2004 CHEVROLET TAHOE overheating

Coolant Surge Tank Pressure Cap
SeeEngine Compartment
Overview on page 5-14for
more information on
location.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank.
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
You will nd a coolant temperature gage on your
vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 3-47. In addition, you will
nd an ENGINE OVERHEATED, and a REDUCED
ENGINE POWER message in the DIC on the instrument
panel. SeeDriver Information Center (DIC) on
page 3-56.
Overheated Engine Protection
Operating Mode (V8 Engines Only)
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 5-17.
5-29

If Steam Is Coming From Your Engine
{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 5-29
for information on driving to a safe place in an
emergency.
5-30

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 5-29for 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. SeeLow Coolant
underDIC Warnings and Messages on page 3-68.
If you get an engine overheat warning with and do not
have a low coolant condition, 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 4-65.If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. In heavy traffic, let the engine idle in neutral while
stopped. If it is safe to do so, pull off the road. Shift
to park or neutral and let the engine idle.
2. Turn on your heater to full hot at the highest fan
speed and open the window as necessary.
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning doesn’t come back on, you can drive
normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there’s still no sign of steam, you can push down the
accelerator until the engine speed is about twice as
fast as normal idle speed for at least three minutes while
you’re parked. If you still have the warning,turn off
the engine and get everyone out of the vehicleuntil it
cools down. Also, seeOverheated Engine Protection
Operating Modelisted previously in this section.
You may decide not to lift the hood but to get service
help right away.
5-31

To replace the windshield wiper blade assembly do the
following:
1. Lift the wiper arm and turn the blade until it is
facing away from the windshield.
2. Push the release lever and slide the wiper assembly
toward the driver’s side of the vehicle.
3. Install a new blade by reversing Steps 1 and 2.
Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service,
see your GM Warranty booklet for details. For additional
information refer to the tire manufacturer’s booklet
included with your vehicle’s Owner’s Manual.
{CAUTION:
Poorly maintained and improperly used tires
are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and
a serious accident. See “Loading Your
Vehicle” in the Index.
Underinated tires pose the same danger
as overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.
Overinated tires are more likely to be
cut, punctured or broken by a sudden
impact — such as when you hit a pothole.
Keep tires at the recommended pressure.
Worn, old tires can cause accidents.
If your tread is badly worn, or if your
tires have been damaged, replace them.
5-61

Driving with a Trailer.......................................4-74
Dual Automatic Climate Control System.............3-27
Dual Climate Control System............................3-23
DVD
Rear Seat Entertainment System..................3-123
DVD Distortion..............................................3-133
DVD Messages.............................................3-133
DVD Player..................................................3-126
E
Easy Exit Seat...............................................2-68
Electrical System
Add-On Equipment.....................................5-110
Fuses and Circuit Breakers.........................5-110
Power Windows and Other Power Options....5-110
Windshield Wiper Fuses.............................5-110
Emissions Inspection and Maintenance
Programs...................................................3-52
Engine
Air Cleaner/Filter.........................................5-22
Battery.......................................................5-44
Check and Service Engine Soon Light............3-50
Coolant......................................................5-26
Coolant Heater............................................2-24
Coolant Temperature Gage...........................3-47
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14Engine (cont.)
Exhaust.....................................................2-43
Fan Noise..................................................5-37
Oil .............................................................5-17
Overheating................................................5-29
Starting......................................................2-23
ENGINE COOLANT HOT.................................3-70
Engine Hour Meter Display...............................3-41
Engine Oil Additives........................................5-20
ENGINE OVERHEATED..................................3-70
Entering or Exiting the Third Row Seats.............1-10
Entry Lighting.................................................3-19
Environmental Concerns..................................4-27
Erasing HomeLink
®Buttons..............................2-61
Event Data Recorders (EDR)............................. 7-9
Exit Lighting...................................................3-19
Express-Down Windows...................................2-17
Extender, Safety Belt.......................................1-47
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-22
Finding a Program Type (PTY) Station
(RDS and XM™).......................3-85, 3-97, 3-112
Finding a Station..................3-78, 3-83, 3-95, 3-110
Finish Care..................................................5-104
6