2005 CHEVROLET AVALANCHE heater

When the engine is cold,
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.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.
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.
5-32

How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level is not at the FULL COLD mark, add
a 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant at the coolant surge tank, but be
sure the cooling system, including the coolant surge tank
pressure cap, is cool before you do it. SeeEngine
Coolant on page 5-25for more information.
If no coolant is visible in the surge tank, add coolant as
follows:
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap — even a little — they can come
out at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have
to turn the pressure cap.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.
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.
5-33

Center Front Passenger Position, Safety Belts....1-22
Center Overhead Console................................2-57
Chains, Tire...................................................5-74
Charging System Light....................................3-34
Check
Engine Light...............................................3-40
Checking Things Under the Hood......................5-10
Chemical Paint Spotting.................................5-101
Child Restraints
Child Restraint Systems...............................1-35
Infants and Young Children...........................1-31
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-42
Older Children.............................................1-29
Securing a Child Restraint Designed
for the LATCH System..............................1-44
Securing a Child Restraint in a Rear
Seat Position...........................................1-44
Securing a Child Restraint in the Center
Front Seat Position...................................1-46
Securing a Child Restraint in the Right
Front Seat Position...................................1-46
Top Strap...................................................1-40
Top Strap Anchor Location............................1-41
Where to Put the Restraint...........................1-38
Chime Level Adjustment.................................3-104
Cigarette Lighter.............................................3-20Cleaning
Aluminum or Chrome-Plated Wheels.............5-100
Exterior Lamps/Lenses.................................5-98
Fabric/Carpet..............................................5-96
Finish Care.................................................5-98
Inside of Your Vehicle..................................5-95
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-97
Leather......................................................5-97
Tires........................................................5-100
Underbody Maintenance.............................5-101
Washing Your Vehicle...................................5-98
Weatherstrips..............................................5-98
Windshield and Wiper Blades........................5-99
Climate Control System
Dual..........................................................3-20
Dual Automatic............................................3-23
Outlet Adjustment........................................3-28
Comfort Guides, Rear Safety Belt.....................1-26
Content Theft-Deterrent....................................2-24
Control of a Vehicle.......................................... 4-5
Coolant
Engine Temperature Gage............................3-38
Heater, Engine............................................2-30
Surge Tank Pressure Cap.............................5-28
Cooling System..............................................5-30
Cruise Control................................................3-10
3

E
Electrical System...........................................5-103
Center Instrument Panel Fuse Block.............5-106
Fuses and Circuit Breakers.........................5-104
Instrument Panel Fuse Block.......................5-104
Power Windows and Other Power Options....5-104
Underhood Fuse Block...............................5-107
Windshield Wiper Fuses.............................5-104
Engine
Air Cleaner/Filter.........................................5-20
Battery.......................................................5-41
Check and Service Engine Soon Light............3-40
Coolant......................................................5-25
Coolant Heater............................................2-30
Coolant Temperature Gage...........................3-38
Engine Compartment Overview......................5-12
Exhaust.....................................................2-42
Fan Noise..................................................5-35
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-30
Overheating................................................5-28
Starting......................................................2-28
Entry/Exit Lighting...........................................3-18
Event Data Recorders (EDR)............................. 7-9
Extender, Safety Belt.......................................1-28
Exterior Cargo Lamps......................................3-17
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-20
Finish Damage.............................................5-101
Fixed Mast Antenna.......................................3-104
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-74
Flat Tire, Changing.........................................5-75
Flat Tire, Storing.............................................5-91
Fluid
Automatic Transmission................................5-22
Power Steering...........................................5-36
Windshield Washer......................................5-36
Fog Lamps....................................................3-16
Four-Wheel Drive....................................2-34, 5-48
Front Armrest Storage Area..............................2-57
Front Axle......................................................5-49
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-5
E-85 (85% Ethanol)....................................... 5-6
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
Gage.........................................................3-44
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-5
Low Warning Light.......................................3-45
5

Fuses
Center Instrument Panel Fuse Block.............5-106
Fuses and Circuit Breakers.........................5-104
Instrument Panel Fuse Block.......................5-104
Underhood Fuse Block...............................5-107
Windshield Wiper.......................................5-104
G
Gage
Engine Coolant Temperature.........................3-38
Fuel..........................................................3-44
Oil Pressure...............................................3-42
Speedometer..............................................3-31
Tachometer.................................................3-31
Transmission Temperature.............................3-38
Voltmeter Gage...........................................3-35
Garage Door Opener.......................................2-53
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
Glove Box.....................................................2-57
GM Mobility Reimbursement Program.................. 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-7
Headlamps....................................................5-50
Automatic Headlamp System.........................3-15
Bulb Replacement.......................................5-50
Daytime Running Lamps.......................3-15, 5-56
Flash-to-Pass............................................... 3-9
Front Turn Signal, Sidemarker and
Daytime Running Lamps...........................5-54
Front Turn Signal, Sidemarker and
Parking Lamps.........................................5-53
Halogen Bulbs............................................5-50
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-15
Heated Seats................................................... 1-4
Heater...........................................................3-20
Heater...........................................................3-23
Highbeam On Light.........................................3-44
Highway Hypnosis...........................................4-38
Hill and Mountain Roads..................................4-39
HomeLink
®Wireless Control System.................2-53
HomeLink®Wireless Control
System Operation........................................2-54
6