2004 GMC SONOMA lights

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
............................................... 1-7
Safety Belts
.............................................. 1-8
Child Restraints
.......................................1-27
Air Bag System
.......................................1-46
Restraint System Check
............................1-53
Features and Controls..................................... 2-1
Keys
........................................................ 2-2
Doors and Locks
....................................... 2-7
Windows
.................................................2-12
Theft-Deterrent Systems
............................2-14
Starting and Operating Your Vehicle
...........2-16
Mirrors
....................................................2-31
Storage Areas
.........................................2-33
Sunroof
..................................................2-42
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-2
Climate Controls
......................................3-18
Warning Lights, Gages and Indicators
.........3-21
Audio System(s)
.......................................3-35Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-45
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under the Hood
...............5-10
Rear Axle
...............................................5-46
Four-Wheel Drive
.....................................5-46
Front Axle
...............................................5-47
Bulb Replacement
....................................5-48
Windshield Wiper Blade Replacement
.........5-54
Tires
......................................................5-57
Appearance Care
.....................................5-86
Vehicle Identification
.................................5-94
Electrical System
......................................5-94
Capacities and Specifications
...................5-101
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 GMC Sonoma Owner ManualM

Vehicle Damage Warnings
Also, in this book you will find these notices:
Notice:These mean there is something that could
damage your vehicle.
A notice will tell you about something that can damage
your vehicle. Many times, this damage would not be
covered by your warranty, and it could be costly. But the
notice will tell you 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.
You’ll also see warning labels on your vehicle. They use
the same words, CAUTION or NOTICE.
Vehicle Symbols
Your vehicle has components and labels that use
symbols instead of text. Symbols, used on your vehicle,
are shown along with the text describing the operation
or information relating to a specific component, control,
message, gage or indicator.
If you need help figuring out a specific 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

Remote Keyless Entry System
Operation
If your vehicle has this feature, you can lock and
unlock your doors from about 3 feet (1 m) up to 30 feet
(9 m away using the remote keyless entry transmitter
supplied with your vehicle.
UNLOCK:Press UNLOCK
to unlock the driver’s door.
The parking lamps will
flash and the interior lights
will go on.
If you press UNLOCK again within three seconds, the
remaining doors will unlock.LOCK:Press LOCK to lock all the doors. Press LOCK
again within three seconds and the horn will chirp.L(Panic Alarm):Press this button to make the horn
sound and the headlamps and taillamps flash for up
to 30 seconds. This can be turned off by pressing
the panic button again, waiting for 30 seconds, or
starting the vehicle.
Matching Transmitter(s) to Your
Vehicle
Each remote keyless entry transmitter is coded to
prevent another transmitter from unlocking your vehicle.
If a transmitter is lost or stolen, a replacement can
be purchased through your dealer. Remember to bring
any remaining transmitters with you when you go to
your dealer. When the dealer matches the replacement
transmitter to your vehicle, any remaining transmitters
must also be matched. Once your dealer has coded the
new transmitter, the lost transmitter will not unlock
your vehicle. Each vehicle can have a maximum of four
transmitters matched to it.
2-5

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 Drive High):This setting is for driving
in most street and highway situations. Your front axle
is not engaged in two-wheel drive. When this light
is turned on, it is about one-half as bright as the others.4HI (Four-Wheel Drive 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 Drive Low):You may never need
4LO. This setting also engages your front axle to
give you extra traction. 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 briefly 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 flash 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.
2-23

Mirrors
Manual Rearview Mirror
Pull the tab under the mirror toward you to reduce the
glare from headlamps behind you after dark. Push
the tab away from you for normal daytime operation.
Automatic Dimming Rearview Mirror
If your vehicle has this feature, the mirror automatically
changes to reduce glare from headlamps behind
you. A photocell on the back of the mirror senses when
it is becoming dark outside. Another photocell built
into the mirror surface senses when headlamps
are behind you.
At night, when the glare is too high, the mirror will
gradually darken to reduce glare. This change may take
a few seconds. The mirror will return to its clear
daytime state when the vehicle is put into REVERSE (R)
or when the glare is reduced.
AUTO (Automatic Dimming):This button is located at
the base of the mirror. Use it to turn on the automatic
feature. The button has an indicator light to show it is on.
OFF:Press this button to turn the automatic
feature off.
Time Delay
The automatic mirror has a time delay feature which
prevents unnecessary switching from the night back to
the day position. This delay prevents rapid changing
of the mirror as you drive under lights and through traffic.
Cleaning the Photocells
Use a cotton swab and glass cleaner to clean the
photocells and mirror face when necessary.
Cleaning the Mirror
When cleaning the mirror, use a paper towel or similar
material dampened with glass cleaner. Do not spray
glass cleaner directly on the mirror as that may cause
the liquid cleaner to enter the mirror housing.
Outside Manual Mirror
Adjust your outside mirrors so you can see a little of the
side of your vehicle and the area beside and behind
your vehicle from a comfortable driving position.
You can also fold the mirrors in before entering a car
wash. Pull the mirrors in toward the vehicle. Push
the mirrors back out when finished.
2-31

Instrument Panel Overview...............................3-2
Hazard Warning Flashers................................3-4
Other Warning Devices...................................3-5
Horn.............................................................3-5
Tilt Wheel.....................................................3-5
Turn Signal/Multifunction Lever.........................3-6
Exterior Lamps.............................................3-11
Interior Lamps..............................................3-15
Accessory Power Outlets...............................3-16
Ashtrays and Cigarette Lighter........................3-17
Climate Controls............................................3-18
Climate Control System.................................3-18
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
Brake System Warning Light..........................3-27
Anti-Lock Brake System Warning Light.............3-28
Engine Coolant Temperature Gage..................3-28Malfunction Indicator Lamp.............................3-29
Oil Pressure Gage........................................3-32
Security Light...............................................3-33
Service Four-Wheel Drive Warning Light..........3-33
Check Gages Warning Light...........................3-34
Fuel Gage...................................................3-34
Low Fuel Warning Light.................................3-35
Audio System(s).............................................3-35
Setting the Time for Radios without Radio
Data Systems (RDS)..................................3-35
Setting the Time for Radios with Radio
Data Systems (RDS)..................................3-36
AM-FM Radio...............................................3-36
Radio with CD..............................................3-39
Radio with Cassette and CD..........................3-49
Radio with Six-Disc CD.................................3-59
Theft-Deterrent Feature (Non-RDS Radios).......3-73
Theft-Deterrent Feature (RDS Radios).............3-73
Understanding Radio Reception......................3-74
Care of Your Cassette Tape Player.................3-74
Care of Your CDs.........................................3-75
Care of Your CD Player................................3-76
Fixed Mast Antenna......................................3-76
XM™ Satellite Radio Antenna System
(48 Contiguous US States).........................3-76
Section 3 Instrument Panel
3-1

;(Parking Lamps):Turning the exterior lamps
control to this position turns on the parking lamps
together with the following:
•Sidemarker Lamps
•Taillamps
•License Plate Lamps
•Instrument Panel Lights
O(Headlamps):Turning the exterior lamps control to
this position turns on the headlamps, together with
the previously listed lamps and lights.
Automatic Headlamp System
When it is dark enough outside, your automatic
headlamp system will turn on your headlamps at the
normal brightness along with other lamps such as
the taillamps, sidemarker, parking lamps and the
instrument panel lights. The radio lights will also be dim.
Your vehicle is equipped with a light sensor on the
top of the instrument panel under the radio speaker grill.
Be sure it is not covered or the system will be on
whenever the ignition is on.
The system may also turn on your headlamps when
driving through a parking garage, heavy overcast
weather or a tunnel. This is normal.There is a delay in the transition between the daytime
and nighttime operation of the Daytime Running
Lamps (DRL) and the automatic headlamp systems so
that driving under bridges or bright overhead street
lights does not affect the system. The DRL and
automatic headlamp system will only be affected when
the light sensor sees a change in lighting lasting
longer than the delay.
To idle your vehicle with the automatic headlamp
system off, set the parking brake while the ignition is off.
Then start your vehicle. The automatic headlamp
system will stay off until you release the parking brake.
As with any vehicle, you should turn on the regular
headlamps when you need them.
You may be able to turn off your automatic headlamp
system. See “Daytime Running Lamps (DRL)” later
in this section for more information.
If you start your vehicle in a dark garage, the automatic
headlamp system will come on immediately. Once
you leave the garage, it will take approximately
one minute for the automatic headlamp system to
change to DRL if it is light outside. During that delay,
your instrument panel cluster may not be as bright
as usual. Make sure your instrument panel brightness
control is in the full bright position. See “Instrument
Panel Brightness Control” underInterior Lamps
on page 3-15.
3-12

Interior Lamps
Instrument Panel Brightness
This feature controls the brightness of the instrument
panel lights.
It is located on the driver’s side of your instrument panel
next to the exterior lamps control.
Turn the thumbwheel up to make your instrument panel
lights brighter or down to dim them. Turn the thumbwheel
all the way up to turn on the interior lamps.
Entry Lighting
Your vehicle is equipped with an entry lighting feature.
When any door is opened, the dome lamps will
come on if the DOME OVERRIDE button is in the out
position. If your vehicle is equipped with remote keyless
entry and all the doors are closed, or the front door
handles are lifted and released, the lamps will stay on
for a short period of time and will turn off automatically.
If you use your remote keyless entry transmitter to
unlock the vehicle, the interior lights will come on for a
short time whether or not the DOME OVERRIDE
button is in the out position.
Exit Lighting
With exit lighting, the interior lamps will come on when
you remove the key from the ignition to help you
see while exiting the vehicle. These lights will stay on
for a short period of time and then will go out, if the
DOME OVERRIDE button is in the out position.
Front Map Lamps
If your vehicle has front map lamps, they are located in
the overhead console. The front map lights that are
located on the inside rearview mirror will automatically
come on for approximately 40 seconds when the
doors are unlocked with the remote keyless entry
transmitter (if equipped) or until the ignition key is turned
to RUN or ACCESSORY. The lamps will also stay on
for approximately 40 seconds after you exit the vehicle,
unless you lock the doors with the remote keyless
entry transmitter.
You can also turn the lamps on and off by pressing the
switch near each lamp.
3-15