coolant temperature CHEVROLET AVALANCHE 2007 2.G User Guide

The following explains your cooling system and
how to add coolant when it is low. If you have
a problem with engine overheating, seeEngine
Overheating on page 460.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as
they should.
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
the rst maintenance service after each
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.
What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL®coolant which will
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
{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.
458

Adding Coolant
If you need more coolant, add the proper
DEX-COOL®coolant mixture at the surge tank,
but only when the engine is cool. SeeCooling
System on page 464.
{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.
When replacing the pressure cap, make sure
it is hand-tight and fully seated.
Coolant Surge Tank Pressure Cap
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.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. SeeEngine
Compartment Overview on page 444for more
information on location.
Engine Overheating
You will nd a coolant temperature gage on your
vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 249.
In addition, you will nd an ENGINE
OVERHEATED STOP ENGINE, ENGINE
OVERHEATED IDLE ENGINE, and an ENGINE
POWER IS REDUCED message in the Driver
Information Center (DIC) on the instrument panel.
SeeDIC Warnings and Messages on page 267.
460

5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
6. Verify coolant level after engine is shut off
and the coolant is cold. If necessary, repeat
coolant ll procedure steps 1 through 6.
Engine Fan Noise
Your vehicle has electric cooling fans, you may
hear the fans spinning at low speed during
most everyday driving. The fans may turn off if no
cooling is required. Under heavy vehicle loading,
trailer towing, and/or high outside temperatures,
or if you are operating your air conditioning
system, the fans may change to high speed and
you may hear an increase in fan noise. This
is normal and indicates that the cooling system
is functioning properly. The fans will change to
low speed when additional cooling is no longer
required.
Power Steering Fluid
SeeEngine
Compartment Overview
on page 444for
reservoir location.
When to Check Power Steering Fluid
It is not necessary to regularly check power
steering uid unless you suspect there is a leak
in the system or you hear an unusual noise.
A uid loss in this system could indicate a problem.
Have the system inspected and repaired.
469

(f)Lubricate all key lock cylinders, hood latch
assembly, secondary latch, pivots, spring anchor,
release pawl, midgate hinges, side storage
box door hinges, tailgate hinges, tailgate linkage,
outer tailgate handle pivot points, latch bolt,
fuel door hinge, locks, and folding seat hardware.
More frequent lubrication may be required
when exposed to a corrosive environment.
Applying silicone grease on weatherstrips with a
clean cloth will make them last longer, seal better,
and not stick or squeak.
(g)Check vent hose at transfer case for kinks and
proper installation.
(h)Change automatic transmission uid and lter
if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C)
or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or
delivery service.(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 457 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and ller neck. Pressure test the cooling
system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
(k)Inspect system. Check all fuel and vapor lines
and hoses for proper hook-up, routing, and
condition. Check that the purge valve works
properly, if equipped. Replace as needed.
(l)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(m)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
569

Content Theft-Deterrent............................... 118
Control of a Vehicle..................................... 356
Coolant
Engine Temperature Gage........................ 249
Heater, Engine......................................... 126
Surge Tank Pressure Cap........................ 460
Cooling System........................................... 464
Cruise Control............................................. 212
Cruise Control Light.................................... 255
Cupholder(s)................................................ 170
Customer Assistance Information
Courtesy Transportation........................... 592
Customer Assistance for Text
Telephone (TTY) Users......................... 586
Customer Assistance Offices.................... 586
Customer Satisfaction Procedure.............. 582
GM Mobility Reimbursement Program...... 588
Reporting Safety Defects to
General Motors..................................... 600
Reporting Safety Defects to the
Canadian Government.......................... 599
Reporting Safety Defects to the
United States Government.................... 599
Roadside Assistance Program.................. 588
Service Publications Ordering
Information........................................... 600D
Daytime Running Lamps............................. 216
Defensive Driving........................................ 352
Delayed Locking.......................................... 103
Disc, MP3..........................................319, 325
Doing Your Own Service Work.................... 434
Dome Lamp Override.................................. 220
Dome Lamps............................................... 220
Door
Delayed Locking...................................... 103
Locks....................................................... 102
Power Door Locks................................... 103
Programmable Automatic Door Locks....... 103
Rear Door Security Locks........................ 104
Driver
Position, Safety Belt................................... 26
Driver Information Center (DIC)................... 257
DIC Operation and Displays............258, 264
DIC Vehicle Customization....................... 278
DIC Warnings and Messages................... 267
Driving
At Night................................................... 385
City.......................................................... 390
Defensive................................................. 352
Drunken................................................... 353
606

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

F
Filter
Engine Air Cleaner................................... 451
Finish Damage............................................ 544
Fixed Mast Antenna.................................... 349
Flashers, Hazard Warning........................... 206
Flash-to-Pass.............................................. 209
Flat Tire...................................................... 515
Flat Tire, Changing...................................... 516
Flat Tire, Storing......................................... 533
Fluid
Automatic Transmission............................ 454
Power Steering........................................ 469
Windshield Washer.................................. 470
Fog Lamp Light........................................... 255
Fog Lamps.................................................. 218
Four-Wheel Drive...............................132, 483
Front Armrest Storage Area......................... 171
Front Axle................................................... 484
Fuel............................................................ 435
Additives.................................................. 437
California Fuel.......................................... 436
E85 (85% Ethanol)................................... 438
Filling a Portable Fuel Container.............. 442
Filling Your Tank...................................... 440
Fuels in Foreign Countries....................... 439Fuel (cont.)
Gage....................................................... 256
Gasoline Octane...................................... 436
Gasoline Specications............................ 436
Fuses
Center Instrument Panel Fuse Block........ 550
Fuses and Circuit Breakers...................... 548
Instrument Panel Fuse Block................... 548
Underhood Fuse Block............................. 551
Windshield Wiper..................................... 547
G
Gage
Engine Coolant Temperature.................... 249
Fuel......................................................... 256
Oil Pressure............................................. 253
Speedometer........................................... 241
Tachometer.............................................. 241
Voltmeter Gage........................................ 246
Garage Door Opener..........................159, 160
Gasoline
Octane..................................................... 436
Specications........................................... 436
Glove Box................................................... 170
GM Mobility Reimbursement Program.......... 588
608