2007 CHEVROLET IMPALA octane

Did you just drive through a deep puddle
of water?
If so, your electrical system may be wet. The
condition will usually be corrected when the
electrical system dries out. A few driving trips
should turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 298. Poor fuel
quality will cause your engine not to run as
efficiently as designed. You may notice this as
stalling after start-up, stalling when you put
the vehicle into gear, misring, hesitation on
acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is
warmed up.) This will be detected by the system
and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at
least one full tank of the proper fuel to turn the
light off.
If none of the above steps have made the light
turn off, your dealer can check the vehicle.
Your dealer has the proper test equipment and
diagnostic tools to x any mechanical or electrical
problems that may have developed.Emissions Inspection and Maintenance
Programs
Some state/provincial and local governments have
or may begin programs to inspect the emission
control equipment on your vehicle. Failure to pass
this inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
check engine light is on or not working properly.
Your vehicle will not pass this inspection if
the OBD (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 you have recently
replaced your battery or if your battery has
run down. The diagnostic system is designed to
evaluate critical emission control systems
during normal driving. This may take several days
of routine driving. If you have done this and
your vehicle still does not pass the inspection for
lack of OBD system readiness, your dealer
can prepare the vehicle for inspection.
187

Service........................................................ 296
Accessories and Modications................... 296
California Proposition 65 Warning.............. 297
Doing Your Own Service Work.................. 297
Adding Equipment to the Outside of
Your Vehicle.......................................... 298
Fuel............................................................. 298
Gasoline Octane........................................ 298
Gasoline Specications.............................. 299
California Fuel........................................... 299
Additives................................................... 299
Fuel E85 (85% Ethanol)............................ 300
Fuels in Foreign Countries........................ 301
Filling the Tank......................................... 302
Filling a Portable Fuel Container............... 304
Checking Things Under the Hood.............. 304
Hood Release........................................... 305
Engine Compartment Overview.................. 306
Engine Oil................................................. 310
Engine Oil Life System.............................. 314
Engine Air Cleaner/Filter............................ 316
Automatic Transaxle Fluid......................... 317Engine Coolant.......................................... 320
Pressure Cap............................................ 323
Engine Overheating................................... 323
Overheated Engine Protection
Operating Mode..................................... 326
Cooling System......................................... 326
Power Steering Fluid................................. 332
Windshield Washer Fluid........................... 333
Brakes...................................................... 334
Battery...................................................... 337
Jump Starting............................................ 338
Headlamp Aiming........................................ 343
Bulb Replacement....................................... 343
Halogen Bulbs........................................... 344
Headlamps, Front Turn Signal,
Sidemarker, and Parking Lamps............. 344
Taillamps, Turn Signal, Sidemarker,
Stoplamps and Back-up Lamps.............. 346
License Plate Lamp................................... 348
Replacement Bulbs................................... 349
Windshield Wiper Blade Replacement....... 349
Section 5 Service and Appearance Care
293

Adding Equipment to the Outside of
Your Vehicle
Things you might add to the outside of your
vehicle can affect the airow around it. This may
cause wind noise and affect windshield washer
performance. Check with your dealer before
adding equipment to the outside of your vehicle.
Fuel
Use of the recommended fuel is an important part
of the proper maintenance of your vehicle. To
help keep the engine clean and maintain optimum
vehicle performance, GM recommends the use
of gasoline advertised as TOP TIER Detergent
Gasoline.
The 8th digit of the Vehicle Identication Number
(VIN) shows the code letter or number that
identies your vehicle’s engine. The VIN is at the
top left of the instrument panel. SeeVehicle
Identication Number (VIN) on page 396.
If your vehicle has the 3.5L V6 engine (VIN Code K
only), you can use either regular unleaded gasoline
or ethanol fuel containing up to 85% ethanol (E85);
also seeFuel E85 (85% Ethanol) on page 300.In
all other engines, use only regular unleaded
gasoline.
Gasoline Octane
For all vehicles except those with the 5.3L V8
engine (VIN Code C), 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.
If your vehicle has the 5.3L V8 engine
(VIN Code C), use premium unleaded gasoline
with a posted octane rating of 91 or higher.
You can also use regular unleaded gasoline
rated at 87 octane or higher, but your vehicle’s
acceleration could be slightly reduced, and you
might notice a slight audible knocking noise,
commonly referred to as spark knock. If the octane
is less than 87, you might notice a heavy knocking
noise when you drive. If this occurs, use a gasoline
rated at 87 octane or higher as soon as possible.
Otherwise, you could damage the engine. If you are
using gasoline rated at 87 octane or higher and you
hear heavy knocking, the engine needs service.
298

Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 299for additional information.
California Fuel
If your 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, your vehicle will operate satisfactorily on
fuels meeting federal specications, but emission
control system performance may be affected. The
malfunction indicator lamp may turn on and your
vehicle may fail a smog-check test. SeeMalfunction
Indicator Lamp on page 185. If this occurs, return to
your authorized GM dealer for diagnosis. If it is
determined that the condition is caused by the type
of fuel used, repairs may not be covered by your
warranty.
Additives
To provide cleaner air, all gasolines in the United
States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your 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 your vehicle experiences problems due to
dirty injectors or valves, look for gasoline that is
advertised as TOP TIER Detergent Gasoline. Also,
your dealer has additives that will help correct
and prevent most deposit-related problems.
299

Gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may
be available in your area. General Motors
recommends 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:Your 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 your warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you
buy gasoline whether the fuel contains MMT.
General Motors recommends against the use of
such gasolines. Fuels containing MMT can reduce
the life of spark plugs and the performance of
the emission control system may be affected.
The malfunction indicator lamp may turn on.
If this occurs, return to your dealer for service.Fuel E85 (85% Ethanol)
The 8th digit of the Vehicle Identication Number
(VIN) shows the code letter or number that
identies your vehicle’s engine. The VIN is at
the top left of the instrument panel. SeeVehicle
Identication Number (VIN) on page 396.
If your vehicle has the 3.5L V6 engine
(VIN Code K only), you can use either regular
unleaded gasoline or ethanol fuel containing up to
85% ethanol (E85); also seeFuel on page 298.
In all other engines, including the 3.5L V6
(VIN Code N), use only regular unleaded gasoline.
Only vehicles that have the 3.5L V6 engine
(VIN Code K) can use 85% ethanol fuel (E85).
We encourage the use of E85 in vehicles that
are designed to use it. The ethanol in E85
is a “renewable” fuel, meaning it is made from
renewable sources such as corn and other crops.
Many service stations will not have an 85% ethanol
fuel (E85) pump available. The U. S. Department
of Energy has an alternative fuels website
(www.eere.energy.gov/afdc/infrastructure/
locator.html) that can help you nd E85 fuel.
Those stations that do have E85 should have a
label indicating ethanol content. Do not use the
fuel if the ethanol content is greater than 85%.
300

Using the Maintenance Schedule
We at General Motors want to help you keep your
vehicle in good working condition. But we do
not know exactly how you will drive it. You may
drive very short distances only a few times a week.
Or you may drive long distances all the time in
very hot, dusty weather. You may use your vehicle
in making deliveries. Or you may 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 may
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 your vehicle in good condition, see your
GM Goodwrench
®dealer.
This schedule is for vehicles that:
carry passengers and cargo within
recommended limits. You will nd these limits
on the Tire and Loading Information label.
SeeLoading Your Vehicle on page 277.
are driven on reasonable road surfaces within
legal driving limits.
use the recommended fuel. SeeGasoline
Octane on page 298.The services inScheduled Maintenance on
page 408should be performed when indicated.
SeeAdditional Required Services on page 411and
Maintenance Footnotes on page 412for further
information.
{CAUTION:
Performing maintenance work on a
vehicle can be dangerous. In trying to do
some jobs, you can be seriously injured.
Do your own maintenance work only if
you have the required know-how and the
proper tools and equipment for the job.
If you have any doubt, see your GM
Goodwrench
®dealer to have a qualied
technician do the work.
Some maintenance services can be complex.
So, unless you are technically qualied and have
the necessary equipment, you should have
your GM Goodwrench
®dealer do these jobs.
407

Engine (cont.)
Oil ........................................................... 310
Oil Life System........................................ 314
Overheated Protection Operating Mode.... 326
Overheating............................................. 323
Running While Parked............................. 125
Starting.................................................... 113
Entry Lighting.............................................. 164
Event Data Recorders................................. 443
Extender, Safety Belt..................................... 40
Exterior Lamps............................................ 160
F
Filter
Engine Air Cleaner................................... 316
Finish Damage............................................ 393
Flashers, Hazard Warning........................... 152
Flash-to-Pass.............................................. 155
Flat Tire...................................................... 373
Flat Tire, Changing...................................... 374
Flat Tire, Storing......................................... 383Fluid
Power Steering........................................ 332
Windshield Washer.................................. 333
Fog Lamp
Fog .......................................................... 163
Fog Lamp Light........................................... 189
Folding Rear Seat......................................... 15
Fuel............................................................ 298
Additives.................................................. 299
California Fuel.......................................... 299
E85 (85% Ethanol)................................... 300
Filling a Portable Fuel Container.............. 304
Filling Your Tank...................................... 302
Fuels in Foreign Countries....................... 301
Gage....................................................... 190
Gasoline Octane...................................... 298
Gasoline Specications............................ 299
Fuses
Fuses and Circuit Breakers...................... 398
Instrument Panel Fuse Block................... 398
Underhood Fuse Block............................. 400
Windshield Wiper..................................... 397
450

G
Gage
Engine Coolant Temperature.................... 184
Fuel......................................................... 190
Speedometer........................................... 176
Tachometer.............................................. 176
Garage Door Opener................................... 133
Gasoline
Octane..................................................... 298
Specications........................................... 299
Glove Box................................................... 144
GM Mobility Reimbursement Program.......... 431
H
Hazard Warning Flashers............................ 152
Head Restraints............................................ 13
Headlamp
Aiming..................................................... 343
Headlamp Wiring......................................... 397Headlamps
Bulb Replacement.................................... 343
Daytime Running Lamps/Automatic
Headlamp System................................ 162
Delayed................................................... 162
Exterior Lamps......................................... 160
Flash-to-Pass........................................... 155
Halogen Bulbs......................................... 344
Headlamps, Front Turn Signal,
Sidemarker, and Parking Lamps ........... 344
High/Low Beam Changer......................... 155
Heated Seats................................................ 10
Heater......................................................... 168
Highbeam On Light..................................... 189
Highway Hypnosis....................................... 270
Hill and Mountain Roads............................. 270
Hood
Checking Things Under............................ 304
Release................................................... 305
Horn............................................................ 152
How to Use This Manual................................ 4
How to Wear Safety Belts Properly............... 23
451