engine CHEVROLET TRAIL BLAZER 2005 1.G Service Manual

DIC Operation and Displays
The DIC comes on when the ignition is on. After a short
delay the DIC will display the information that was
last displayed before the engine was turned off.
If a problem is detected, a warning message will appear
on the display. Pressing the trip stem will acknowledge
any warning or service messages. Pressing any of
the DIC steering wheel buttons — trip information, fuel
information, customization, or select button — will
also acknowledge any warnings or service messages.
You should take any message that appears on the
display seriously and remember that clearing the
message will only make the message disappear, not
correct the problem.
The DIC has different modes which can be accessed by
pressing the four DIC buttons located on the steering
wheel. These buttons are trip information, fuel
information, customization, and select. The button
functions are detailed in the following pages.
Trip Information Button
3
(Trip Information):Press the trip information
button to scroll through the ODOMETER, TRIP A,
TRIP B, and TIMER.
Odometer:Press the trip information button until
ODOMETER appears on the display. This mode shows
the total distance the vehicle has been driven in
either miles or kilometers. Pressing the reset stem
located on the instrument cluster with the vehicle off will
also display the odometer.
Trip A:Press the trip information button until TRIP A
appears on the display. This mode shows the current
distance traveled since the last reset for TRIP A in either
miles or kilometers.
Trip B:Press the trip information button until TRIP B
appears on the display. This mode shows the current
distance traveled since the last reset for TRIP B in either
miles or kilometers.
To reset TRIP A or TRIP B information, press and hold
the select button for one second while in one of the
trip modes. This will reset the information for TRIP A or
TRIP B.
3-50

You can also reset the TRIP A or TRIP B while they are
displayed by pressing the reset stem on the cluster. If
you press and hold the reset stem or the select
button for four seconds, the display will show the
distance traveled since the last ignition cycle for TRIP A
or TRIP B.
Timer:The DIC can be used as a timer. Press the
select button while TIMER is displayed to start the timer.
The display will show the amount of time that has
passed since the timer was last reset, not including time
the ignition is off. Time will continue to be counted as
long as the ignition is on, even if another display is being
shown on the DIC. The timer will record up to 99 hours,
59 minutes and 59 seconds (99:59:59) after which
the display will roll back to zero.
To stop the counting of time, press the select button
briey while TIMER is displayed.
To reset the timer to zero, press and hold the select
button while TIMER is displayed.Fuel Information Button
t
(Fuel Information):Press the fuel information
button to scroll through the range, average fuel
economy, instant fuel economy, and the engine oil life
system.
Fuel Range:Press the fuel information button until
RANGE appears on the display. This mode shows the
remaining distance you can drive without refueling.
It is based on fuel economy and the fuel remaining in
the tank. The display will show LOW if the fuel level
is low.
The fuel economy data used to determine fuel range is
an average of recent driving conditions. As your
driving conditions change, this data is gradually updated.
Fuel range cannot be reset.
Fuel Used:Press the fuel information button until
FUEL USED appears on the display. This mode shows
the number of gallons or liters of fuel used since the
last reset of this menu item. To reset the fuel used
information, press and hold the select button for
one second while FUEL USED is displayed.
3-51

Average Fuel Economy:Press the fuel information
button until AVG. ECON appears on the display.
This mode shows how many miles per gallon (MPG),
liters per 100 kilometers (L/100 km), or kilometers
per liter (km/L) your vehicle is getting based on current
and past driving conditions.
Press and hold the select button for one second while
AVG. ECON is displayed to reset the average fuel
economy. Average fuel economy will then be calculated
starting from that point. If the average fuel economy is not
reset, it will be continually updated each time you drive.
Engine Oil Life System:Press the fuel information
button until ENGINE OIL LIFE appears on the display.
The engine oil life system shows an estimate of the oil’s
remaining useful life. It will show 100% when the
system is reset after an oil change. It will alert you to
change your oil on a schedule consistent with your
driving conditions.
Always reset the engine oil life system after an oil
change. To reset the engine oil life system, use the fuel
button to reach the ENGINE OIL LIFE screen and
then press and hold the select button for ve seconds
while ENGINE OIL LIFE is displayed. OIL LIFE
RESET will appear on the display for 10 seconds to let
you know the system is reset. SeeEngine Oil Life
System on page 5-18for more information.In addition to the engine oil life system monitoring the
oil life, additional maintenance is recommended in
the Maintenance Schedule in this manual. SeeEngine
Oil on page 5-15andScheduled Maintenance on
page 6-4.
Customization Button
4
(Customization):Press the customization button to
access the VEHICLE SETTINGS menu and customize
the settings to your vehicle. SeeDIC Vehicle
Customization on page 3-56for more information.
Select Button
r
(Select):Press the select button to reset certain
DIC functions, turn off or acknowledge messages
on the DIC display, and set your customization settings.
For example, this button will allow you to reset the
trip odometers, turn off the FUEL LEVEL LOW message,
and scroll through and select the desired language
information is displayed on the DIC.
3-52

ENGINE COOLANT HOT/ENGINE
OVERHEATED
If the cooling system temperature gets hot, this message
will appear in the DIC and you will hear a chime. See
Engine Overheating on page 5-26for the proper course
of action. This message will clear when the coolant
temperature drops to a safe operating temperature.
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If
an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon
as possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating on
page 5-26for more information.
FUEL LEVEL LOW
If the fuel level is low in the vehicle’s gas tank this
message will appear on the DIC and you will hear a
chime. Refuel as soon as possible. Press the select
button to acknowledge this message and clear it from
the DIC display. SeeLow Fuel Warning Light on
page 3-48,Filling the Tank on page 5-8andFuel on
page 5-5for more information.
ICE POSSIBLE
If the outside temperature reaches a level where ice
could form on the roadway, this message may appear
on the DIC. If the temperature rises to a safe level,
the message will clear. Press the select button to
acknowledge this message and clear it from the DIC
display.
KEY FOB # BATTERY LOW
If a remote keyless entry transmitter battery is low, this
message will appear on the DIC. The battery needs
to be replaced in the transmitter. See “Battery
Replacement” underRemote Keyless Entry System
Operation on page 2-6. Press the select button to
acknowledge this message and clear it from the DIC
display.
LEFT REAR DOOR AJAR
If the driver’s side rear door is not fully closed this
message will appear on the display and you will hear a
chime. Stop and turn off the vehicle, check the door
for obstacles, and close the door again. Check to see if
the message still appears on the DIC. Press the
select button to acknowledge this message and clear it
from the DIC display.
3-54

OIL PRESSURE LOW/STOP ENGINE
If low oil pressure levels occur, this message will
be displayed on the DIC. Stop the vehicle as soon as
safely possible and do not operate it until the cause
of the low oil pressure has been corrected. Check your
oil as soon as possible and have your vehicle serviced
by your GM dealer. SeeEngine Oil on page 5-15.
Notice:If you drive your vehicle while the engine
oil pressure is low, severe engine damage may
occur. If a low oil pressure warning appears on the
Driver Information Center (DIC), stop the vehicle
as soon as possible. Do not drive the vehicle until
the cause of the low oil pressure is corrected.
SeeEngine Oil on page 5-15for more information.
PASSENGER DOOR AJAR
If the passenger’s door is not fully closed, this message
will appear on the display and you will hear a chime.
Stop and turn off the vehicle, check the door for
obstacles, and close the door again. Check to see if the
message still appears on the DIC. Press the select
button to acknowledge this message and clear it from
the DIC display.
REAR ACCESS OPEN
If the liftgate or liftglass is open while the ignition is in
RUN, this message will appear on the DIC and you will
hear a chime. Turn off the vehicle and check the
liftgate and liftglass. SeeLiftgate/Liftglass on page 2-13.
Restart the vehicle and check for the message on the
DIC display. Press the select button to acknowledge this
message and clear it from the DIC display.
RIGHT REAR DOOR AJAR
If the passenger’s side rear door is not fully closed this
message will appear on the display and you will
hear a chime. Stop and turn off the vehicle, check the
door for obstacles, and close the door again. Check
to see if the message still appears on the DIC. Press the
select button to acknowledge this message and clear
it from the DIC display.
SERVICE AIR BAG
If there is a problem with the airbag system this
message will be displayed on the DIC. Have your
GM dealer inspect the system for problems. SeeAirbag
Readiness Light on page 3-35andAirbag System on
page 1-51for more information. Press the select button
to acknowledge this message and clear it from the
DIC display.
3-55

SERVICE BRAKE SYSTEM
If a problem occurs with the brake system this message
will appear on the DIC. If this message appears, stop
as soon as possible and turn off the vehicle. Restart the
vehicle and check for the message on the DIC display.
If the message is still displayed, or appears again when
you begin driving, the brake system needs service.
See your GM dealer.
TIGHTEN FUEL CAP
If the vehicle’s fuel cap is not tightened properly, this
message may appear on the DIC and a chime will
sound. Fully reinstall the fuel cap. SeeFilling the Tank
on page 5-8. The diagnostic system can determine
if the fuel cap has been left off or improperly installed.
A loose or missing fuel cap will allow fuel to evaporate
into the atmosphere. The DIC message will remain
on until the message is cancelled with the return button
on the steering wheel. The DIC message will also be
cancelled if the ignition is turned off.
The DIC message and the Service Engine Soon light
may come on again during a second trip if the fuel cap is
still not tightened properly. SeeMalfunction Indicator
Lamp on page 3-41for more information.
TURN SIGNAL ON
If a turn signal is left on for 3/4 of a mile (1.2 km), this
message will appear on the display and you will hear a
chime. Move the turn signal/multifunction lever to the
off position. Press the select button to acknowledge this
message and clear it from the DIC display.
DIC Vehicle Customization
Your vehicle may have customization capabilities that
allow you to program some features to one setting
based on your preference. All of the customizable
options listed may not be available on your vehicle. Only
the options available will be displayed on your Driver
Information Center (DIC).
The default settings for the customization features were
set when your vehicle left the factory, but may have
been changed from their default state since then.
To change feature preferences, make sure the ignition
is on and the vehicle is in PARK (P).
Press the customization button to scroll through the
available customizable options.
After pressing the customization button, VEHICLE
SETTINGS will momentarily display before going to a
customization option.
3-56

Audio System(s)
Notice:Before adding any sound equipment to
your vehicle, such as an audio system, CD player,
CB radio, mobile telephone, or two-way radio, make
sure that it can be added by checking with your
dealer. Also, check federal rules covering mobile
radio and telephone units. If sound equipment can
be added, it is very important to do it properly.
Added sound equipment may interfere with
the operation of your vehicle’s engine, radio, or
other systems, and even damage them. Your
vehicle’s systems may interfere with the operation
of sound equipment that has been added.
Notice:The chime signals related to seat belts,
parking brake, and other functions of your vehicle
operate through the GM radio/entertainment system.
If that equipment is replaced or additional
equipment is added to your vehicle, the chimes may
not work. Make sure that replacement or additional
equipment is compatible with your vehicle before
installing it.
Figure out which audio system is in your vehicle, nd
out what your audio system can do, and how to operate
all of its controls.Your vehicle has a feature called Retained Accessory
Power (RAP). With RAP, the audio system can be played
even after the ignition is turned off. SeeRetained
Accessory Power (RAP) on page 2-20for more
information.
Setting the Time
The radio may have a button marked with an H or HR to
represent hours and an M or MN to represent minutes.
Press and hold the hour button until the correct hour
appears on the display. AM or PM will appear on
the display for morning or evening hours. Press and
hold the minute button until the correct minute appears
on the display. The time can be set with the ignition
on or off.
To synchronize the time with an FM station broadcasting
Radio Data System (RDS) information, press and
hold the hour and minute buttons at the same time for
two seconds until UPDATED and the clock symbol
appear on the display. If the time is not available from
the station, NO UPDAT will appear on the display.
RDS time is broadcast once a minute. After tuning to an
RDS broadcast station, it may take a few minutes for
the time to update.
3-62

Control of a Vehicle
You have three systems that make your vehicle go where
you want it to go. They are the brakes, the steering, and
the accelerator. All three systems have to do their work at
the places where the tires meet the road.
Sometimes, as when you are driving on snow or ice,
it is easy to ask more of those control systems than the
tires and road can provide. That means you can lose
control of your vehicle.
Braking
Braking action involves perception time and
reaction time.
First, you have to decide to push on the brake pedal.
That is perception time. Then you have to bring up your
foot and do it. That is reaction time.
Average reaction time is about three-fourths of a
second. But that is only an average. It might be less
with one driver and as long as two or three seconds or
more with another. Age, physical condition, alertness,
coordination, and eyesight all play a part. So do alcohol,
drugs, and frustration. But even in three-fourths of a
second, a vehicle moving at 60 mph (100 km/h) travels
66 feet (20 m). That could be a lot of distance in an
emergency, so keeping enough space between
your vehicle and others is important.And, of course, actual stopping distances vary greatly
with the surface of the road, whether it is pavement
or gravel; the condition of the road, whether it is
wet, dry, or icy; tire tread; the condition of your brakes;
the weight of the vehicle; and the amount of brake
force applied.
Avoid needless heavy braking. Some people drive
in spurts — heavy acceleration followed by heavy
braking — rather than keeping pace with traffic. This is
a mistake. Your brakes may not have time to cool
between hard stops. Your brakes will wear out much
faster if you do a lot of heavy braking. If you keep pace
with the traffic and allow realistic following distances,
you will eliminate a lot of unnecessary braking.
That means better braking and longer brake life.
If your engine ever stops while you are driving, brake
normally but do not pump your brakes. If you do,
the pedal may get harder to push down. If your engine
stops, you will still have some power brake assist.
But you will use it when you brake. Once the power
assist is used up, it may take longer to stop and
the brake pedal will be harder to push.
4-5

Anti-Lock Brake System (ABS)
Your vehicle has anti-lock brakes. ABS is an advanced
electronic braking system that will help prevent a
braking skid.
When you start your engine and begin to drive away,
your anti-lock brake system will check itself. You
may hear a momentary motor or clicking noise while
this test is going on. This is normal.
If there is a problem with
the anti-lock brake system,
this warning light will
stay on. SeeAnti-Lock
Brake System Warning
Light on page 3-40.
Along with ABS, your vehicle has a Dynamic Rear
Proportioning (DRP) system. If there is a DRP problem,
both the brake and ABS warning lights will come on
accompanied by a 10-second chime. The lights and
chime will come on each time the ignition is turned on
until the problem is repaired. See your dealer for service.Let us say the road is wet and you are driving safely.
Suddenly, an animal jumps out in front of you. You slam
on the brakes and continue braking. Here is what
happens with ABS:
A computer senses that wheels are slowing down. If
one of the wheels is about to stop rolling, the computer
will separately work the brakes at each front wheel
and at both rear wheels.
4-6

Traction Assist System (TAS)
Your two-wheel drive vehicle may have a Traction
Assist System (TAS) that limits wheel spin. This
is especially useful in slippery road conditions. The
system operates only if it senses that one or both of the
rear wheels are spinning or beginning to lose traction.
When this happens, the system reduces engine
power to limit wheel spin.
The low traction symbol next to the button will come on
when the TAS is limiting wheel spin. You may feel or
hear the system working, but this is normal.
The Traction Assist System may operate on dry roads
under some conditions. When this happens, you
may notice a reduction in acceleration. This is normal
and doesn’t mean there’s a problem with your vehicle.
Examples of these conditions include a hard
acceleration in a turn, an abrupt upshift or downshift of
the transmission or driving on rough roads.
If your vehicle is in cruise control when the TAS begins
to limit wheel spin, the cruise control will automatically
disengage. When road conditions allow you to safely
use it again, you may re-engage the cruise control. See
Cruise Control on page 3-11.When the traction control
off symbol on the button is
on, the TAS is off and
will not limit wheel
spin. Adjust your driving
accordingly.
The traction control off symbol on the button will come
on under the following conditions:
The Traction Assist System is turned off, either by
pressing the on/off button or by turning off the
automatic engagement feature of the TAS.
The transmission is in FIRST (1) gear; TAS will not
operate in this gear. This is normal.
The vehicle is driven on an extremely rough road.
When the vehicle leaves the rough surface, slows
down or stops, the light will go off and TAS will
be on again. This is normal.
A Traction Assist System, Anti-Lock Brake System
or engine-related problem has been detected and
the vehicle needs service.
4-8