2004 GMC SONOMA tires

97,500 Miles (162 500 km)
❑Change engine oil and filter (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs first).(See footnote #.)
❑Check rear/front axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-68for proper rotation pattern and additional
information.(See footnote +.)
100,000 Miles (166 000 km)
❑Inspect spark plug wires.An Emission Control
Service.
❑Replace spark plugs.An Emission Control Service.
❑If you have not used your vehicle under severe
service conditions listed previously and, therefore,
have not changed your automatic transmission fluid,
change both the fluid and filter.
❑Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
150,000 Miles (240 000 km)
❑Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
SeeEngine Coolant on page 5-23for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
❑Inspect engine accessory drive belt.An Emission
Control Service.
6-24

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specified to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-13for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-23for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer tank and add the proper fluid if necessary.
SeeWindshield Washer Fluid on page 5-36for further
details.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are
inflated to the correct pressures. Do not forget to check
your spare tire. SeeTires on page 5-57for further
details.
Cassette Tape Player Service
Clean cassette tape player. Cleaning should be done
every 50 hours of tape play. SeeAudio System(s)
on page 3-35for further details.
6-25

Audio System(s) (cont.)
Fixed Mast Antenna.....................................3-76
Radio with Cassette and CD.........................3-49
Radio with CD............................................3-39
Radio with Six-Disc CD................................3-59
Setting the Time for Radios with Radio
Data Systems (RDS)................................3-36
Setting the Time for Radios without Radio
Data Systems (RDS)................................3-35
Theft-Deterrent Feature................................3-73
Understanding Radio Reception.....................3-74
XM™ Satellite Radio Antenna System............3-76
Automatic Headlamp System............................3-12
Automatic Transmission
Fluid..........................................................5-19
Operation...................................................2-20
Automatic Transmission Check..........................6-26
Automatic Transmission Shift Lock Control
System Check.............................................6-28
B
Backing Up....................................................4-61
Battery..........................................................5-40
Battery Replacement......................................... 2-6Battery Rundown Protection.............................3-16
Bed Rails......................................................2-41
Before Leaving on a Long Trip.........................4-34
Before You Go Off-Roading..............................4-14
Body Lubrication Service..................................6-27
Brake
Parking......................................................2-25
System Inspection.......................................6-31
System Warning Light..................................3-27
Brake Adjustment............................................5-40
Brake Fluid....................................................5-37
Brake Pedal Travel.........................................5-39
Brake Wear...................................................5-39
Brakes..........................................................5-37
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-16
Bulb Replacement...........................................5-48
Center High-Mounted Stoplamp (CHMSL)........5-52
Halogen Bulbs............................................5-48
Headlamps.................................................5-49
One-Piece Front Turn Signal Lamps...............5-51
Replacement Bulbs......................................5-54
Taillamps....................................................5-53
Two-Piece Front Turn Signal Lamps...............5-51
Buying New Tires...........................................5-70
2

C
California Fuel.................................................. 5-5
Canada........................................................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Specifications..........................5-101
Carbon Monoxide...................4-38, 4-55, 2-11, 2-29
Care of
Safety Belts................................................5-89
Your Cassette Tape Player............................3-74
Your CD Player...........................................3-76
Your CDs ...................................................3-75
Cassette Tape Messages.................................3-56
Cassette Tape Player Service...........................6-25
CD Adapter Kits.............................................3-56
CD Messages................................3-48, 3-58, 3-73
Center High-Mounted Stoplamp (CHMSL)...........5-52
Center Passenger Position, Safety Belts.............1-21
Certification/Tire Label.....................................4-49
Chains, Tires..................................................5-74
Charging System Light....................................3-26
Check
Engine Light...............................................3-29
Gages Warning Light...................................3-34
Checking Brake Fluid......................................5-38
Checking Coolant............................................5-25
Checking Engine Oil........................................5-13
Checking the Automatic Transmission
Fluid Level.................................................5-21Checking Things Under the Hood......................5-10
Checking Your Restraint Systems......................1-53
Chemical Paint Spotting...................................5-92
Child Restraints
Child Restraint Systems...............................1-33
Infants and Young Children...........................1-29
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-39
Older Children.............................................1-27
Securing a Child Restraint Designed for
the LATCH System...................................1-41
Securing a Child Restraint in a Center
Seat Position...........................................1-43
Securing a Child Restraint in a Rear
Outside Seat Position...............................1-41
Securing a Child Restraint in the Right
Front Seat Position...................................1-44
Top Strap...................................................1-37
Top Strap Anchor Location............................1-38
Where to Put the Restraint...........................1-36
Cigarette Lighter.............................................3-17
Cleaning
Inside of Your Vehicle..................................5-86
Outside of Your Vehicle................................5-89
Underbody Maintenance...............................5-92
Weatherstrips..............................................5-89
Cleaning Aluminum Wheels..............................5-91
Cleaning Exterior Lamps/Lenses.......................5-90
Cleaning Fabric/Carpet....................................5-86
Cleaning Glass Surfaces..................................5-88
3

Cleaning Interior Plastic Components.................5-88
Cleaning Leather............................................5-88
Cleaning the Mirror.........................................2-31
Cleaning the Photocells...................................2-31
Cleaning the Top of the Instrument Panel...........5-88
Cleaning the Windshield and Wiper Blades.........5-91
Cleaning Tires................................................5-91
Cleaning Vinyl................................................5-88
Cleaning Wood Panels....................................5-88
Climate Control System...................................3-18
Outlet Adjustment........................................3-20
Compact Spare Tire........................................5-85
Content Theft-Deferrent....................................2-14
Control of a Vehicle.......................................... 4-5
Coolant
Engine Temperature Gage............................3-28
Heater, Engine............................................2-19
Cooling System..............................................5-28
Cruise Control.................................................. 3-9
Current and Past Model Order Forms................7-12
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Program for Persons with
Disabilities................................................ 7-5
Reporting Safety Defects to General Motors....7-11Customer Assistance Information (cont.)
Reporting Safety Defects to the Canadian
Government............................................7-11
Reporting Safety Defects to the United States
Government............................................7-10
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-11
D
Daytime Running Lamps..................................3-13
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-19
Doing Your Own Service Work........................... 5-3
Dome Lamp...................................................3-16
Door
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks............... 2-8
Rear Door Security Locks.............................2-10
Driver
Position, Safety Belt.....................................1-14
Driver Information Center (DIC).........................2-38
Driving
At Night.....................................................4-27
City...........................................................4-32
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-33
4

Steering in Emergencies..................................4-10
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection..............................6-30
Steering Tips................................................... 4-9
Storage
Garment Hooks...........................................2-40
Storage Areas
Front Storage Area......................................2-40
Glove Box..................................................2-33
Luggage Carrier..........................................2-40
Overhead Console.......................................2-33
Storing a Flat or Spare Tire and Tools...............5-83
Stuck in Sand, Mud, Ice or Snow......................4-42
Sun Visors.....................................................2-14
Sunglasses Storage Compartment.....................2-37
Sunroof.........................................................2-42
T
Tachometer....................................................3-24
Tailgate.........................................................2-11
Tailgate Lubrication Service..............................6-27
Taillamps.......................................................5-53
Temperature and Compass Display....................2-36
Testing the Alarm............................................2-15
Theft-Deterrent, Radio.....................................3-73Theft-Deterrent Systems...................................2-14
Content Theft-Deterrent................................2-14
Passlock
®...................................................2-16
Throttle System Inspection...............................6-31
Tilt Wheel........................................................ 3-5
Time Delay....................................................2-31
Tire Inflation Check.........................................6-25
Tire Sidewall Labeling......................................5-58
Tire Size.......................................................5-63
Tire Terminology and Definitions........................5-64
Tires.............................................................5-57
Buying New Tires........................................5-70
Chains.......................................................5-74
Changing a Flat Tire....................................5-75
Compact Spare Tire.....................................5-85
If a Tire Goes Flat.......................................5-74
Inflation - Tire Pressure................................5-67
Inspection and Rotation................................5-68
Uniform Tire Quality Grading.........................5-71
Wheel Alignment and Tire Balance.................5-72
Wheel Replacement.....................................5-72
When It Is Time for New Tires......................5-69
To Use the Engine Coolant Heater....................2-19
Top Strap......................................................1-37
Top Strap Anchor Location...............................1-38
Torque Lock...................................................2-28
14

Total Weight on Your Vehicle’s Tires..................4-58
Towing
Recreational Vehicle.....................................4-45
Towing a Trailer..........................................4-55
Your Vehicle...............................................4-45
Trailer
Recommendations.......................................4-54
Trailer Brakes.................................................4-60
Transfer Case........................................2-23, 5-46
Transfer Case and Front Axle
(Four-Wheel Drive) Inspection.......................6-31
Transmission
Fluid, Automatic...........................................5-19
Transmission Operation, Automatic....................2-20
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-12
Transportation Options...................................... 7-8
Traveling to Remote Areas...............................4-16
Trip Odometer................................................3-24
Truck-Camper Loading Information....................4-52
Turn and Lane-Change Signals.......................... 3-6
Turn Signal/Multifunction Lever........................... 3-6
Turn Signals When Towing a Trailer..................4-61
Two-Piece Composite Headlamp System............5-50
Two-Tiered Loading.........................................4-51U
Underbody Flushing Service.............................6-29
Understanding Radio Reception........................3-74
Uniform Tire Quality Grading............................5-71
United States................................................... 7-4
Used Replacement Wheels..............................5-73
Using Cleaner on Fabric..................................5-87
Using Song List Mode.....................................3-71
Using the Recovery Hooks...............................4-43
V
Vehicle
Control........................................................ 4-5
Damage Warnings........................................... iv
Loading......................................................4-45
Symbols......................................................... iv
Vehicle Data Collection and Event
Data Records............................................... 7-9
Vehicle Identification
Number (VIN).............................................5-94
Service Parts Identification Label...................5-94
Vehicle Storage..............................................5-41
Ventilation Adjustment......................................3-20
Visors...........................................................2-14
Voltmeter Gage..............................................3-26
15