know exactly how you
will drive it. You might drive very
short distances only a few times a
week. Or you might drive long
distances all the time in very hot,
dusty weather. You might use
the vehicle in making deliveries. Or
you might drive it to work, to do
errands, or in many other ways.
Because of all the different
ways people use their vehicles,
maintenance needs vary. You might
need more frequent checks and
replacements. So please read the
following and note how you
drive. If you have any questions on
how to keep the vehicle in good
condition, see your dealer/retailer.This schedule is for vehicles that:
carry passengers and cargo
within recommended limits on the
Tire and Loading Information
label. SeeLoading the Vehicle on
page 4-16.
are driven on reasonable road
surfaces within legal driving
limits.
use the recommended fuel. See
Gasoline Octane on page 5-5.
The services inScheduled
Maintenance on page 6-3should be
performed when indicated. See
Additional Required Services
on page 6-6andMaintenance
Footnotes on page 6-7for further
information.
6-2 Maintenance Schedule

F
Filter
Engine Air Cleaner............5-14
Finish Damage....................5-90
Flashers, Hazard Warning....... 3-5
Flash-to-Pass........................ 3-7
Flat Tire..............................5-56
Flat Tire, Changing...............5-71
Flat Tire, Storing..................5-80
Floor Mats..........................2-50
Fluid
Automatic Transmission.....5-15
Power Steering.................5-22
Windshield Washer...........5-23
Fog Lamp
Fog ................................3-14
Fog Lamp Light...................3-39
Fuel..................................... 5-5
Additives........................... 5-5
California Fuel................... 5-5
Driving for Better
Economy....................... 4-1
Filling a Portable Fuel
Container....................... 5-8
Filling the Tank.................. 5-7
Fuels in Foreign Countries . . . 5-6Fuel (cont.)
Gage ..............................3-40
Gasoline Octane................ 5-5
Gasoline Specications........ 5-5
Fuses
Fuses and Circuit
Breakers......................5-92
Instrument Panel Fuse
Block...........................5-92
Underhood Fuse Block......5-94
Windshield Wiper..............5-92
G
Gage
Engine Coolant
Temperature.................3-35
Fuel................................3-40
Speedometer...................3-30
Tachometer......................3-30
Voltmeter Gage................3-33
Garage Door Opener............2-44
Gasoline
Octane............................. 5-5
Specications..................... 5-5
Glove Box...........................2-49
GM Mobility Reimbursement
Program............................ 7-5
H
Hazard Warning Flashers........ 3-5
Head Restraints..................... 1-2
Headlamp
Aiming ............................5-33
Headlamps
Adaptive Forward Lighting
System........................3-14
Bulb Replacement.............5-33
Daytime Running Lamps/
Automatic Headlamp
System........................3-13
Delayed..........................3-13
Exterior Lamps.................3-12
Flash-to-Pass..................... 3-7
Halogen Bulbs..................5-34
High Intensity Discharge
(HID) Lighting...............5-33
High/Low Beam Changer..... 3-7
Heated Seats........................ 1-4
Heater
Engine Coolant.................2-23
Heater................................3-20
High Voltage Devices and
Wiring.............................5-91
Highbeam On Light..............3-40
Highway Hypnosis................4-12
Hill and Mountain Roads.......4-13
INDEX i-5