2004 CHEVROLET TRAIL BLAZER towing

Automatic Transmission Fluid
When to Check and Change
A good time to check your automatic transmission uid
level is when the engine oil is changed.
Change both the uid and lter every 50,000 miles
(83 000 km) if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every
100,000 miles (166 000 km).
How to Check
Because this operation can be a little difficult, you may
choose to have this done at the dealership service
department.
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading on the dipstick.
Notice:Too much or too little uid can damage
your transmission. Too much can mean that some
of the uid could come out and fall on hot engine
part or exhaust system parts, starting a re.
Too little uid could cause the transmission to
overheat. Be sure to get an accurate reading if you
check your transmission uid.
Wait at least 30 minutes before checking the
transmission uid level if you have been driving:
When outside temperatures are above 90°F (32°C).
At high speed for quite a while.
In heavy traffic-especially in hot weather.
While pulling a trailer.
To get the right reading, the uid should be at
normal operating temperature, which is 180°F to 200°F
(82°C to 93°C).
5-21

6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fan.
7. By this time, the coolant level inside the radiator
ller neck may be lower. If the level is lower, add
more of the proper DEX-COOL
®coolant mixture
through the ller neck until the level reaches
the base of the ller neck.
8. Then replace the pressure cap. At any time during
this procedure if coolant begins to ow out of the
ller neck, reinstall the pressure cap. Be sure
the pressure cap is hand-tight.
Engine Fan Noise
This vehicle has a clutched engine cooling fan. When
the clutch is engaged, the fan spins faster to provide
more air to cool the engine. In most everyday driving
conditions the clutch is not engaged. This improves fuel
economy and reduces fan noise. Under heavy vehicle
loading, trailer towing, and/or high outside temperatures,
the fan speed increases when the clutch engages. So
you may hear an increase in fan noise. This is
normal and should not be mistaken as the transmission
slipping or making extra shifts. It is merely the cooling
system functioning properly. The fan will slow down
when additional cooling is not required and the clutch
disengages.
You may also hear this fan noise when you start the
engine. It will go away as the fan clutch disengages.
5-34

(c)Visually inspect hoses and have them replaced if
they are cracked, swollen or deteriorated. Inspect
all pipes, ttings and clamps; replace with genuine GM
parts as needed. To help ensure proper operation, a
pressure test of the cooling system and pressure
cap and cleaning the outside of the radiator and air
conditioning condenser is recommended at least once
a year.
(d)Visually inspect wiper blades for wear or cracking.
Replace blade inserts that appear worn or damaged
or that streak or miss areas of the windshield.
(e)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced. Also look for any opened or broken air bag
coverings, and have them repaired or replaced. (The air
bag system does not need regular maintenance.)
(f)Lubricate all key lock cylinders, hood latch assembly,
secondary latch, pivots, spring anchor, release pawl,
rear compartment hinges, outer liftgate handle pivot
points, rear door detent link, roller mechanism, liftgate
handle pivot points, latch bolt, fuel door hinge, cargo
door hinge, locks and folding seat hardware.More frequent lubrication may be required when
exposed to a corrosive environment. Applying silicone
grease on weatherstrips with a clean cloth will make
them last longer, seal better and not stick or squeak.
(g)Add uid as needed. A uid loss could indicate
a problem; repair as needed. Check vent hose at
transfer case for kinks and proper installation.
(h)Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
(i)Drain, ush and rell cooling system. See Engine
Coolant on page 5-23for what to use. Inspect hoses.
Clean radiator, condenser, pressure cap and ller neck.
Pressure test the cooling system and pressure cap.
(j)A uid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the uid level checked. Add uid if needed.
6-8

Coolant
Engine Temperature Gage............................3-39
Heater, Engine............................................2-21
Cooling System..............................................5-28
Cruise Control................................................3-12
Cruise Control Light........................................3-45
CURB VIEW ACTIVATED.................................3-60
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....7-11
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 (DRL).........................3-16
Defensive Driving............................................. 4-2
Defogging and Defrosting.........................3-22, 3-27Delayed Locking............................................... 2-9
Dinghy Towing................................................4-45
Doing Your Own Service Work........................... 5-4
Dolly Towing..................................................4-46
Dome Lamp Override......................................3-18
Dome Lamps.................................................3-19
Door
Delayed Locking........................................... 2-9
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Driver
Position, Safety Belt.....................................1-14
DRIVER DOOR AJAR.....................................3-59
Driver Information Center (DIC).........................3-48
DIC Operation and Displays..........................3-49
DIC Warnings and Messages........................3-57
Driving
At Night.....................................................4-28
City...........................................................4-32
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-33
Hill and Mountain Roads..............................4-36
In Rain and on Wet Roads...........................4-29
Winter........................................................4-37
Driving Across an Incline..................................4-24
Driving Downhill..............................................4-23
Driving in Mud, Sand, Snow or Ice....................4-26
4

Low Fuel Warning Light...................................3-48
Luggage Carrier..............................................2-44
Lumbar
Manual Controls............................................ 1-3
Power Controls............................................. 1-3
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month.................................. 6-9
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7
Maintenance Record....................................6-16
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-14
Owner Checks and Services........................... 6-9
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using Your................................................... 6-3
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-62
Making Turns.................................................4-60
Malfunction Indicator Light................................3-40
Manual Lumbar Controls.................................... 1-3
Manual Seats................................................... 1-2
Matching Transmitter(s) to Your Vehicle............... 2-6Memory Seat.................................................2-50
Message
DIC Warnings and Messages........................3-57
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands) – Customer Assistance....................... 7-5
Mirror Operation.............................................2-34
Mirrors
Automatic Dimming Rearview with OnStar®
and Compass..........................................2-34
Outside Convex Mirror.................................2-37
Outside Curb View Assist Mirrors...................2-36
Outside Heated Mirrors................................2-37
Outside Manual Mirrors................................2-35
Outside Power Mirrors..................................2-36
MyGMLink.com................................................ 7-3
N
Navigation/Radio System..................................3-99
New Vehicle Break-In......................................2-18
Normal Maintenance Replacement Parts............6-14
O
Odometer......................................................3-34
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-44
9

Power Steering...............................................4-10
Programmable Automatic Door Locks.................2-10
Programmable Locking Feature.........................2-10
Programmable Unlocking Feature......................2-11
Programming the HomeLink
®Transmitter...........2-39
Q
Questions and Answers About Safety Belts.........1-13
R
Radiator Pressure Cap....................................5-25
Radio Data System (RDS)...............3-62, 3-72, 3-86
Radio Messages.....................................3-67, 3-78
Radios..........................................................3-61
Care of Your Cassette Tape Player...............3-114
Care of Your CD and DVD Player................3-115
Care of Your CDs and DVDs.......................3-115
Navigation/Radio System..............................3-99
Radio Personalization.................................3-112
Radio with Cassette and CD.........................3-72
Radio with CD............................................3-62
Radio with Six-Disc CD................................3-86
Rear Seat Audio........................................3-111
Setting the Time..........................................3-61
Theft-Deterrent..........................................3-112
Understanding Reception............................3-114Rainsense™ Wipers........................................3-10
RDS Messages..............................3-66, 3-77, 3-91
Reading Lamps..............................................3-19
REAR ACCESS OPEN....................................3-59
Rear Axle......................................................5-46
Locking......................................................4-10
Rear Climate Control System............................3-28
Rear Compartment Storage Panel/Cover............2-45
Rear Door Security Locks................................2-12
Rear Floor Storage Lid....................................2-47
Rear Safety Belt Comfort Guides......................1-24
Rear Seat Audio (RSA)..................................3-111
Rear Seat Entertainment System.....................3-100
Rear Seat Operation......................................... 1-6
Rear Seat Passenger Positions.........................1-21
Rear Seat Passengers, Safety Belts..................1-21
Rear Seats (TrailBlazer EXT)............................. 1-7
Rear Storage Area..........................................2-45
Rear Underseat Fuse Block..............................5-99
Rear Window Defogger............................3-23, 3-27
Rearview Mirror, Automatic Dimming
with OnStar
®and Compass..........................2-34
Reclining Seatbacks.......................................... 1-4
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-44
Reduced Engine Power Light............................3-45
Remote Control.............................................3-105
Remote Keyless Entry System............................ 2-5
Remote Keyless Entry System, Operation............ 2-6
11

T
Table............................................................2-48
Tachometer....................................................3-34
Taillamps
Turn Signal Lamps......................................5-48
Testing the Alarm............................................2-17
Theft-Deterrent, Radio....................................3-112
Theft-Deterrent Systems...................................2-16
Content Theft-Deterrent................................2-16
Passlock
®...................................................2-17
Throttle, Adjustable..........................................2-21
TIGHTEN FUEL CAP......................................3-60
Tilt Wheel........................................................ 3-7
Tire Sidewall Labeling......................................5-52
Tire Size.......................................................5-56
Tire Terminology and Denitions........................5-57
Tires.............................................................5-52
Buying New Tires........................................5-63
Chains.......................................................5-67
Changing a Flat Tire....................................5-68
If a Tire Goes Flat.......................................5-67
Ination - Tire Pressure................................5-60
Inspection and Rotation................................5-61
Spare Tire..................................................5-83
Uniform Tire Quality Grading.........................5-64
Wheel Alignment and Tire Balance.................5-65
Wheel Replacement.....................................5-65
When It Is Time for New Tires......................5-62
To Use the Engine Coolant Heater....................2-21Top Strap......................................................1-36
Top Strap Anchor Location...............................1-37
Torque Lock...................................................2-31
Total Weight on Your Vehicle’s Tires..................4-57
Towing
Recreational Vehicle.....................................4-44
Towing a Trailer..........................................4-53
Your Vehicle...............................................4-44
Traction
Assist System (TAS)...................................... 4-9
Trailer Brakes.................................................4-58
Trailer Wiring Harness.....................................4-63
Transfer Case................................................5-46
Transmission
Fluid, Automatic...........................................5-21
Transmission Operation, Automatic....................2-22
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-12
Transportation Options...................................... 7-8
Travel Note Recorder......................................2-43
Traveling to Remote Areas...............................4-17
Trip Information..............................................3-49
Trip Odometer................................................3-34
Turn and Lane Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-58
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-60
Two-Wheel-Drive Vehicles................................4-45
14