2004 CHEVROLET BLAZER service

Ignition Positions
With the key in the ignition, you can turn it to ve
different positions.
Notice:Lengthy operation of features such as the
radio in the accessory ignition position may drain
the battery and prevent your vehicle from starting.
Do not operate your vehicle in the accessory ignition
position for a long period of time.
A (ACCESSORY):This position lets you use things
like the radio and the windshield wipers when the
engine is off. Push in the key and turn it toward you.
Your steering wheel will remain locked, just as it
was before you inserted the key.{CAUTION:
On manual transmission vehicles, turning the
key to LOCK will lock the steering column and
result in a loss of ability to steer the vehicle.
This could cause a collision. If you need to
turn the engine off while the vehicle is moving,
turn the key only to OFF. Do not press the key
release button while the vehicle is moving.
Notice:Using a tool to force the key from the
ignition switch could cause damage or break the
key. Use the correct key and turn the key only with
your hand. Make sure the key is all the way in.
If it is, turn the steering wheel left and right while
you turn the key hard. If none of this works,
then your vehicle needs service.
B (LOCK):This position locks your ignition, steering
wheel and transmission. It’s a theft-deterrent feature.
You will only be able to remove your key when the
ignition is turned to LOCK.
2-19

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

HomeLink®, a combined universal transmitter and
receiver, provides a way to replace up to three
hand−held transmitters used to activate devices such as
gate operators, garage door openers, entry door
locks, security systems and home lighting. Additional
HomeLink information can be found on the internet
at www.homelink.com or by calling 1−800−355−3515.If your vehicle is equipped with the HomeLink
®
Transmitter, it complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this
device must accept any interference, including
interference that may cause undesired operation of
the device.
Changes and modications to this system by other than
an authorized service facility could void authorization
to use this equipment. Full-Size Overhead Console
2-45

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

Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows the air bag symbol. The system
checks the air bag’s electrical system for malfunctions.
The light tells you if there is an electrical problem.
The system check includes the air bag sensors, the air
bag modules, the wiring and the crash sensing and
diagnostic module. For more information on the air bag
system, see “Air Bag Systems” in the Index.
This light will come on
when you start your
vehicle, and it will ash for
a few seconds. Then
the light should go out.
This means the system
is ready.
If the air bag readiness light stays on after you start the
vehicle or comes on when you are driving, your air
bag system may not work properly. Have your vehicle
serviced right away.{CAUTION:
If the air bag readiness light stays on after you
start your vehicle, it means the air bag system
may not be working properly. The air bags in
your vehicle may not inate in a crash, or they
could even inate without a crash. To help
avoid injury to yourself or others, have your
vehicle serviced right away if the air bag
readiness light stays on after you start your
vehicle.
The air bag readiness light should ash for a few
seconds when you turn the ignition key to RUN. If the
light doesn’t come on then, have it xed so it will
be ready to warn you if there is a problem.
3-25

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