2003 CHEVROLET AVALANCHE coolant temperature

{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. Don't spill coolant on a hot engine.
When replacing the pressure cap, make sure it is
hand-tight.
Coolant Surge Tank Pressure Cap
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. SeeEngine
Compartment Overview on page 5-12for more
information on location.
Notice:Your pressure cap is a pressure-type cap
and must be tightly installed to prevent coolant loss
and possible engine damage from overheating.
See ªCapacities and Speci®cationsº for more
information.
Engine Overheating
You will ®nd a coolant temperature gage on your
vehicle's instrument panel. SeeEngine Coolant
Temperature Gage on page 3-39. In addition, you will
®nd a LOW COOLANT, ENGINE COOLANT HOT,
ENGINE OVERHEATED and a REDUCED ENGINE
POWER message in the DIC on the instrument panel.
See
DIC Warnings and Messages on page 3-57.
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. See ªEngine Oilº in the
Index.
5-27

Windshield Washer Fluid
What to Use
When you need windshield washer ¯uid, be sure to read
the manufacturer's instructions before use. If you will
be operating your vehicle in an area where the
temperature may fall below freezing, use a ¯uid that has
sufficient protection against freezing. See
Engine
Compartment Overview on page 5-12for reservoir
location.
Adding Washer Fluid
Your vehicle has a low washer ¯uid message that
comes on when the washer ¯uid is low. The message is
displayed for 15 seconds at the start of each ignition
cycle. When the LOW WASHER FLUID message
is displayed, you will need to add washer ¯uid to the
windshield washer ¯uid reservoir.
The windshield washer
¯uid reservoir is located in
the engine compartment
toward the front of the
vehicle on the driver's side.Open the cap with the washer symbol on it. Add washer
¯uid until the tank is full.
Notice:
·When using concentrated washer ¯uid, follow
the manufacturer's instructions for adding
water.
·Don't mix water with ready-to-use washer ¯uid.
Water can cause the solution to freeze and
damage your washer ¯uid tank and other parts
of the washer system. Also, water doesn't
clean as well as washer ¯uid.
·Fill your washer ¯uid tank only three-quarters
full when it's very cold. This allows for
expansion if freezing occurs, which could
damage the tank if it is completely full.
·Don't use engine coolant (antifreeze) in your
windshield washer. It can damage your
washer system and paint.
5-38

Automatic...................................................3-20
Climate Controls Personalization....................3-29
Dual..........................................................3-26
Outlet Adjustment........................................3-28
Compact Disc Messages..........................3-75, 3-89
Compass Calibration...............................2-48, 2-49
Compass Operation.........................................2-49
Compass Variance..................................2-47, 2-50
Content Theft-Deterrent....................................2-25
Control of a Vehicle.......................................... 4-6
Coolant.........................................................3-39
Engine Temperature Gage............................3-39
Heater, Engine............................................2-30
Surge Tank Pressure Cap.............................5-27
Cooling System..............................................5-30
Cruise Control Light........................................3-44
Cruise Control................................................3-10
Current and Past Model Order Forms................7-12
Customer Assistance Information........................ 7-7
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............................................7-10Customer Assistance Information (cont.)
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..................................3-14
Defensive Driving............................................. 4-2
Defogging and Defrosting.........................3-25, 3-27
Delayed Locking............................................... 2-8
Dinghy Towing................................................4-49
Doing Your Own Service Work........................... 5-4
Dolly Towing..................................................4-50
Dome Lamps.................................................3-17
Door............................................................... 2-8
Delayed Locking........................................... 2-8
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks............... 2-8
Rear Door Security Locks.............................2-11
DRIVER DOOR AJAR.....................................3-61
Driver Information Center (DIC).........................3-46
DIC Operation and Displays..........................3-46
DIC Warnings and Messages........................3-57
Driver............................................................1-16
Position, Safety Belt.....................................1-16
Driving Across an Incline..................................4-28
4

Driving Downhill..............................................4-26
Driving in Mud, Sand, Snow or Ice....................4-29
Driving in Water..............................................4-30
Driving On Grades..........................................4-66
Driving on Off-Road Hills.................................4-23
Driving on Snow or Ice....................................4-42
Driving Through Deep Standing Water...............4-35
Driving Through Flowing Water.........................4-35
Driving Uphill..................................................4-24
Driving with a Trailer.......................................4-64
Driving..........................................................4-32
At Night.....................................................4-32
City...........................................................4-36
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-37
Hill and Mountain Roads..............................4-39
In Rain and on Wet Roads...........................4-33
Winter........................................................4-41
Dual Climate Control System............................3-26
DVD Player....................................................3-90
DVD ............................................................3-103
Cleaning the Video Screen..........................3-103
Distortion..................................................3-102
Rear Seat Entertainment System...................3-90E
Easy Exit Seat...............................................2-86
Electrical System............................................5-96
Fuses and Circuit Breakers...........................5-97
Power Windows and Other Power Options......5-97
Windshield Wiper Fuses...............................5-97
Electrochromic Mirror Operation................2-46, 2-49
Emissions Inspection and Maintenance
Programs...................................................3-43
ENGINE COOLANT HOT.................................3-58
Engine Coolant Level Check.............................6-10
Engine Oil Additives........................................5-18
Engine Oil and Chassis Lubrication Scheduled
Maintenance................................................. 6-5
Engine Oil Level Check...................................6-10
ENGINE OVERHEATED..................................3-58
Engine..........................................................5-20
Air Cleaner/Filter.........................................5-20
Battery.......................................................5-42
Check and Service Engine Soon Light............3-41
Compartment Overview................................5-12
Coolant Heater............................................2-30
Coolant Temperature Gage...........................3-39
Coolant......................................................5-24
Cooling System Inspection............................6-16
Exhaust.....................................................2-44
Fan Noise..................................................5-36
Oil .............................................................5-15
Overheating................................................5-27
5

G
Gage............................................................3-39
Engine Coolant Temperature.........................3-39
Fuel..........................................................3-45
Oil Pressure...............................................3-43
Speedometer..............................................3-32
Tachometer.................................................3-33
Transmission Temperature.............................3-40
Voltmeter Gage...........................................3-36
Garage Door Opener.......................................2-55
Gasoline......................................................... 5-5
Octane........................................................ 5-5
Speci®cations............................................... 5-5
Gate Operator and Canadian Programming........2-57
Getting Familiar with Off-Road Driving................4-21
Glove Box.....................................................2-59
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-7
Headlamp High/Low-Beam Changer.................... 3-8
Headlamps....................................................5-52
Bulb Replacement.......................................5-52
Daytime Running Lamps...............................5-58Headlamps (cont.)
Front Turn Signal, Sidemarker and Daytime
Running Lamps........................................5-56
Front Turn Signal, Sidemarker and Parking
Lamps....................................................5-55
Halogen Bulbs............................................5-52
Headphones...................................................3-96
Heated Seats................................................... 1-4
Heating.........................................................3-25
Highway Hypnosis...........................................4-39
Hill and Mountain Roads..................................4-39
Hitches..........................................................4-63
HomeLink
žTransmitter, Programming................2-56
HomeLinkžTransmitter....................................2-55
Hood............................................................5-10
Checking Things Under................................5-10
Release.....................................................5-10
Horn............................................................... 3-7
How to Add Coolant to the Coolant Surge Tank......5-32
How to Add Fluid............................................5-24
How to Check Lubricant...................................5-49
How to Check Power Steering Fluid..................5-37
How to Check........................................5-22, 5-62
How to Inspect...............................................5-20
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-16
Hydroplaning..................................................4-35
7

Tires (cont.)
Inspection and Rotation................................5-62
Spare Tire..................................................5-87
Uniform Tire Quality Grading.........................5-65
Wheel Alignment and Tire Balance.................5-67
Wheel Replacement.....................................5-67
When It Is Time for New Tires......................5-64
To Use the Engine Coolant Heater....................2-30
Tonneau Cover...............................................2-77
Top Drain Grates ± Removal and Cleaning.........2-73
Top Strap Anchor Location...............................1-43
Top Strap......................................................1-42
Top-Box Storage.............................................2-77
Torque Lock...................................................2-42
Total Weight on Your Vehicle's Tires..................4-63
Tow/Haul Mode Light.......................................3-45
Tow/Haul Mode...............................................2-33
Towing..........................................................4-48
Recreational Vehicle.....................................4-48
Towing a Trailer..........................................4-58
Your Vehicle...............................................4-48
TRACTION ACTIVE........................................3-63
Traction Control Operation................................4-13
Traction.........................................................4-10
Assist System (TAS)....................................4-10
Off Light.....................................................3-38
Stabilitrak
žSystem......................................4-12
Trailer Brakes.................................................4-64
Trailer Wiring Harness.....................................4-68
Trailer...........................................................4-58Recommendations.......................................4-58
TRANS HOT IDLE ENGINE.............................3-61
Transfer Case and Front Axle (Four-Wheel Drive)
Inspection...................................................6-16
Transfer Case................................................5-50
TRANSMISSION HOT.....................................3-61
Transmission Operation, Automatic....................2-31
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-11
Transmission..................................................5-22
Fluid, Automatic...........................................5-22
Temperature Gage.......................................3-40
Transportation Options...................................... 7-8
Traveling to Remote Areas...............................4-21
Trip Information Button....................................3-47
Truck-Camper Loading Information....................4-57
Turn and Lane Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-60
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-65
U
Underbody Flushing Service.............................6-14
Underhood Fuse Block...................................5-101
Understanding Radio Reception.......................3-102
Uniform Tire Quality Grading............................5-65
United States ± Customer Assistance.................. 7-4
Used Replacement Wheels..............................5-68
15