engine overheat CHEVROLET AVALANCHE 2007 2.G Owner's Manual

Cooling System
When you decide it is safe to lift the hood,
here is what you will see:
A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Cooling Fan(s){CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not
running. Keep hands, clothing, and tools
away from any underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
If possible, the vehicle should be parked on a
level surface. Check the coolant level after
the system cools down. Some amount of coolant
may be lost due to overheating.
5.3L Engine (6.0L Similar)
464

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. SeeOverheated Engine Protection
Operating Mode on page 463for 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 could 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.
465

{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.
{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.
467

Driving (cont.)
Freeway................................................... 391
Hill and Mountain Roads.......................... 394
In Rain and on Wet Roads...................... 387
Off-Road.................................................. 368
Recovery Hooks....................................... 401
Rocking Your Vehicle to Get it Out.......... 400
Winter...................................................... 396
Dual Automatic Climate Control System....... 230
Dual Climate Control System....................... 227
DVD
Rear Seat Entertainment System............. 334
E
Electric Power Management........................ 220
Electrical System
Add-On Equipment................................... 547
Center Instrument Panel Fuse Block........ 550
Fuses and Circuit Breakers...................... 548
Instrument Panel Fuse Block................... 548
Power Windows and Other Power
Options................................................. 547
Underhood Fuse Block............................. 551
Windshield Wiper Fuses........................... 547Engine
Air Cleaner/Filter...................................... 451
Battery..................................................... 475
Check and Service Engine Soon Light..... 250
Coolant.................................................... 457
Coolant Heater......................................... 126
Coolant Temperature Gage...................... 249
Drive Belt Routing.................................... 577
Engine Compartment Overview ................ 444
Exhaust................................................... 143
Fan Noise................................................ 469
Oil ........................................................... 446
Oil Life System........................................ 449
Overheated Protection Operating Mode...... 463
Overheating............................................. 460
Starting.................................................... 124
Entry/Exit Lighting....................................... 220
Event Data Recorders (EDR)...................... 594
Extender, Safety Belt..................................... 44
Exterior Cargo Lamps................................. 219
Exterior Lamps............................................ 215
607

O
Odometer.................................................... 241
Odometer, Trip............................................ 241
Off-Road Driving.......................................... 368
Off-Road Recovery...................................... 365
Oil
Engine..................................................... 446
Pressure Gage......................................... 253
Pressure Light.......................................... 254
Oil, Engine Oil Life System......................... 449
Older Children, Restraints............................. 45
Online Owner Center................................... 585
OnStar
®System, see OnStar®Manual........ 156
Operation, Universal Home
Remote System..............................161, 166
Other Warning Devices................................ 206
Outlet Adjustment........................................ 238
Outlet(s), Accessory Power.......................... 226
Outside
Power Foldaway Mirrors........................... 153
Power Mirrors.......................................... 152
Overheated Engine Protection
Operating Mode....................................... 463
Owner Checks and Services....................... 570
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 544
Park Aid...................................................... 222
Park (P)
Shifting Into............................................. 139
Shifting Out of......................................... 141
Parking
Assist....................................................... 222
Brake....................................................... 138
Over Things That Burn............................ 142
Passenger Airbag Status Indicator............... 243
Passenger Sensing System........................... 81
Passing....................................................... 365
PASS-Key
®III+........................................... 120
PASS-Key®III+ Operation........................... 121
Power
Accessory Outlet(s).................................. 226
Door Locks.............................................. 103
Electrical System..................................... 547
Lumbar Controls........................................ 11
Retained Accessory (RAP)....................... 124
Running Boards....................................... 115
Seat.......................................................... 10
Steering Fluid.......................................... 469
Windows.................................................. 117
612