2007 CHEVROLET COLORADO fuel additives

Service........................................................ 324
Accessories and Modications................... 324
California Proposition 65 Warning.............. 324
Doing Your Own Service Work.................. 325
Adding Equipment to the
Outside of Your Vehicle......................... 325
Fuel............................................................. 326
Gasoline Octane........................................ 326
Gasoline Specications.............................. 326
California Fuel........................................... 326
Additives................................................... 326
Fuels in Foreign Countries........................ 327
Filling the Tank......................................... 328
Filling a Portable Fuel Container............... 330
Checking Things Under the Hood.............. 331
Hood Release........................................... 331
Engine Compartment Overview.................. 332
Engine Oil................................................. 333
Engine Oil Life System.............................. 336Engine Air Cleaner/Filter............................ 338
Automatic Transmission Fluid.................... 339
Manual Transmission Fluid........................ 342
Hydraulic Clutch........................................ 344
Engine Coolant.......................................... 345
Radiator Pressure Cap.............................. 348
Engine Overheating................................... 348
Cooling System......................................... 350
Engine Fan Noise..................................... 355
Power Steering Fluid................................. 355
Windshield Washer Fluid........................... 356
Brakes...................................................... 357
Battery...................................................... 361
Jump Starting............................................ 362
Rear Axle.................................................... 368
Four-Wheel Drive........................................ 368
Front Axle................................................... 369
Section 5 Service and Appearance Care
321

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.
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 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. See
Additives on page 326for 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 192. 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.
326

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.
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.
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 your 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.
327

A
Accessories and Modications..................... 324
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................... 95
Additives, Fuel............................................ 326
Add-On Electrical Equipment....................... 432
Air Cleaner/Filter, Engine............................. 338
Air Conditioning........................................... 177
Airbag
Passenger Status Indicator....................... 186
Readiness Light....................................... 185
Airbag System............................................... 77
What Will You See After an
Airbag Inates?...................................... 86
When Should an Airbag Inate?................. 83
Where Are the Airbags?............................. 80
Airbag Systems
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 95
How Does an Airbag Restrain?.................. 85
Passenger Sensing System....................... 88
Servicing Your Airbag-Equipped Vehicle..... 94
What Makes an Airbag Inate?.................. 85
AM-FM Radio.............................................. 209
Antenna, Fixed Mast................................... 244Antenna, XM™ Satellite Radio Antenna
System.................................................... 244
Anti-Lock Brake System.............................. 251
Anti-Lock Brake, System Warning Light....... 190
Appearance Care
Aluminum or Chrome-Plated Wheels........ 428
Care of Safety Belts................................ 425
Chemical Paint Spotting........................... 430
Cleaning Exterior Lamps/Lenses.............. 426
Cleaning the Inside of Your Vehicle.......... 422
Fabric/Carpet........................................... 423
Finish Care.............................................. 426
Finish Damage......................................... 429
Instrument Panel, Vinyl, and
Other Plastic Surfaces.......................... 425
Leather.................................................... 424
Sheet Metal Damage............................... 429
Tires........................................................ 429
Underbody Maintenance........................... 430
Vehicle Care/Appearance Materials.......... 431
Washing Your Vehicle.............................. 426
Weatherstrips........................................... 425
Windshield and Wiper Blades................... 427
Ashtray....................................................... 177
Assist Handles............................................ 154
481

Event Data Recorders................................. 479
Exit Lighting................................................ 175
Extender, Safety Belt..................................... 43
Exterior Cargo Lamps................................. 174
Exterior Lamps............................................ 170
F
Filter
Engine Air Cleaner................................... 338
Finish Damage............................................ 429
Fixed Mast Antenna.................................... 244
Flashers, Hazard Warning........................... 162
Flash-to-Pass.............................................. 165
Flat Tire...................................................... 399
Flat Tire, Changing...................................... 400
Flat Tire, Storing......................................... 416
Fluid
Automatic Transmission............................ 339
Manual Transmission................................ 342
Power Steering........................................ 355
Windshield Washer.................................. 356Fog Lamp
Fog .......................................................... 173
Four-Wheel Drive...............................129, 368
Front Armrest Storage Area ......................... 154
Front Axle................................................... 369
Front Turn Signal, Parking and
Daytime Running Lamps.......................... 372
Fuel............................................................ 326
Additives.................................................. 326
California Fuel.......................................... 326
Filling a Portable Fuel Container.............. 330
Filling Your Tank...................................... 328
Fuels in Foreign Countries....................... 327
Gage....................................................... 197
Gasoline Octane...................................... 326
Gasoline Specications............................ 326
Fuses
Engine Compartment Fuse Block............. 433
Fuses and Circuit Breakers...................... 433
Windshield Wiper..................................... 433
486