2007 GMC ACADIA octane

Did you just drive through a deep puddle
of water?
If so, your 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.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 388. Poor fuel
quality causes the engine not to run as efficiently
as designed. You might 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
might 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/retailer can check the vehicle.
Your 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 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 the battery 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. If you have done this and
your vehicle still does not pass the inspection for
lack of OBD system readiness, your dealer/retailer
can prepare the vehicle for inspection.
228

Service........................................................ 385
Accessories and Modications................... 385
California Proposition 65 Warning.............. 386
Doing Your Own Service Work.................. 386
Adding Equipment to the Outside
of Your Vehicle...................................... 387
Fuel............................................................. 387
Gasoline Octane........................................ 388
Gasoline Specications.............................. 388
California Fuel........................................... 388
Additives................................................... 389
Fuels in Foreign Countries........................ 390
Filling the Tank......................................... 390
Filling a Portable Fuel Container............... 393
Checking Things Under the Hood.............. 394
Hood Release........................................... 395
Engine Compartment Overview.................. 396
Engine Oil................................................. 397
Engine Oil Life System.............................. 400
Engine Air Cleaner/Filter............................ 402
Automatic Transmission Fluid.................... 404
Engine Coolant.......................................... 406
Radiator Pressure Cap.............................. 410
Engine Overheating................................... 410Overheated Engine Protection
Operating Mode..................................... 412
Cooling System......................................... 413
Power Steering Fluid................................. 419
Windshield Washer Fluid........................... 420
Brakes...................................................... 421
Battery...................................................... 424
Jump Starting............................................ 425
All-Wheel Drive........................................... 430
Headlamp Aiming........................................ 431
Bulb Replacement....................................... 432
High Intensity Discharge (HID) Lighting..... 432
Halogen Bulbs........................................... 432
License Plate Lamp................................... 433
Replacement Bulbs................................... 433
Windshield Wiper Blade Replacement....... 434
Tires............................................................ 435
Tire Sidewall Labeling............................... 436
Tire Terminology and Denitions............... 439
Ination - Tire Pressure............................. 442
Tire Pressure Monitor System................... 444
Tire Inspection and Rotation...................... 448
When It Is Time for New Tires.................. 450
Section 5 Service and Appearance Care
383

Gasoline Octane
Use regular unleaded gasoline with a posted
octane rating of 87 or higher. For best performance
or trailer towing, you could choose to use middle
grade 89 octane unleaded gasoline. 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 389for 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 might be affected. The malfunction
indicator lamp could turn on and your vehicle might
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 226. 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 your warranty.
388

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 your vehicle experiences problems due
to dirty injectors or valves, look for gasoline that
is advertised as TOP TIER Detergent Gasoline.
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: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 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.
389

Using the Maintenance Schedule
We 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 dealer/retailer.
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 361.
are driven on reasonable road surfaces within
legal driving limits.
use the recommended fuel. SeeGasoline
Octane on page 388.The services inScheduled Maintenance on
page 502should be performed when indicated.
SeeAdditional Required Services on page 504and
Maintenance Footnotes on page 506for 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 dealer/retailer to have a
qualied technician do the work. SeeDoing
Your Own Service Work on page 386.
Some maintenance services can be complex. So,
unless you are technically qualied and have
the necessary equipment, you should have your
dealer/retailer do these jobs.
501

Engine
Air Cleaner/Filter...................................... 402
Check and Service Engine Soon Light..... 226
Coolant.................................................... 406
Coolant Heater......................................... 127
Coolant Temperature Gage...................... 225
Coolant Temperature Warning Light.......... 224
Drive Belt Routing.................................... 513
Engine Compartment Overview................ 396
Exhaust................................................... 138
Oil ........................................................... 397
Oil Life System........................................ 400
Overheated Protection Operating Mode.... 412
Overheating............................................. 410
Running While Parked............................. 139
Starting.................................................... 126
Entry Lighting.............................................. 187
Event Data Recorders................................. 537
Extender, Safety Belt..................................... 47
Exterior Lamps............................................ 183
F
Filter
Engine Air Cleaner................................... 402
Finish Damage............................................ 486
Flashers, Hazard Warning........................... 172Flash-to-Pass.............................................. 176
Flat Tire...................................................... 457
Flat Tire, Changing...................................... 458
Flat Tire, Storing......................................... 472
Floor Mats................................................... 162
Fluid
Automatic Transmission............................ 404
Power Steering........................................ 419
Windshield Washer.................................. 420
Fog Lamp
Fog .......................................................... 186
Fog Lamp Light........................................... 230
Fuel............................................................ 387
Additives.................................................. 389
California Fuel.......................................... 388
Filling a Portable Fuel Container.............. 393
Filling Your Tank...................................... 390
Fuels in Foreign Countries....................... 390
Gage....................................................... 231
Gasoline Octane...................................... 388
Gasoline Specications............................ 388
Fuses
Fuses and Circuit Breakers...................... 490
Instrument Panel Fuse Block................... 490
Underhood Fuse Block............................. 493
Windshield Wiper..................................... 490
544

G
Gage
Engine Coolant Temperature.................... 225
Fuel......................................................... 231
Speedometer........................................... 216
Tachometer.............................................. 216
Voltmeter Gage........................................ 221
Garage Door Opener................................... 150
Gasoline
Octane..................................................... 388
Specications........................................... 388
Glove Box................................................... 161
GM Mobility Reimbursement Program.......... 523
H
Hazard Warning Flashers............................ 172
Head Restraints............................................ 17
Headlamp
Aiming..................................................... 431
Headlamps
Bulb Replacement.................................... 432
Daytime Running Lamps/Automatic
Headlamp System................................ 185Headlamps (cont.)
Delayed................................................... 184
Exterior Lamps......................................... 183
Flash-to-Pass........................................... 176
Halogen Bulbs......................................... 432
High Intensity Discharge (HID) Lighting.... 432
High/Low Beam Changer......................... 176
Head-Up Display (HUD).............................. 190
Heated Seats................................................ 12
Heater......................................................... 199
Heater......................................................... 203
Height Adjuster, Driver Seat.......................... 10
High Voltage Devices and Wiring................ 489
Highbeam On Light..................................... 230
Highway Hypnosis....................................... 353
Hill and Mountain Roads............................. 354
Hood
Checking Things Under............................ 394
Release................................................... 395
Horn............................................................ 173
How to Use This Manual................................ 4
How to Wear Safety Belts Properly............... 29
545