2003 CHEVROLET TRAIL BLAZER fuel additives

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............................................5-4
Gasoline Speci®cations....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-6
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood....................5-10
Hood Release..............................................5-10
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-16
Engine Air Cleaner/Filter................................5-20
Automatic Transmission Fluid.........................5-22
Engine Coolant.............................................5-24
Radiator Pressure Cap..................................5-26
Engine Overheating.......................................5-27
Cooling System............................................5-29
Engine Fan Noise.........................................5-35Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-37
Brakes........................................................5-38
Battery........................................................5-41
Jump Starting...............................................5-42
Rear Axle.......................................................5-47
Four-Wheel Drive............................................5-48
Bulb Replacement..........................................5-50
Taillamps and Turn Signal Lamps...................5-50
Replacement Bulbs.......................................5-51
Windshield Wiper Blade Replacement..............5-51
Tires..............................................................5-54
In¯ation - Tire Pressure.................................5-54
Tire Inspection and Rotation...........................5-55
When It Is Time for New Tires.......................5-57
Buying New Tires.........................................5-58
Uniform Tire Quality Grading..........................5-59
Wheel Alignment and Tire Balance..................5-60
Wheel Replacement......................................5-61
Tire Chains..................................................5-62
If a Tire Goes Flat........................................5-63
Changing a Flat Tire.....................................5-64
Section 5 Service and Appearance Care
5-1

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. 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
speci®cations 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.
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.
5-6

As in the chart shown previously, SAE 5W-30 is the
only viscosity grade recommended for your vehicle. You
should look for and use only oils which have the API
Starburst symbol and which are also identi®ed as
SAE 5W-30. If you cannot ®nd such SAE 5W-30 oils,
you can use an SAE 10W-30 oil which has the API
Starburst symbol, if it's going to be 0ÉF (-18ÉC)
or above. Do not use other viscosity grade oils, such as
SAE 10W-40 or SAE 20W-50 under any conditions.
Notice:Use only engine oil with the American
Petroleum Institute Certi®ed For Gasoline Engines
starburst symbol. Failure to use the recommended
oil can result in engine damage not covered by
your warranty.
GM Goodwrench
žoil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
temperature falls below-20ÉF (-29ÉC), 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
Don't add anything to your oil. The recommended oils
with the starburst symbol 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 ENG OIL light 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. 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.
5-19

A
Accessory Power Outlets.................................3-20
Adding a Snow Plow or Similar Equipment.........4-50
Adding Washer Fluid.......................................5-37
Additional Program Information........................... 7-8
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-88
Adjusting the Speakers
(Balance/Fade)............................3-67, 3-75, 3-84
After Off-Road Driving.....................................4-28
Air Bag Systems.............................................1-49
How Does an Air Bag Restrain?....................1-56
Servicing Your Air Bag-Equipped Vehicle.........1-59
What Makes an Air Bag In¯ate?....................1-56
What Will You See After an Air
Bag In¯ates?...........................................1-57
When Should an Air Bag In¯ate?...................1-55
Where Are the Air Bags?..............................1-52
Air Bag .........................................................3-38
Readiness Light..........................................3-38
Air Cleaner/Filter, Engine.................................5-20
AM .............................................................3-106
Antenna, Fixed Mast......................................3-108
Anti-Lock Brake, System Warning Light..............3-42
Anti-lock Brake System..................................... 4-7
Appearance Care............................................5-79
Care of Safety Belts....................................5-82
Chemical Paint Spotting...............................5-85
Cleaning the Inside of Your Vehicle................5-79Appearance Care (cont.)
Cleaning the Outside of Your Vehicle..............5-82
Finish Damage............................................5-85
Sheet Metal Damage...................................5-84
Underbody Maintenance...............................5-85
Vehicle Care/Appearance Materials................5-86
Weatherstrips..............................................5-82
Approaching a Hill..........................................4-20
Ashtrays........................................................3-20
Audio Speakers..............................................3-94
Audio System(s).............................................3-64
Audio Steering Wheel Controls....................3-106
Care of Your Cassette Tape Player...............3-107
Care of Your CD and DVD Player................3-108
Care of Your CDs and DVDs.......................3-108
Chime Level Adjustment.............................3-108
Fixed Mast Antenna...................................3-108
Audio Systems..............................................3-105
Radio Personalization.................................3-105
Audio System(s).............................................3-72
Radio with Cassette and CD.........................3-72
Radio with CD............................................3-65
Radio with Six-Disc CD................................3-82
Rear Seat Audio (RSA)...............................3-104
Setting the Time..........................................3-64
Theft-Deterrent Feature...............................3-105
Understanding Radio Reception...................3-106
Automatic Headlamp System............................3-16
Automatic Transfer Case..................................2-25
Automatic Transmission Check..........................6-12
1

F
Filter.............................................................5-20
Engine Air Cleaner......................................5-20
Finding a PTY Station.....................3-68, 3-76, 3-85
Finding a Station............................3-66, 3-73, 3-83
Finish Care....................................................5-83
Finish Damage...............................................5-85
Fixed Mast Antenna.......................................3-108
Flash-to-Pass................................................... 3-9
Flat Tire, Changing.........................................5-64
Flat Tire........................................................5-63
Fluid.............................................................5-22
Automatic Transmission................................5-22
Power Steering...........................................5-36
Windshield Washer......................................5-37
FM ..............................................................3-106
Fog Lamps....................................................3-17
Following Distance..........................................4-57
Footnotes........................................................ 6-5
Four-Wheel Drive....................................2-24, 5-48
Front Axle......................................................5-49
Front Storage Area.........................................2-44
Fuel Information..............................................3-53
FUEL LEVEL LOW.........................................3-62
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-7
Fuels in Foreign Countries.............................. 5-6Fuel (cont.)
Gage.........................................................3-50
Gasoline Octane........................................... 5-4
Gasoline Speci®cations.................................. 5-5
Low Warning Light.......................................3-51
System Inspection.......................................6-16
Fuses...........................................................5-89
Fuses and Circuit Breakers...........................5-89
Windshield Wiper.........................................5-88
G
Gage............................................................3-49
Check Gages Warning Light..........................3-49
Engine Coolant Temperature.........................3-42
Fuel..........................................................3-50
Oil Pressure...............................................3-46
Speedometer..............................................3-37
Tachometer.................................................3-38
Voltmeter Gage...........................................3-40
Garage Door Opener.......................................2-39
Gasoline......................................................... 5-4
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Gate Ajar Light...............................................3-50
Gate Operator and Canadian Programming........2-42
Getting Familiar with Off-Road Driving................4-17
Glove Box.....................................................2-43
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
6