2005 CHEVROLET TAHOE heater

The coolant level should
be at or above the FULL
COLD mark. If it is not, you
may have a leak at the
pressure cap or in
the radiator hoses, heater
hoses, radiator, water
pump or somewhere else
in the cooling system.
{CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them. If
you do, you can be burned.
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine re, and you could be
burned. Get any leak xed before you drive the
vehicle.If your vehicle is equipped with an electric engine
cooling fan, check the coolant temperature gage. If the
coolant temperature is approximately 232°F (111°C),
the electric cooling fan should be running. If it is
not, your vehicle needs service. Turn off the engine.
If your vehicle is equipped with an engine-driven cooling
fan, start the engine again and see if the fan speed
increases when idle speed is doubled by pushing the
accelerator pedal down. If it does not, your vehicle
needs service. Turn off the engine.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty. See
Overheated Engine Protection Operating Mode on
page 5-30for information on driving to a safe place
in an emergency.
Notice:Using coolant other than DEX-COOL
®may
cause premature engine, heater core or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your vehicle.
5-32

Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
1. You can remove the
coolant surge tank
pressure cap when the
cooling system,
including the coolant
surge tank pressure
cap and upper radiator
hose, is no longer hot.Turn the pressure cap slowly counterclockwise
about one full turn. If you hear a hiss, wait for
that to stop. A hiss means there is still some
pressure left.
2. Then keep turning the pressure cap slowly, and
remove it.
3. Fill the coolant surge tank with the proper mixture,
to the FULL COLD mark.
5-34

Cleaning (cont.)
Washing Your Vehicle.................................5-101
Weatherstrips............................................5-101
Windshield, Backglass, and Wiper Blades......5-102
Climate Control System...................................3-21
Dual..........................................................3-22
Dual Automatic............................................3-25
Outlet Adjustment........................................3-30
Rear Air Conditioning and Heating System......3-31
Rear Air Conditioning and Heating System,
Electronic................................................3-34
Rear Air Conditioning System........................3-30
Comfort Guides, Rear Safety Belt.....................1-41
Content Theft-Deterrent....................................2-17
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-58
Coolant
Engine Temperature Gage............................3-46
Heater, Engine............................................2-23
Surge Tank Pressure Cap.............................5-28
Cooling System..............................................5-30
Cruise Control................................................3-11
Cruise Control Light........................................3-53
Cupholder(s)..................................................2-56
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text Telephone (TTY)
Users....................................................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2Customer Assistance Information (cont.)
GM Mobility Reimbursement Program............... 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..................................3-15
Defensive Driving............................................. 4-2
Delayed Locking.............................................2-10
Doing Your Own Service Work........................... 5-4
Dome Lamp Override......................................3-19
Dome Lamps.................................................3-18
Door
Delayed Locking..........................................2-10
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
Programmable Automatic Door Locks.............2-11
Rear Door Security Locks.............................2-13
Driver
Position, Safety Belt.....................................1-29
Driver Information Center (DIC).........................3-56
DIC Operation and Displays..........................3-57
DIC Vehicle Customization............................3-72
4

Driver Information Center (DIC) (cont.)
DIC Warnings and Messages........................3-60
Driving
At Night.....................................................4-37
City...........................................................4-40
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-41
Hill and Mountain Roads..............................4-44
In Rain and on Wet Roads...........................4-38
Off-Road....................................................4-22
Recovery Hooks..........................................4-51
Rocking Your Vehicle to Get it Out.................4-50
Winter........................................................4-45
Dual Automatic Climate Control System.............3-25
Dual Climate Control System............................3-22
DVD
Rear Seat Entertainment System..................3-122
E
Electrical System
Add-On Equipment.....................................5-107
Center Instrument Panel Fuse Block.............5-110
Fuses and Circuit Breakers.........................5-107
Instrument Panel Fuse Block.......................5-108
Power Windows and Other Power Options....5-107
Underhood Fuse Block...............................5-111
Windshield Wiper Fuses.............................5-107Electrical System (cont.)
Engine
Air Cleaner/Filter.........................................5-21
Battery.......................................................5-41
Check and Service Engine Soon Light............3-48
Coolant......................................................5-26
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-46
Engine Compartment Overview......................5-12
Exhaust.....................................................2-39
Fan Noise..................................................5-35
Oil .............................................................5-16
Oil Life System...........................................5-19
Overheated Protection Operating Mode...........5-30
Overheating................................................5-28
Starting......................................................2-21
Entry Lighting.................................................3-19
Event Data Recorders (EDR)............................. 7-9
Exit Lighting...................................................3-19
Extender, Safety Belt.......................................1-43F
Filter
Engine Air Cleaner......................................5-21
Finish Damage.............................................5-104
Fixed Mast Antenna.......................................3-138
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-77
Flat Tire, Changing.........................................5-78
5

Headlamps (cont.)
On Reminder..............................................3-15
Roof Marker Lamps.....................................5-55
Side Identication Marker Lamps...................5-54
Heated Seats................................................... 1-6
Heater...................................................3-21, 3-22
Heater...........................................................3-25
Highbeam On Light.........................................3-53
Highway Hypnosis...........................................4-43
Hill and Mountain Roads..................................4-44
HomeLink
®Wireless Control System.................2-52
HomeLink®Wireless Control System
Operation...................................................2-53
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-6
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-28
I
Ignition Positions.............................................2-20
Infants and Young Children, Restraints...............1-46
Ination -- Tire Pressure..................................5-66
Instrument Panel
Overview..................................................... 3-4Instrument Panel (I/P)
Brightness..................................................3-18
Cluster.......................................................3-37
J
Jump Starting.................................................5-42
K
Keyless Entry System....................................... 2-5
Keys............................................................... 2-3
L
Labelling, Tire Sidewall....................................5-61
Lamps
Auxiliary Roof Mounted Lamp........................3-18
Battery Run-Down Protection.........................3-20
Dome........................................................3-18
Dome Lamp Override...................................3-19
Fog ...........................................................3-17
Front Reading.............................................3-19
LATCH System
Child Restraints...........................................1-57
Securing a Child Restraint Designed for the
LATCH System........................................1-59
7