2004 CHEVROLET TRAIL BLAZER service indicator

Gasoline Octane
Use regular unleaded gasoline with a posted octane
of 87 or higher. If the octane is less than 87, you may
get 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 might damage
your engine. A little pinging noise when you accelerate
or drive uphill is considered normal. This does not
indicate a problem exists or that a higher-octane fuel is
necessary. If you are using 87 octane or higher-octane
fuel and hear heavy knocking, your engine needs
service.
Gasoline Specications
It is recommended that gasoline meet specications
which were developed by automobile manufacturers
around the world and contained in the World-Wide Fuel
Charter which is available from the Alliance of
Automobile Manufacturers at
www.autoalliance.org/fuel_charter.htm. Gasoline
meeting these specications could provide improved
driveability and emission control system performance
compared to other gasoline.In Canada, look for the
“Auto Makers’ Choice”
label on the pump.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 3-40) 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.Canada Only
5-5

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.
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

Brake Wear
Your vehicle has four-wheel disc brakes.
Disc brake pads have built-in wear indicators that make
a high-pitched warning sound when the brake pads
are worn and new pads are needed. The sound
may come and go or be heard all the time your vehicle
is moving (except when you are pushing on the
brake pedal rmly).
{CAUTION:
The brake wear warning sound means that
soon your brakes will not work well. That
could lead to an accident. When you hear the
brake wear warning sound, have your vehicle
serviced.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.Some driving conditions or climates may cause a brake
squeal when the brakes are rst applied or lightly
applied. This does not mean something is wrong with
your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly tighten wheel nuts in
the proper sequence to GM torque specications.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in
pedal travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
5-39

J
Jump Starting.................................................5-41
K
Keyless Entry System....................................... 2-5
Keys............................................................... 2-3
L
Lamps
Exterior......................................................3-15
Interior.......................................................3-17
Lamps On Reminder.......................................3-16
Lap-Shoulder Belt...................................1-14, 1-22
LATCH System
Child Restraints...........................................1-38
Securing a Child Restraint Designed for
the LATCH System...................................1-40
Leaving Your Vehicle.......................................2-12
Leaving Your Vehicle With the
Engine Running..........................................2-30
LEFT REAR DOOR AJAR................................3-60
Liftgate Rack System
Table.........................................................2-48
Liftgate Release..............................................2-13
Liftgate/Liftglass..............................................2-13
Liftglass/Liftgate..............................................2-13Light
Air Bag Readiness.......................................3-35
Anti-Lock Brake System Warning...................3-39
Brake System Warning.................................3-38
Change Engine Oil......................................3-44
Charging System.........................................3-36
Check Gages Warning.................................3-46
Cruise Control.............................................3-45
Gate Ajar...................................................3-47
Low Fuel Warning.......................................3-48
Malfunction Indicator....................................3-40
Reduced Engine Power................................3-45
Safety Belt Reminder...................................3-35
Security.....................................................3-44
Service Four-Wheel-Drive Warning Light.........3-46
Lighted Visor Vanity Mirror...............................2-15
Listening to a DVD.................................3-86, 3-99
Loading Your Vehicle.......................................4-47
Loading Your Vehicle for Off-Road Driving..........4-16
Locking Rear Axle...........................................4-10
Lockout Protection..........................................2-12
Locks
Delayed Locking........................................... 2-9
Door........................................................... 2-8
Leaving Your Vehicle....................................2-12
Lockout Protection.......................................2-12
Power Door.................................................. 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-14
8

Low Fuel Warning Light...................................3-48
Luggage Carrier..............................................2-44
Lumbar
Manual Controls............................................ 1-3
Power Controls............................................. 1-3
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month.................................. 6-9
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7
Maintenance Record....................................6-16
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-14
Owner Checks and Services........................... 6-9
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using Your................................................... 6-3
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-62
Making Turns.................................................4-60
Malfunction Indicator Light................................3-40
Manual Lumbar Controls.................................... 1-3
Manual Seats................................................... 1-2
Matching Transmitter(s) to Your Vehicle............... 2-6Memory Seat.................................................2-50
Message
DIC Warnings and Messages........................3-57
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands) – Customer Assistance....................... 7-5
Mirror Operation.............................................2-34
Mirrors
Automatic Dimming Rearview with OnStar®
and Compass..........................................2-34
Outside Convex Mirror.................................2-37
Outside Curb View Assist Mirrors...................2-36
Outside Heated Mirrors................................2-37
Outside Manual Mirrors................................2-35
Outside Power Mirrors..................................2-36
MyGMLink.com................................................ 7-3
N
Navigation/Radio System..................................3-99
New Vehicle Break-In......................................2-18
Normal Maintenance Replacement Parts............6-14
O
Odometer......................................................3-34
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-44
9

U
Understanding Radio Reception.......................3-114
Uniform Tire Quality Grading............................5-64
United States – Customer Assistance.................. 7-4
Used Replacement Wheels..............................5-66
Using Cleaner on Fabric..................................5-84
Using HomeLink
®...........................................2-41
Using Song List Mode.....................................3-97
Using the Recovery Hooks...............................4-43
V
Vehicle
Control........................................................ 4-5
Damage Warnings........................................... iv
Loading......................................................4-47
Symbols......................................................... iv
Vehicle Data Collection and Event Data
Recorders.................................................... 7-9
Vehicle Identication
Number (VIN).............................................5-91
Service Parts Identication Label...................5-91
Vehicle Personalization
Memory Seat..............................................2-50
Vehicle Storage..............................................5-40
Video Screen................................................3-102Visor Vanity Mirror..........................................2-15
Visors...........................................................2-15
Voltmeter Gage..............................................3-37
W
Warning Lights, Gages and Indicators................3-32
Warnings
DIC Warnings and Messages........................3-57
Hazard Warning Flashers............................... 3-6
Other Warning Devices.................................. 3-6
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washing Your Vehicle......................................5-86
Weight Distributing Hitches and Weight
Carrying Hitches..........................................4-57
Weight of the Trailer........................................4-54
Weight of the Trailer Tongue.............................4-56
What Kind of Engine Oil to Use........................5-16
What to Add..................................................5-38
What to Do with Used Oil................................5-19
What to Use..........................5-24, 5-35, 5-36, 5-46
Wheels
Alignment and Tire Balance..........................5-65
Replacement...............................................5-65
When to Add Engine Oil..................................5-16
When to Change Engine Oil
(GM Oil Life System)...................................5-18
15