2004 CHEVROLET BLAZER service indicator

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
............................................... 1-6
Safety Belts
.............................................. 1-8
Child Restraints
.......................................1-31
Air Bag System
.......................................1-52
Restraint System Check
............................1-59
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
....................................... 2-7
Windows
.................................................2-11
Theft-Deterrent Systems
............................2-16
Starting and Operating Your Vehicle
...........2-18
Mirrors
....................................................2-42
HomeLink
®Transmitter
.............................2-44
Storage Areas
.........................................2-49
Sunroof
..................................................2-62
Vehicle Personalization
.............................2-64
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-2
Climate Controls
......................................3-17
Warning Lights, Gages, and Indicators
........3-21
Audio System(s)
.......................................3-37Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-46
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under the Hood
...............5-10
Rear Axle
...............................................5-47
Four-Wheel Drive
.....................................5-48
Front Axle
...............................................5-49
Bulb Replacement
....................................5-50
Windshield Wiper Blade Replacement
.........5-55
Tires
......................................................5-57
Appearance Care
.....................................5-89
Vehicle Identication
.................................5-97
Electrical System
......................................5-98
Capacities and Specications
...................5-103
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance and Information.............. 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-10
Index................................................................ 1
2004 Chevrolet Blazer Owner ManualM

Electronic Transfer Case
If your four-wheel-drive
vehicle has the
electronic transfer case,
the transfer case buttons
are to the right of the
steering wheel on
the instrument panel.
Use these buttons to shift into and out of four-wheel-drive.
You can choose among three driving settings:
2HI (Two-Wheel High):This setting is for driving in
most street and highway situations. Your front axle is not
engaged in two-wheel drive. When this lamp is lit, it is
about one-half as bright as the others.
4HI (Four-Wheel High):This setting engages your
front axle to help drive your vehicle. Use 4HI when you
need extra traction, such as on snowy or icy roads,
or in most off-road situations.4LO (Four-Wheel Low):This setting also engages
your front axle to give you extra traction. You may never
need 4LO. It sends the maximum power to all four
wheels. You might choose 4LO if you were driving
off-road in sand, mud or deep snow and climbing
or descending steep hills.
Indicator lights in the buttons show you which setting
you are in. The indicator lights will come on briey when
you turn on the ignition and one will stay on. If the
lights do not come on, you should take your vehicle in
for service. An indicator light will ash while shifting.
It will remain illuminated when the shift is completed.
Shifting from 2HI to 4HI
Press and release the 4HI button. This can be done at
any speed, and the front axle will lock automatically.
Shifting from 4HI to 2HI
Press and release the 2HI button. This can be done at
any speed, and the front axle will unlock automatically.
2-29

Shifting from 2HI or 4HI to 4LO
To shift from 2HI or 4HI to 4LO, the vehicle must be
stopped or moving less than 3 mph (4.8 km/h) with the
transmission in NEUTRAL (N) in vehicles equipped
with an automatic transmission or the clutch pedal
engaged in vehicles equipped with a manual
transmission. The preferred method for shifting into
4LO is to have your vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Press and release the 4LO button.
You must wait for the 4LO indicator light to stop ashing
and remain illuminated before shifting your transmission
into gear or releasing the clutch pedal.
If the 4LO button is pressed when your vehicle is in
gear and/or moving, the 4LO indicator light will ash for
30 seconds and not complete the shift unless your
vehicle is moving slower than 3 mph (4.8 km/h) and the
transmission is in NEUTRAL (N) or the clutch pedal
engaged.
On automatic transmission equipped vehicles, if your
transfer case does not shift into 4LO, your transmission
indicator switch may require adjustment. With your
transmission in NEUTRAL (N), press and release the
4LO button. While the 4LO indicator light is ashing,
shift your transmission into PARK (P). Wait until the
4LO indicator light remains illuminated before shifting
your transmission into gear. This will get you into
4LO, but you should take your vehicle in for service to
restore normal operation.
Shifting from 4LO to 4HI or 2HI
To shift from 4LO to 4HI or 2HI, your vehicle must be
stopped or moving less than 3 mph (4.8 km/h) with the
transmission in NEUTRAL (N) or the clutch pedal
engaged. The preferred method for shifting out of 4LO is
to have your vehicle moving 1 to 2 mph (1.6 to 3.2 km/h).
Press and release the 4HI button. You must wait for the
4HI indicator light to stop ashing and remain illuminated
before shifting your transmission into gear or releasing
the clutch pedal.
If the 4HI button is pressed when your vehicle is in
gear and/or moving, the 4HI indicator light will ash for
30 seconds but not complete the shift unless the vehicle
is moving slower than 3 mph (4.8 km/h) and the
transmission is in NEUTRAL (N) or the clutch pedal
engaged.
On automatic transmission equipped vehicles, if your
transfer case does not shift into 4HI, your transmission
indicator switch may require adjustment. With your
transmission in NEUTRAL (N), press and release the
4HI button. While the 4HI indicator light is ashing, shift
your transmission into PARK (P). Wait until the 4HI
indicator light remains illuminated before shifting your
transmission into gear. This will get you into 4HI, but you
should take your vehicle in for service to restore
normal operation.
2-30

{CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). You or someone
else could be seriously injured. Be sure to set
the parking brake before placing the transfer
case in NEUTRAL. SeeParking Brake on
page 2-35.
NEUTRAL:Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-46orTowing
Your Vehicle on page 4-46for more information.
Indicator lights in the buttons show which setting you
are in. The indicator lights will come on briey when you
turn on the ignition and one will stay on. If the lights
do not come on, you should take your vehicle to yourdealer for service. An indicator light will ash while
shifting the transfer case. It will remain illuminated when
the shift is complete. If for some reason the transfer
case cannot make a requested shift, it will return to the
last chosen setting.
If the SERVICE 4WD light stays on, you should take
your vehicle to your dealer for service. SeeService
Four-Wheel Drive Warning Light on page 3-34for
further information.
Shifting to 4HI or AUTO 4WD
Press and release the 4HI or AUTO 4WD button.
This can be done at any speed, and the indicator light
will ash while shifting. It will remain illuminated
when the shift is complete.
Shifting to 2HI
Press and release the 2HI button. This can be done at
any speed.
2-32

Instrument Panel Overview...............................3-2
Hazard Warning Flashers................................3-4
Other Warning Devices...................................3-4
Horn.............................................................3-5
Tilt Wheel.....................................................3-5
Turn Signal/Multifunction Lever.........................3-5
Exterior Lamps.............................................3-12
Interior Lamps..............................................3-15
Ashtrays and Cigarette Lighter........................3-17
Climate Controls............................................3-17
Climate Control System.................................3-17
Outlet Adjustment.........................................3-20
Warning Lights, Gages, and Indicators............3-21
Instrument Panel Cluster................................3-22
Speedometer and Odometer...........................3-24
Trip Odometer..............................................3-24
Tachometer.................................................3-24
Safety Belt Reminder Light.............................3-24
Air Bag Readiness Light................................3-25
Charging System Light..................................3-26
Voltmeter Gage............................................3-26
Up-Shift Light...............................................3-27
Brake System Warning Light..........................3-28
Anti-Lock Brake System Warning Light.............3-29
Engine Coolant Temperature Gage..................3-29
Malfunction Indicator Lamp.............................3-30Oil Pressure Gage........................................3-33
Security Light...............................................3-34
Service Four-Wheel Drive
Warning Light...........................................3-34
Tow/Haul Mode Light....................................3-35
Check Gages Warning Light...........................3-35
Gate Ajar Light.............................................3-35
Fuel Gage...................................................3-36
Low Fuel Warning Light.................................3-36
Audio System(s).............................................3-37
Setting the Time for Radios without
Radio Data Systems (RDS)........................3-37
Setting the Time for Radios with Radio
Data Systems (RDS)..................................3-38
AM-FM Radio...............................................3-38
Radio with CD..............................................3-41
Radio with Cassette and CD..........................3-49
Radio with Six-Disc CD.................................3-60
Theft-Deterrent Feature (Non-RDS Radios).......3-72
Theft-Deterrent Feature (RDS Radios).............3-72
Radio Reception...........................................3-72
Care of Your Cassette Tape Player.................3-72
Care of Your CDs.........................................3-74
Care of Your CD Player................................3-74
Fixed Mast Antenna......................................3-74
Section 3 Instrument Panel
3-1

Readings in the low warning zone may occur when a
large number of electrical accessories are operating in
the vehicle and the engine is left at an idle for an
extended period. This condition is normal since the
charging system is not able to provide full power
at engine idle. As engine speeds are increased, this
condition should correct itself as higher engine speeds
allow the charging system to create maximum power.
You can only drive for a short time with the reading
in either warning zone. If you must drive, turn off
all unnecessary accessories.
Readings in either warning zone indicate a possible
problem in the electrical system. Have the vehicle
serviced as soon as possible.Up-Shift Light
You have the shift light if
you have a manual
transmission.
Shifting when the indicator light is on will help you get
the best fuel economy. See “Up–Shift Light” under
Manual Transmission Operation on page 2-26.
3-27

Malfunction Indicator Lamp
Service Engine Soon Light in the
United States or Check Engine Light in
Canada
Your vehicle is equipped with a computer which
monitors operation of the fuel, ignition, and emission
control systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions are at acceptable levels for the
life of the vehicle, helping to produce a cleaner
environment. The SERVICE ENGINE SOON or CHECKENGINE light comes on to indicate that there is a
problem and service is required. Malfunctions often will
be indicated by the system before any problem is
apparent. This may prevent more serious damage to
your vehicle. This system is also designed to assist your
service technician in correctly diagnosing any
malfunction.
Notice:If you keep driving your vehicle with this
light on, after a while, your emission controls
may not work as well, your fuel economy may not
be as good, and your engine may not run as
smoothly. This could lead to costly repairs that may
not be covered by your warranty.
Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system of
your vehicle or the replacement of the original tires
with other than those of the same Tire Performance
Criteria (TPC) can affect your vehicle’s emission
controls and may cause this light to come on.
Modications to these systems could lead to costly
repairs not covered by your warranty. This may
also result in a failure to pass a required Emission
Inspection/Maintenance test. United States
Canada
3-30

If this message appears on the display, the cassette
tape player needs to be cleaned. It will still play tapes,
but it should be cleaned as soon as possible to
prevent damage to the tapes and player. If there is a
reduction in sound quality, try a known good cassette to
see if the tape or the tape player is at fault. If this
other cassette has no improvement in sound quality,
clean the tape player.
For best results, use a scrubbing action, non-abrasive
cleaning cassette with pads which scrub the tape
head as the hubs of the cleaner cassette turn. The
recommended cleaning cassette is available through
your dealer.
When cleaning the cassette tape player with the
recommended non-abrasive cleaning cassette, it is
possible that the cassette may eject, because the cut
tape detection feature on the radio may recognize it as a
broken tape, in error. To prevent the cleaning cassette
from being ejected, use the following steps:
1. Turn the ignition on.
2. Turn the radio off.
3. Press and hold the TAPE DISC button for ve
seconds. READY will appear on the display and
the cassette symbol will ash for ve seconds.4. Insert the scrubbing action cleaning cassette.
5. Eject the cleaning cassette after the manufacturer’s
recommended cleaning time.
When the cleaning cassette has been ejected, the
cut tape detection feature will be active again.
A non-scrubbing action, wet-type cleaner which uses a
cassette with a fabric belt to clean the tape head
can be used. This type of cleaning cassette will not
eject on its own. A non-scrubbing action cleaner may not
clean as thoroughly as the scrubbing type cleaner.
The use of a non-scrubbing action, dry-type cleaning
cassette is not recommended.
After the player is cleaned, press and hold the eject
button for ve seconds to reset the CLEAN indicator.
The radio will display --- or CLEANED to show the
indicator was reset.
Cassettes are subject to wear and the sound quality
may degrade over time. Always make sure the cassette
tape is in good condition before the tape player is
serviced.
3-73