2004 CHEVROLET SILVERADO climate control

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-3
Rear Seats
............................................... 1-9
Safety Belts
.............................................1-10
Child Restraints
.......................................1-32
Air Bag Systems
......................................1-67
Restraint System Check
............................1-84
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
....................................... 2-8
Windows
.................................................2-17
Theft-Deterrent Systems
............................2-20
Starting and Operating Your Vehicle
...........2-22
Mirrors
....................................................2-55
OnStar
®System
......................................2-65
Storage Areas
.........................................2-67
Vehicle Personalization
.............................2-70
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-20
Warning Lights, Gages, and Indicators
........3-33
Driver Information Center (DIC)
..................3-53
Audio System(s)
.......................................3-72Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-52
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-5
Checking Things Under the Hood
...............5-12
All-Wheel Drive
........................................5-58
Rear Axle
...............................................5-59
Four-Wheel Drive
.....................................5-60
Noise Control System
...............................5-61
Bulb Replacement
....................................5-63
Windshield Wiper Blade Replacement
.........5-73
Tires
......................................................5-74
Appearance Care
...................................5-114
Vehicle Identication
...............................5-122
Electrical System
....................................5-123
Capacities and Specications
...................5-132
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 Silverado Owner ManualM

Vehicle Damage Warnings
Also, in this manual you will nd these notices:
Notice:These mean there is something that could
damage your vehicle.
A notice tells about something that can damage the
vehicle. Many times, this damage would not be covered
by your vehicle’s warranty, and it could be costly. But
the notice will tell what to do to help avoid the damage.
When you read other manuals, you might see
CAUTION and NOTICE warnings in different colors
or in different words.
There are also warning labels on the vehicle. They use
the same words, CAUTION or NOTICE.
Vehicle Symbols
The vehicle has components and labels that use
symbols instead of text. Symbols are shown along with
the text describing the operation or information
relating to a specic component, control, message,
gage, or indicator.
If you need help guring out a specic name of
a component, gage, or indicator, reference the
following topics:
Seats and Restraint Systems in Section 1
Features and Controls in Section 2
Instrument Panel Overview in Section 3
Climate Controls in Section 3
Warning Lights, Gages, and Indicators in Section 3
Audio System(s) in Section 3
Engine Compartment Overview in Section 5
iv

Engine Exhaust
{CAUTION:
Engine exhaust can kill. It contains the gas
carbon monoxide (CO), which you can not see
or smell. It can cause unconsciousness
and death.
You might have exhaust coming in if:
Your exhaust system sounds strange
or different.
Your vehicle gets rusty underneath.
Your vehicle was damaged in a collision.
Your vehicle was damaged when driving
over high points on the road or over
road debris.
Repairs were not done correctly.
Your vehicle or exhaust system had been
modied improperly.
If you ever suspect exhaust is coming into
your vehicle:
Drive it only with all the windows down to
blow out any CO; and
Have your vehicle xed immediately.
Running Your Engine While You
Are Parked
It is better not to park with the engine running. But if
you ever have to, here are some things to know.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust into
your vehicle. See the earlier Caution under
Engine Exhaust on page 2-53.
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle even if
the climate control fan is at the highest setting.
One place this can happen is a garage.
Exhaust — with CO — can come in easily.
NEVER park in a garage with the
engine running.
Another closed-in place can be a blizzard. See
Winter Driving on page 4-46.
2-53

Outside Convex Mirror
Your passenger’s side mirror is convex. A convex
mirror’s surface is curved so you can see more from the
driver’s seat.
{CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder
before changing lanes.
Outside Heated Mirrors
The outside rearview mirrors with this option have a
defrost mode.
To turn on the defrost feature, press the rear window
defogger button. See “Rear Window Defogger”
underDual Automatic Climate Control System on
page 3-25for further information.
OnStar®System
OnStar®uses global positioning system (GPS) satellite
technology, wireless communications, and state of
the art call centers to provide you with a wide range of
safety, security, information and convenience services.
A complete OnStar
®user’s guide and the terms
and conditions of the OnStar®Subscription Service
Agreement are included in your OnStar®-equipped
vehicle’s glove box literature. For more information, visit
www.onstar.com, contact OnStar
®at 1-888-4-ONSTAR
(1-888-466-7827), or press the blue OnStar®button
to speak to an OnStar®advisor 24 hours a day,
7 days a week.
A completed Subscription Service Agreement is required
prior to delivery of OnStar
®services and prepaid
calling minutes are also required for OnStar®Personal
Calling and OnStar®Virtual Advisor use. Terms and
conditions of the Subscription Service Agreement can be
found at www.onstar.com.
2-65

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-6
Horn.............................................................3-6
Tilt Wheel.....................................................3-7
Turn Signal/Multifunction Lever.........................3-7
Exterior Lamps.............................................3-13
Interior Lamps..............................................3-18
Accessory Power Outlets...............................3-19
Ashtrays and Cigarette Lighter........................3-20
Climate Controls............................................3-20
Climate Control System.................................3-20
Dual Climate Control System..........................3-22
Dual Automatic Climate Control System...........3-25
Warning Lights, Gages, and Indicators............3-33
Instrument Panel Cluster................................3-34
Speedometer and Odometer...........................3-35
Tachometer.................................................3-35
Safety Belt Reminder Light.............................3-36
Air Bag Readiness Light................................3-36
Air Bag Off Light..........................................3-37
Passenger Air Bag Status Indicator.................3-40
Battery Warning Light....................................3-42
Voltmeter Gage............................................3-42
Up-Shift Light...............................................3-43
Brake System Warning Light..........................3-43Anti-Lock Brake System Warning Light.............3-44
Traction Off Light..........................................3-45
Engine Coolant Temperature Gage..................3-46
Transmission Temperature Gage.....................3-46
Malfunction Indicator Lamp.............................3-48
Oil Pressure Gage........................................3-50
Cruise Control Light......................................3-51
Four-Wheel-Drive Light..................................3-51
Tow/Haul Mode Light....................................3-52
Overdrive Disable.........................................3-52
Fuel Gage...................................................3-52
Low Fuel Warning Light.................................3-53
Driver Information Center (DIC).......................3-53
DIC Operation and Displays...........................3-54
DIC Warnings and Messages.........................3-64
Audio System(s).............................................3-72
Setting the Time for Radios without
Radio Data Systems (RDS)........................3-72
Setting the Time for Radios with Radio
Data Systems (RDS)..................................3-73
AM-FM Radio...............................................3-73
Radio with CD..............................................3-76
Radio with Cassette and CD..........................3-86
Radio with Six-Disc CD................................3-100
Rear Seat Entertainment System...................3-114
Rear Seat Audio (RSA)................................3-125
Section 3 Instrument Panel
3-1

The main components of your instrument panel are the following:
A. Dome Lamp Button. See “Dome Lamps” under
Interior Lamps on page 3-18.
B. Exterior Lamp Controls. SeeExterior Lamps on
page 3-13.
C. Air Outlets. See “Climate Controls” in Section 3.
D. Automatic Transfer Case/Electronic Transfer
Case/Traction Assist System (TAS). SeeFour-Wheel
Drive on page 2-36.
E. Multifunction Lever. SeeTurn Signal/Multifunction
Lever on page 3-7.
F. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-34.
G. Gearshift Lever (Automatic Transmission). See
Automatic Transmission Operation on page 2-27.
H. Tow/Haul Selector and Overdrive Disable (Allison
Transmission
®Only) Button (If Equipped). See
Automatic Transmission Operation on page 2-27.
I. Audio System. SeeAudio System(s) on page 3-72.
J. Comfort Control System. SeeClimate Control
System on page 3-20.
K. Instrument Panel Fuse Block.Fuses and Circuit
Breakers on page 5-123.L. Hood Release. SeeHood Release on page 5-12.
M. Steering Wheel Control Buttons (If Equipped).
SeeDriver Information Center (DIC) on page 3-53.
N. Center Instrument Panel Utility Block. SeeFuses and
Circuit Breakers on page 5-123.
O. Parking Brake Release. SeeParking Brake on
page 2-48.
P. Tilt Wheel Lever. SeeTilt Wheel on page 3-7.
Q. Lighter and Accessory Power Outlet. SeeAccessory
Power Outlets on page 3-19, andAshtrays and
Cigarette Lighter on page 3-20.
R. Storage Area. See “Storage Areas” in Section 2.
S. Ashtray. SeeAshtrays and Cigarette Lighter
on page 3-20.
T. Manual Selectable Ride Control (If Equipped). See
Manual Selectable Ride on page 4-11.
U. 4WS Switch (If Equipped). SeeQUADRASTEER™
on page 4-15.
V. Passenger Air Bag Off Switch. SeeAir Bag Off
Switch on page 1-73.
W. Glove Box. SeeGlove Box on page 2-67.
3-5

Ashtrays and Cigarette Lighter
Your vehicle may be equipped with a front ashtray
located near the center of the instrument panel. Pull on
the door to open it.
Notice:If you put papers or other ammable
items in the ashtray, hot cigarettes or other
smoking materials could ignite them and possibly
damage your vehicle. Never put ammable items in
the ashtray.
To remove the front ashtray, pull the ashtray toward
you. To replace the ashtray, place the ashtray on
the slides at the side of its location in the instrument
panel. To use the cigarette lighter, push it in all the
way, and let go. When it’s ready, it will pop back out
by itself.
Notice:Holding a cigarette lighter in while it is
heating will not allow the lighter to back away from
the heating element when it is hot. Damage from
overheating may occur to the lighter or heating
element, or a fuse could be blown. Do not hold a
cigarette lighter in while it is heating.
Climate Controls
Climate Control System
Fan Knob
The fan knob on the left side of the control panel
adjusts the fan speed. To increase airow, turn the knob
clockwise. To decrease airow, turn it counterclockwise.
To turn the fan off, turn the knob to the off position.
9(Off):If the fan is off, outside air will still enter the
vehicle, and will be directed based on the position of
the mode knob. The temperature can also be adjusted
using the temperature knob.
3-20

Dual Climate Control System
With this system you can control the heating, cooling
and ventilation for your vehicle.
9(Fan):Turn the left knob clockwise or
counterclockwise to increase or decrease the fan speed.
Turn the knob to the off position to turn off the fan. If
the knob is in off outside air will still enter the vehicle,
and will be directed based on the position of the
mode knob. The temperature can also be adjusted
using the temperature levers.
Turn the right knob clockwise or counterclockwise to
direct the airow inside of your vehicle.To change the current mode, select one of the following:
H(Vent):This mode directs air to the instrument
panel vents.
)(Bi-Level):This mode directs half of the air to the
instrument panel vents; then directs most of the
remaining air to the oor vents. A little air is directed
toward the windshield and the side window vents. Cooler
air is directed to the upper vents and warmer air to
the oor vents.
6(Floor):This mode directs most of the air to the
oor vents with a little air directed to the windshield and
the side window vents.
h(Recirculation):The recirculation mode is used
to recirculate the air inside of your vehicle. Use this
mode to help prevent outside odors and/or dust
from entering your vehicle or to help cool the air inside
of your vehicle more quickly. Press this button to
turn the recirculation mode on or off. The light on the
recirculation button will illuminate. Recirculation cannot
be used in oor, blend or defrost modes. An indicator
on the button will light up, ash three times and turn off
when recirculation is selected in these modes.The
air-conditioning compressor will also come on when this
mode is activated. While in recirculation mode the
windows may fog when the weather is cold and damp.
To clear the fog, select either the blend or defrost
mode and increase fan speed.
3-22