towing HUMMER H2 2004 Owner's Guide

Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
REDUCED ENGINE POWER message is displayed, an
overheat protection mode which alternates ring
groups of cylinders helps prevent engine damage. In
this mode, you will notice a loss in power and engine
performance. This operating mode allows your vehicle to
be driven to a safe place in an emergency. Driving
extended miles (km) and/or towing a trailer in the
overheat protection mode should be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any
repair. The engine oil will be severely degraded.
Repair the cause of coolant loss, change the oil and
reset the oil life system. SeeEngine Oil on
page 5-14.
If Steam Is Coming From Your Engine
5-28

{CAUTION:
Steam from an overheated engine can burn
you badly, even if you just open the hood. Stay
away from the engine if you see or hear steam
coming from it. Just turn it off and get
everyone away from the vehicle until it cools
down. Wait until there is no sign of steam or
coolant before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch re. You
or others could be badly burned. Stop your
engine if it overheats, and get out of the
vehicle until the engine is cool.
See “Overheated Engine Protection Operating
Mode” underEngine Overheating on page 5-27
for information on driving to a safe place in an
emergency.Notice:If your engine catches re because you
keep driving with no coolant, your vehicle can
be badly damaged. The costly repairs would not be
covered by your warranty. See “Overheated
Engine Protection Operating Mode” underEngine
Overheating on page 5-27for information on driving
to a safe place in an emergency.
If No Steam Is Coming From Your
Engine
An overheat warning, along with a low coolant condition,
can indicate a serious problem.
If you get an engine overheat, but see or hear no
steam, the problem may not be too serious. Sometimes
the engine can get a little too hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
Idle for long periods in traffic.
Tow a trailer. SeeTowing a Trailer on page 4-75.
5-29

5. With the coolant surge tank pressure cap off, start
the engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the
engine cooling fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge tank
until the level reaches FULL COLD mark.
6. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
Engine Fan Noise
Your 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 fan is spinning
slower and the clutch is not fully engaged. This
improves fuel economy and reduces fan noise. Under
heavy vehicle loading, trailer towing and/or high outside
temperatures, the fan speed increases as the clutch
more fully 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 partially
disengages.
5-35

(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 5-24for 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.Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure the safety,
dependability and emission control performance of your
vehicle. Your GM Goodwrench dealer can assist you
with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-12.
At Each Fuel Fill
It is important 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 5-14for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
6-9

Cleaning the Windshield, Backglass and Wiper
Blades.......................................................5-97
Cleaning Tires................................................5-98
Cleaning Vinyl................................................5-93
Cleaning Wood Panels....................................5-94
Climate Control System
Automatic...................................................3-19
Climate Controls Personalization....................3-25
Outlet Adjustment........................................3-25
Compass Calibration.......................................2-35
Compass Operation.........................................2-35
Compass Variance..........................................2-36
Content Theft-Deferrent....................................2-16
Control of a Vehicle.......................................... 4-6
Coolant
Engine Temperature Gage............................3-35
Heater, Engine............................................2-21
Surge Tank Pressure Cap.............................5-27
Cooling System..............................................5-30
Corner Roof Marker Lamps..............................5-55
Crossing Obstacles.........................................4-30
Cruise Control.................................................. 3-9
Cruise Control Light........................................3-42
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........................... 7-4Customer Assistance Information (cont.)
Customer Satisfaction Procedure..................... 7-2
GM Mobility Program for Persons with
Disabilities................................................ 7-5
Reporting Safety Defects to General Motors....7-10
Reporting Safety Defects to the Canadian
Government............................................7-10
Reporting Safety Defects to the United States
Government............................................7-10
Roadside Assistance Program......................... 7-5
Service Publications Ordering Information........7-11
D
Daytime Running Lamps..................................3-15
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-24
Delayed Locking............................................... 2-9
Dinghy Towing................................................4-66
Doing Your Own Service Work........................... 5-4
Dolly Towing..................................................4-66
Dome Lamps.................................................3-17
Door
Delayed Locking........................................... 2-9
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-11
4

Low Fuel Warning Light...................................3-43
Luggage Carrier..............................................2-46
Lumbar
Power Controls............................................. 1-3
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month................................6-10
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-8
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.....................4-84
Making Turns.................................................4-82
Malfunction Indicator Light................................3-38
Matching Transmitter(s) to Your Vehicle............... 2-5
Memory Seat.................................................2-51Message
DIC Warnings and Messages........................3-56
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands) – Customer Assistance....................... 7-4
Mirrors
Automatic Dimming Rearview with Compass
and Temperature Display...........................2-34
Outside Automatic Dimming Mirror with Curb
View Assist.............................................2-39
Outside Convex Mirror.................................2-38
Outside Heated Mirrors................................2-39
Outside Power Mirrors..................................2-37
MyGMLink.com................................................ 7-3
N
Navigation/Radio System..................................3-86
New Vehicle Break-In......................................2-18
Normal Maintenance Replacement Parts............6-14
O
Odometer......................................................3-28
Off-Road Driving.............................................4-17
Off-Road Lamps.............................................3-16
9

Power Steering...............................................4-12
Power Winch Platform (If Equipped)..................4-62
Programmable Automatic Door Locks.................. 2-9
Programming the HomeLink
®Transmitter...........2-42
Q
Questions and Answers About Safety Belts.........1-21
R
Radio Data System (RDS).......................3-66, 3-77
Radio Messages.............................................3-69
Radios..........................................................3-62
Care of Your Cassette Tape Player................3-90
Care of Your CD Player...............................3-92
Care of Your CDs........................................3-92
Navigation/Radio System..............................3-86
Radio with Cassette and CD.........................3-63
Radio with Six-Disc CD................................3-74
Rear Seat Audio..........................................3-87
Setting the Time..........................................3-62
Theft-Deterrent............................................3-88
Understanding Reception..............................3-90
RDS Messages......................................3-68, 3-79Reading Lamps..............................................3-17
REAR ACCESS OPEN....................................3-61
Rear Axle......................................................5-50
Locking......................................................4-11
Rear Door Security Locks................................2-11
Rear Heated Seats........................................... 1-8
Rear Safety Belt Comfort Guides......................1-34
Rear Seat Armrest..........................................2-49
Rear Seat Audio Controls.................................3-87
Rear Seat Audio (RSA)....................................3-87
Rear Seat Operation......................................... 1-7
Rear Seat Passengers, Safety Belts..................1-30
Rear Window Defogger....................................3-24
Rearview Mirror, Automatic Dimming with
Compass and Temperature Display................2-34
Reclining Seatbacks.......................................... 1-5
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-65
REDUCED ENGINE POWER...........................3-57
Remote Keyless Entry System............................ 2-3
Remote Keyless Entry System, Operation............ 2-4
Removing the Flat Tire and Installing the
Spare Tire..................................................5-83
Removing the Seat.........................................1-13
Removing the Spare Tire and Tools...................5-80
REPLACE LIFTGATE FUSE.............................3-61
11

Sunroof.........................................................2-50
Suspension....................................................4-74
T
Tachometer....................................................3-28
Taillamps.......................................................5-57
Temperature Display........................................2-35
Testing the Alarm............................................2-17
Theft-Deterrent, Radio.....................................3-88
Theft-Deterrent Systems...................................2-16
Content Theft-Deterrent................................2-16
Passlock
®...................................................2-18
Third Row Seat..............................................1-10
TIGHTEN FUEL CAP......................................3-59
Tilt Wheel........................................................ 3-5
Tilting the Seat...............................................1-11
Tire Sidewall Labeling......................................5-60
Tire Size.......................................................5-64
Tire Terminology and Denitions........................5-65
Tires.............................................................5-60
Buying New Tires........................................5-71
Chains.......................................................5-75
Changing a Flat Tire....................................5-79
If a Tire Goes Flat.......................................5-78
Ination - Tire Pressure................................5-68
Inspection and Rotation................................5-69
Spare Tire..................................................5-92
Uniform Tire Quality Grading.........................5-72Tires (cont.)
Wheel Alignment and Tire Balance.................5-73
Wheel Replacement.....................................5-74
When It Is Time for New Tires......................5-70
To Use the Engine Coolant Heater....................2-21
Top Strap......................................................1-48
Top Strap Anchor Location...............................1-49
Torque Lock...................................................2-32
Total Weight on Your Vehicle’s Tires..................4-79
Tow/Haul Mode...............................................2-25
Tow/Haul Mode Light.......................................3-42
Towing
Recreational Vehicle.....................................4-65
Towing a Trailer..........................................4-75
Your Vehicle...............................................4-65
Traction
Control System (TCS).................................... 4-9
Off Light.....................................................3-35
TRACTION ACTIVE........................................3-59
Trailer Recommendations.................................4-75
Trailer Brakes.................................................4-81
Trailer Wiring Harness.....................................4-84
TRANS HOT IDLE ENGINE.............................3-60
Transfer Case................................................5-48
Transfer Case Buttons.....................................2-25
Transmission
Fluid, Automatic...........................................5-21
Temperature Gage.......................................3-36
14

TRANSMISSION HOT.....................................3-59
Transmission Operation, Automatic....................2-22
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-11
Transportation Options...................................... 7-7
Traveling to Remote Areas...............................4-23
Trip Information Button....................................3-45
Turn and Lane Change Signals.......................... 3-6
TURN SIGNAL ON.........................................3-58
Turn Signal/Multifunction Lever........................... 3-6
Turn Signals When Towing a Trailer..................4-82
U
Underhood Fuse Block...................................5-106
Understanding Radio Reception........................3-90
Unfolding the Seatback....................................1-10
Uniform Tire Quality Grading............................5-72
United States – Customer Assistance.................. 7-4
Used Replacement Wheels..............................5-75
Using HomeLink
®...........................................2-44
Using Song List Mode.....................................3-84
Using the Recovery Loops...............................4-57
V
Vehicle
Control........................................................ 4-6
Damage Warnings........................................... ivVehicle (cont.)
Loading......................................................4-67
Symbols......................................................... iv
Vehicle Data Collection and Event Data Records..... 7-9
Vehicle Identication
Number (VIN)............................................5-101
Service Parts Identication Label..................5-101
Vehicle Personalization
Memory Seat..............................................2-51
Vehicle Storage..............................................5-42
Ventilation Adjustment......................................3-25
Visors...........................................................2-16
Voltmeter Gage..............................................3-32
W
Warning Lights, Gages and Indicators................3-26
Warnings
DIC Warnings and Messages........................3-56
Hazard Warning Flashers............................... 3-4
Other Warning Devices.................................. 3-5
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washing Your Vehicle......................................5-95
Weight of the Trailer........................................4-78
Weight of the Trailer Tongue.............................4-79
What Kind of Engine Oil to Use........................5-15
What to Do with Used Oil................................5-18
15