2004 GMC SIERRA DENALI stop start

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:Modi®cations 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.
Modi®cations 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.
This light should come on, as a check to show you it is
working, when the ignition is on and the engine is
not running. If the light does not come on, have it
repaired. This light will also come on during a
malfunction in one of two ways:
·Light FlashingÐ A mis®re condition has been
detected. A mis®re increases vehicle emissions
and may damage the emission control system on
your vehicle. Diagnosis and service may be
required.
·Light On SteadyÐ An emission control system
malfunction has been detected on your vehicle.
Diagnosis and service may be required.
If the Light is Flashing
The following may prevent more serious damage to
your vehicle:
·Reducing vehicle speed.
·Avoiding hard accelerations.
·Avoiding steep uphill grades.
·If you are towing a trailer, reduce the amount of
cargo being hauled as soon as it is possible.
If the light stops ¯ashing and remains on steady, see ªIf
the Light Is On Steadyº following.
If the light continues to ¯ash, when it is safe to do so,
stop the vehicle.Find a safe place to park your vehicle.
Turn the key off, wait at least 10 seconds and restart
the engine. If the light remains on steady, see ªIf
the Light Is On Steadyº following. If the light is still
¯ashing, follow the previous steps, and see your dealer
for service as soon as possible.
3-41

Timer
The DIC can be used as a stopwatch. 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
brie¯y while TIMER is displayed.
To reset the timer to zero, press and hold the select
button, or the trip odometer reset stem, while TIMER is
displayed.
Fuel Information Button
Use the fuel information button to scroll through the
range, average fuel economy, instant fuel economy and
the GM Oil Life System.
If your vehicle is not equipped with DIC steering wheel
control buttons you will not be able to display the
fuel information.
Fuel Range
Press the fuel information button until RANGE appears
to display the remaining distance you can drive
without refueling. It's 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.
Average Fuel Economy
Press the fuel information button until AVG ECON
appears in the display. Average fuel economy is how
many miles per gallon your vehicle is getting based on
current and past driving conditions.
Press and hold the select button for two seconds 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.
3-49

CHECK OIL LEVEL
If the oil level in the vehicle is low, this message will
appear on the DIC. Check and oil level and correct it as
necessary. You may need to let the vehicle cool or
warm up and cycle the ignition to be sure this message
will clear. The message will be displayed for 10 seconds
at the start of each ignition cycle when the oil needs
to checked. Once the problem is corrected, press
the select button to clear the message from the DIC
display.
CHECK WASHER FLUID
If the washer ¯uid level is low, this message will appear
on the DIC. Adding washer ¯uid will clear the message.
The message will be displayed for 10 seconds at
the start of each ignition cycle when the washer ¯uid is
low. Press the select button to acknowledge this
message and clear it from the DIC display.
DRIVER DOOR AJAR
If the driver'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. Pressing the select
button will acknowledge this message and clear it
from the DIC display.
ENGINE COOLANT HOT
If the cooling system temperature gets hot, this message
will appear in the DIC. Stop the vehicle and let the
engine idle in PARK (P) to allow the coolant to reach a
safe temperature. This message will clear when the
coolant temperature drops to safe operating
temperature, or by pressing the SELECT button.
ENGINE OVERHEATED
If the engine cooling system reaches unsafe
temperatures for operation, this message will appear in
the DIC and you will hear a chime. Stop and turn off
the vehicle as soon as it is safe to do so to avoid severe
damage. This message will clear when the engine
has cooled to a safe operating temperature.
FUEL LEVEL LOW
If the fuel level is low, this message will appear on the
DIC and you will hear a chime. Refuel as soon as
possible. Pressing the select button will acknowledge
this message and clear it from the DIC display. The
message will be displayed for 10 seconds at the start of
each ignition cycle when the fuel level is low.
3-59

SERVICE BRAKE SYSTEM
If there is a problem with the brake system, this
message will be displayed 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.
SERVICE BRAKE BOOSTER
If your vehicle has vacuum assist power brakes, this
message will be displayed on the DIC when there is a
problem with the Supplemental Brake Assist system.
If the message is displayed immediately after starting
the vehicle or the message appears while driving,
your Supplemental Brake Assist system needs service.
See
Brake System Warning Light on page 3-37.
{CAUTION:
Your brake system may not be working
properly if the SERVICE BRAKE BOOSTER
message is displayed.
If the brake system warning light is also on,
you should have the vehicle towed for service.
See ªBrake System Warning Lightº in the
Index.
If the brake system warning light isn't on, you
still have brakes, but the supplemental brake
assist system may not operate properly. In the
event of a vacuum loss, you may not have
vacuum power assist for braking. The brake
pedal will be harder to push and it will take
longer to stop. If you continue to drive with
this message displayed it can lead to a crash.
Have the brake system serviced as soon as
possible.
3-61

SERVICE 4WD
If a problem occurs with the four wheel drive 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 four wheel
drive system needs service. Press the SELECT button
to acknowledge the message.
SERVICE 4 WHEEL STEER
If a problem occurs with the 4 wheel steer 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 four wheel
steer system needs service. Press the SELECT button
to acknowledge the message and clear it from the
DIC display.
SERVICE AIR SUSPENSION
If a problem occurs with the suspension system, this
message will appear on the DIC. If this message
appears, stop as soon as possible and turn off thevehicle. 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 air
suspension system needs service. Press the SELECT
button to acknowledge the message.
SERVICE RIDE CONTROL
If a problem occurs with the suspension system, this
message will appear on the DIC. If this message
appears, stop 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 to drive, the air suspension system
needs service.
TIGHTEN FUEL CAP
If the vehicle's fuel cap is not tightened properly this
message may appear along with the check engine light
on the instrument panel. See
Malfunction Indicator
Lamp on page 3-40. Reinstall the fuel cap fully. SeeFilling Your Tank on page 5-6. 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. A few
driving tips with the cap properly installed should turn
the light and message off.
3-62

Playing a CD
Insert a CD partway into the slot, label side up. The
player will pull it in and the CD should begin playing. The
CD symbol will appear on the display. If you want to
insert a CD with the ignition off, ®rst press the eject
button or the DISPL knob.
If you turn off the ignition or radio with the CD in the
player, it will stay in the player. When you turn on
the ignition or the radio, the CD will start playing, where
it stopped, if it was the last selected audio source.
As each new track starts to play, the track number will
appear on the display.
The CD player can play the smaller 8 cm single CDs
with an adapter ring. Full-size CDs and the smaller CDs
are loaded in the same manner.
If playing a CD-R the sound quality may be reduced
due to CD-R quality, the method of recording, the quality
of the music that has been recorded, and the way the
CD-R has been handled. You may experience an
increase in skipping, difficulty in ®nding tracks, and/or
difficulty in loading and ejecting. If these problems occur
try a known good CD.
Do not add paper labels to CDs, they could get caught
in the CD player.Do not play 3 inch CDs without a standard adapter CD.
If an error appears on the display, see ªCD Messagesº
later in this section.
1 PREV (Previous):Press this pushbutton to go to the
current track if it has been playing for more than
eight seconds. TRACK and the track number will appear
on the display. If you hold this pushbutton or press it
more than once, the player will continue moving
backward through the CD.
2 NEXT:Press this pushbutton to go to the next track.
TRACK and the track number will appear on the
display. If you hold this pushbutton or press it more than
once, the player will continue moving forward through
the CD.
3 REV (Reverse):Press and hold this pushbutton to
reverse quickly within a track. Press and hold this
pushbutton for less than two seconds to reverse at
six times the normal playing speed. Press and hold it for
more than two seconds to reverse at 17 times the
normal playing speed. Release it to play the passage.
ET and the elapsed time of the track will appear on
the display.
3-77

4 FWD (Forward):Press and hold this pushbutton to
advance quickly within a track. Press and hold this
pushbutton for less than two seconds to advance
at six times the normal playing speed. Press and hold it
for more than two seconds to advance at 17 times
the normal playing speed. Release it to play the
passage. ET and the elapsed time of the track will
appear on the display.
6 RDM (Random):Press this pushbutton to hear the
tracks in random, rather than sequential, order. RDM ON
will appear on the display. RDM T and the track
number will appear on the display when each track
starts to play. Press this pushbutton again to turn
off random play. RDM OFF will appear on the display.
qSEEKr:Press the left arrow to go to the start
of the current or to the previous track. Press the
right arrow to go to the start of the next track. If you
hold either arrow or press it more than once, the player
will continue moving backward or forward through
the CD.
qSCANr:To scan the CD, press and hold either
SCAN arrow for more than two seconds until SCAN
appears on the display and you hear a beep. Use this
feature to listen to 10 seconds of each track of the
CD. Press either SCAN arrow again, to stop scanning.DISPL (Display):Press this knob to see how long the
current track has been playing. ET and the elapsed
time of the track will appear on the display. To change
the default on the display (track or elapsed time),
press this knob until you see the display you want, then
hold the knob for two seconds. The radio will produce
one beep and the selected display will now be the
default.
BAND:Press this button to listen to the radio when a
cassette tape or CD is playing. The inactive tape or CD
will remain safely inside the radio for future listening
TAPE DISC:Press this button to play a cassette tape
or CD when listening to the radio. The inactive tape
or CD will remain safely inside the radio for future
listening.
Z(Eject):Press this button to stop a CD when it is
playing or to eject a CD when it is not playing. Eject
may be activated with either the ignition or radio off.
CDs may be loaded with the radio and ignition off if this
button is pressed ®rst.
3-78

Anti-lock Brake System
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. See
Anti-Lock
Brake System Warning
Light on page 3-38
.
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's 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.
4-7