2004 GMC YUKON brake light

Parking Brake
To set the parking brake, hold the regular brake pedal
down with your right foot. Push down the parking
brake pedal with your left foot.
A chime will activate and the warning light will ash
when the parking brake is applied and the vehicle
is moving at least 3 mph (5 km/h) for at least three
seconds.To release the parking brake, hold the regular brake
pedal down. Pull the bottom edge of the lever, located
above the parking brake pedal, with the parking
brake symbol, to release the parking brake.
If the ignition is on when the parking brake is released,
the brake system warning light will go off.
Notice:Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify that
the parking brake is fully released and the brake
warning light is off before driving.
If you are towing a trailer and are parking on any hill,
seeTowing a Trailer on page 4-63.
2-37

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-7
Horn.............................................................3-7
Tilt Wheel.....................................................3-7
Turn Signal/Multifunction Lever.........................3-8
Exterior Lamps.............................................3-15
Interior Lamps..............................................3-19
Accessory Power Outlets...............................3-21
Ashtrays and Cigarette Lighter........................3-21
Climate Controls............................................3-22
Climate Control System.................................3-22
Dual Climate Control System..........................3-23
Dual Automatic Climate Control System...........3-27
Rear Air Conditioning System.........................3-34
Rear Air Conditioning and Heating System.......3-35
Rear Air Conditioning and Heating System
and Electronic Climate Controls...................3-38
Warning Lights, Gages and Indicators.............3-40
Warning Lights, Gages, and Indicators.............3-40
Instrument Panel Cluster................................3-41
Speedometer and Odometer...........................3-42
Tachometer.................................................3-42
Safety Belt Reminder Light.............................3-42
Air Bag Readiness Light................................3-43
Passenger Air Bag Status Indicator.................3-43Battery Warning Light....................................3-45
Voltmeter Gage............................................3-45
Brake System Warning Light..........................3-46
Anti-Lock Brake System Warning Light.............3-47
Traction Off Light..........................................3-48
Engine Coolant Temperature Gage..................3-49
Transmission Temperature Gage.....................3-49
Tire Pressure Light.......................................3-51
Malfunction Indicator Lamp.............................3-51
Oil Pressure Gage........................................3-55
Cruise Control Light......................................3-56
Four-Wheel-Drive Light..................................3-56
Tow/Haul Mode Light....................................3-56
Fuel Gage...................................................3-57
Low Fuel Warning Light.................................3-57
Driver Information Center (DIC).......................3-58
DIC Operation and Displays...........................3-58
DIC Warnings and Messages.........................3-70
Audio System(s).............................................3-77
Setting the Time for Radios without Radio
Data Systems (RDS)..................................3-77
Setting the Time for Radios with Radio
Data Systems (RDS)..................................3-78
AM-FM Radio...............................................3-78
Radio with CD..............................................3-81
Radio with Cassette and CD..........................3-92
Section 3 Instrument Panel
3-1

A. Dome Lamp Override Button. See “Dome Lamps”
underInterior Lamps on page 3-19.
B. Exterior Lamp Controls. SeeExterior Lamps on
page 3-15.
C. Air Outlets. See “Climate Controls” in Section 3.
D. Automatic Transfer Case/Stabilitrak
®Mode Button
(AWD Vehicles)/Traction Assist System (TAS).
SeeFour-Wheel Drive on page 2-28.
E. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 3-8.
F. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-41.
G. Gearshift Lever. SeeAutomatic Transmission
Operation on page 2-24.
H. Tow/Haul Selector Button (If Equipped). See
Automatic Transmission Operation on page 2-24.
I. Audio System. SeeAudio System(s) on page 3-77.
J. Comfort Control System. SeeClimate Control
System on page 3-22.K. Instrument Panel Fuse Block. SeeFuses and Circuit
Breakers on page 5-113.
L. Hood Release. SeeHood Release on page 5-11.
M. Steering Wheel Control Buttons (If Equipped).
SeeDriver Information Center (DIC) on page 3-58.
N. Center Instrument Panel Utility Block. SeeFuses and
Circuit Breakers on page 5-113.
O. Tilt Wheel Lever. SeeTilt Wheel on page 3-7.
P. Parking Brake Release. SeeParking Brake on
page 2-37.
Q. Lighter and Accessory Power Outlets. See
Accessory Power Outlets on page 3-21.
R. Storage Area (If Equipped). See “Storage Areas” in
Section 2.
S. Ashtray. SeeAshtrays and Cigarette Lighter on
page 3-21.
T. Glovebox. SeeGlove Box on page 2-60.
3-5

Reducing Speed While Using Cruise
Control

Press in the button at the end of the lever until you
reach the lower speed you want, then release it.
To slow down in very small amounts, briey press
the set button. Each time you do this, you’ll go
about 1 mph (1.6 km/h) slower.
Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase your speed.
When you take your foot off the pedal, your vehicle will
slow down to the cruise control speed you set earlier.
Using Cruise Control on Hills
How well your cruise control will work on hills depends
upon your speed, load and the steepness of the
hills. When going up steep hills, you may want to step
on the accelerator pedal to maintain your speed.
When going downhill, you may have to brake or shift to
a lower gear to keep your speed down. Of course,
applying the brake takes you out of cruise control. Many
drivers nd this to be too much trouble and don’t use
cruise control on steep hills.
Ending Cruise Control
There are four ways to turn off the cruise control:
Step lightly on the brake pedal,
move the cruise control switch to off, or
shift the transmission to NEUTRAL (N).
If your vehicle has the Stabilitrak®feature, cruise
control will turn off if road conditions cause
Stabilitrak
®to activate.
If the accelerator pedal is held for 60 seconds or
longer, cruise control will turn off.
Erasing Speed Memory
When you turn off the cruise control or the ignition, your
cruise control set speed memory is erased.
3-14

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.
Brake System Warning Light
With the ignition on, the brake system warning light will
ash when you set the parking brake. The light will
ash if the parking brake doesn’t release fully. If you try
to drive with the parking brake engaged, a chime will
sound when the vehicle speed is greater than 3 mph
(5 km/h).
Your vehicle’s hydraulic brake system is divided into two
parts. If one part isn’t working, the other part can still
work and stop you. For good braking, though, you need
both parts working well.
If the warning light comes on and a chime sounds there
could be a brake problem. Have your brake system
inspected right away.This light should come on briey when you turn the
ignition key to RUN. If it doesn’t come on then, have it
xed so it will be ready to warn you if there’s a
problem.
If the light comes on while you are driving, pull off the
road and stop carefully. You may notice that the pedal is
harder to push. Or, the pedal may go closer to the
oor. It may take longer to stop. If the light is still on,
have the vehicle towed for service. SeeTowing
Your Vehicle on page 4-53. United States
Canada
3-46

{CAUTION:
Your brake system may not be working
properly if the brake system warning light is
on. Driving with the brake system warning light
on can lead to an accident. If the light is still
on after you have pulled off the road and
stopped carefully, have the vehicle towed for
service.
Anti-Lock Brake System Warning
Light
With the anti-lock brake
system, this light will come
on when you start your
engine and may stay on for
several seconds.
That’s normal. If the light doesn’t come on then, have it
xed so it will be ready to warn you if there is a problem.
If the light stays on, or comes on when you’re driving,
your vehicle needs service. You will also hear a chime
sound when the light is on steady. If the regular brake
system warning light isn’t on, you still have brakes, but
you don’t have anti-lock brakes. If the regular brake
system warning light is also on you don’t have anti-lock
brakes and there’s a problem with your regular brakes. In
addition to both lights, you will also hear a chime sound
on the rst occurrence of a problem and each time the
vehicle is shut off and then restarted. SeeBrake System
Warning Light on page 3-46.
3-47

Traction Off Light
If you have the Traction
Assist System, this light
should come on briey
when you turn the ignition
to RUN.
If the light doesn’t come on then, the system may
require service; have it xed so it will be there to warn
you if the system is turned off.
If the light stays on, or comes on when you’re driving,
there may be a problem with your Traction Assist
System and your vehicle may need service. When this
light is on, the system will not limit wheel spin. Adjust
your driving accordingly.
The traction off light may come on for the following
reasons:
If you turn the system off by pressing the TAS
on/off button located to the left of the steering wheel,
the light will come on and stay on. To turn the
system back on, press the button again; the light
should go off.
If you move the shift lever to FIRST (1), the light
will come on and stay on to indicate that the
traction system is off. This is normal operation. To
turn the system back on, move the shift lever
back to a position other than FIRST (1); the light
should go off. SeeTraction Assist System (TAS) on
page 4-9.
The light will come on and stay on if the TAS
automatic engagement feature has been turned off.
To turn the system on, press the TAS off/on
button; the light should go off. To turn the automatic
engagement feature back on, seeTraction Assist
System (TAS) on page 4-9.
If the Traction Assist System is affected by an
anti-lock brake system, TAS or engine-related
problem, the system will turn off and the light will
come on. Have your vehicle serviced.
If the vehicle is driven over an extremely rough
road, the system will turn off and the light will come
on. The light will go off a few seconds after the
rough road conditions go away or when the vehicle
comes to a complete stop. This is normal
operation.
3-48

SERVICE TIRE MONITOR
If your vehicle is equipped with the tire pressure monitor
system, this message will be displayed if one or more of
the tire monitor sensors have malfunctioned, or if all of
the tire monitor sensors have not been programmed
successfully. Press the select button or reset stem, to
clear it from the display. The message will reappear at
each ignition cycle until the system has been serviced.
STABILITY SYS ACTIVE
You may see the STABILITY SYS ACTIVE message on
the DIC. It means that an advanced computer-controlled
system has come on to help your vehicle continue to
go in the direction in which you’re steering.
Stabilitrak
®activates when the computer senses that
your vehicle is just starting to spin, as it might if you hit
a patch of ice or other slippery spot on the road.
When the system activates, you may hear a noise or
feel a vibration in the brake pedal. This is normal. When
the STABILITY SYS ACTIVE message is on, you
should continue to steer in the direction you want to go.
The system is designed to help you in bad weather
or other difficult driving situations by making the most of
whatever road conditions will permit.
STABILITY SYS DISABLED
The STABILITY SYS DISABLED message will turn on
when you press the Stabilitrak®button, or when the
stability control has been automatically disabled. To limit
wheel spin and realize the full benets of the stability
enhancement system, you should normally leave
Stabilitrak
®on. However, you should turn Stabilitrak®off
if your vehicle gets stuck in sand, mud, ice or snow and
you want to “rock” your vehicle to attempt to free it, or if
you are driving in extreme off-road conditions and require
more wheel spin. SeeIf You Are Stuck: In Sand, Mud, Ice
or Snow on page 4-50. To turn the Stabilitrak
®system
back on press the Stabilitrak®button again. There are
four conditions that can cause this message to appear.
One condition is overheating, which could occur if
Stabilitrak
®activates continuously for an extended period
of time. The message will also be displayed if the brake
system warning light is on. SeeBrake System Warning
Light on page 3-46. The message could be displayed if
the stability system takes longer than usual to complete
its diagnostic checks due to driving conditions. Also, if an
engine or vehicle related problem has been detected, and
the vehicle needs service, the message will appear.
The message will turn off as soon as the conditions that
caused the message to be displayed are no longer
present.
3-75