fuel additives CHEVROLET TAHOE 2004 2.G Owners Manual

Service............................................................5-3
Doing Your Own Service Work.........................5-3
Adding Equipment to the Outside
of Your Vehicle...........................................5-4
Fuel................................................................5-4
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-6
Additives.......................................................5-6
Fuel E-85 (85% Ethanol).................................5-7
Fuels in Foreign Countries...............................5-8
Filling Your Tank............................................5-9
Filling a Portable Fuel Container.....................5-11
Checking Things Under the Hood....................5-12
Hood Release..............................................5-12
Engine Compartment Overview.......................5-14
Engine Oil...................................................5-17
Engine Air Cleaner/Filter................................5-22
Automatic Transmission Fluid.........................5-24
Engine Coolant.............................................5-26
Coolant Surge Tank Pressure Cap..................5-29Engine Overheating.......................................5-29
Cooling System............................................5-32
Engine Fan Noise.........................................5-37
Power Steering Fluid.....................................5-38
Windshield Washer Fluid................................5-39
Brakes........................................................5-40
Battery........................................................5-44
Jump Starting...............................................5-44
All-Wheel Drive..............................................5-50
Rear Axle.......................................................5-51
Four-Wheel Drive............................................5-52
Front Axle......................................................5-53
Bulb Replacement..........................................5-54
Halogen Bulbs..............................................5-54
Headlamps..................................................5-54
Front Turn Signal, Sidemarker and Daytime
Running Lamps.........................................5-56
Side Identication Marker Lamps.....................5-57
Roof Marker Lamps......................................5-57
Taillamps.....................................................5-59
Replacement Bulbs.......................................5-60
Section 5 Service and Appearance Care
5-1

California Fuel
If your vehicle is certied to meet California Emission
Standards (see the underhood emission control label),
it is designed to operate on fuels that meet California
specications. 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 (seeMalfunction Indicator Lamp on page 3-50) and
your vehicle may fail a smog-check test. 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.
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. General Motors
recommends that you buy gasolines that are advertised
to help keep fuel injectors and intake valves clean.If your vehicle experiences problems due to dirty injectors
or valves, try a different brand of gasoline.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines may be available in
your area to contribute to clean air. General Motors
recommends that you use these gasolines, particularly if
they comply with the specications described earlier.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the 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 does
not recommend 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 authorized GM dealer for
service.
5-6

E-85 has less energy per gallon than gasoline, so
you will need to rell your fuel tank more often when
using E-85 than when you are using gasoline. Regular
unleaded gasoline is recommended when pulling a
trailer. For payload capacity with ethanol fuel, see
Loading Your Vehicle on page 4-58.
Notice:Some additives are not compatible with E-85
fuel and may harm your fuel system. Damage caused
by additives would not be covered by your new
vehicle warranty. Do not use additives with E-85 fuel.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage would not be covered under
your warranty.Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may 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.
5-8

Notice:Use only engine oil identied as meeting
GM Standard GM6094M and showing the American
Petroleum Institute Certied For Gasoline Engines
starburst symbol. Failure to use the recommended
oil can result in engine damage not covered by
your warranty.
GM Goodwrench
®oil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
temperature falls below−20°F (−29°C), it is
recommended that you use either an SAE 5W-30
synthetic oil or an SAE 0W-30 oil. Both will provide
easier cold starting and better protection for your
engine at extremely low temperatures.
Engine Oil Additives
Do not add anything to your oil. The recommended
oils with the starburst symbol that meet GM Standard
GM6094M are all you will need for good performance
and engine protection.
When to Change Engine Oil
(GM Oil Life System)
Your vehicle has a computer system that lets you know
when to change the engine oil and lter. This is based on
engine revolutions and engine temperature, and not on
mileage. Based on driving conditions, the mileage at
which an oil change will be indicated can vary
considerably. For the oil life system to work properly, you
must reset the system every time the oil is changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is necessary.
A CHANGE ENGINE OIL message will come on. Change
your oil as soon as possible within the next two times you
stop for fuel. It is possible that, if you are driving under the
best conditions, the oil life system may not indicate that
an oil change is necessary for over a year. However, your
engine oil and lter must be changed at least once a year
and at this time the system must be reset. Your dealer
has GM-trained service people who will perform this work
using genuine GM parts and reset the system. It is also
important to check your oil regularly and keep it at the
proper level.
If the system is ever reset accidentally, you must
change your oil at 3,000 miles (5 000 km) since your
last oil change. Remember to reset the oil life system
whenever the oil is changed.
5-20

A
Accessory Power Outlets.................................3-21
Adding Washer Fluid.......................................5-39
Additional Program Information........................... 7-9
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-110
Adjustable Throttle and Brake Pedal..................2-24
Adjusting the Speakers
(Balance/Fade)..................3-80, 3-84, 3-96, 3-111
After Off-Road Driving.....................................4-38
Air Bag
Passenger Status Indicator...........................3-42
Readiness Light..........................................3-42
Air Bag Systems.....................................1-74, 1-81
Adding Equipment to Your Air
Bag-Equipped Vehicle...............................1-89
How Does an Air Bag Restrain?....................1-82
Passenger Sensing System...........................1-84
Servicing Your Air Bag-Equipped Vehicle.........1-88
What Makes an Air Bag Inate?....................1-81
What Will You See After an Air
Bag Inates?...........................................1-82
When Should an Air Bag Inate?...................1-80
Where Are the Air Bags?..............................1-77
Air Cleaner/Filter, Engine.................................5-22
Air Conditioning..............................................3-31
Airbag Sensing and Diagnostic Module (SDM)...... 7-9
All-Wheel Drive...............................................5-50All-Wheel Drive with Stabilitrak
®........................2-35
AM .............................................................3-137
AM-FM Radio.................................................3-78
Antenna, Fixed Mast......................................3-139
Antenna, XM™ Satellite Radio
Antenna System........................................3-139
Anti-lock Brake System..................................... 4-7
Anti-Lock Brake, System Warning Light..............3-46
Appearance Care..........................................5-100
Care of Safety Belts...................................5-103
Chemical Paint Spotting..............................5-107
Cleaning the Inside of Your Vehicle..............5-101
Cleaning the Outside of Your Vehicle............5-104
Finish Damage..........................................5-107
Sheet Metal Damage..................................5-106
Underbody Maintenance.............................5-107
Vehicle Care/Appearance Materials...............5-108
Weatherstrips............................................5-103
Approaching a Hill..........................................4-30
Ashtrays........................................................3-21
Audio Output................................................3-125
Audio System(s).............................................3-76
AM-FM Radio.............................................3-78
Audio Steering Wheel Controls....................3-136
Care of Your Cassette Tape Player...............3-137
Care of Your CD and DVD Player................3-138
Care of Your CDs and DVDs.......................3-138
Chime Level Adjustment.............................3-139
Fixed Mast Antenna...................................3-139
1

Finish Damage.............................................5-107
Fixed Mast Antenna.......................................3-139
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-80
Flat Tire, Changing.........................................5-80
Fluid
Automatic Transmission................................5-24
Power Steering...........................................5-38
Windshield Washer......................................5-39
FM Stereo....................................................3-137
Fog Lamps....................................................3-17
Folding the Seatback.......................................1-18
Folding the Seatbacks.....................1-11, 1-13, 1-23
Following Distance..........................................4-75
Four-Wheel Drive....................................2-30, 5-52
Four-Wheel-Drive Light....................................3-54
Front Axle......................................................5-53
Front Axle Locking Feature...............................2-30
Front Reading Lamps......................................3-19
Front Storage Area.........................................2-63
Frontal Air Bags.............................................1-80
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-6
E-85 (85% Ethanol)....................................... 5-7
Filling a Portable Fuel Container....................5-11
Filling Your Tank........................................... 5-9
Fuels in Foreign Countries.............................. 5-8
Gage.........................................................3-55Fuel (cont.)
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-5
Low Warning Light.......................................3-55
Fuel Information Button....................................3-59
FUEL LEVEL LOW.........................................3-71
Fuses
Fuses and Circuit Breakers.........................5-110
Windshield Wiper.......................................5-110
G
Gage
Engine Coolant Temperature.........................3-47
Fuel..........................................................3-55
Oil Pressure...............................................3-53
Speedometer..............................................3-41
Tachometer.................................................3-41
Transmission Temperature.............................3-48
Voltmeter Gage...........................................3-44
Garage Door Opener.......................................2-58
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
Gate Operator and Canadian Programming........2-61
Getting Familiar with Off-Road Driving................4-28
Glove Box.....................................................2-63
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
7