2007 CHEVROLET TRAIL BLAZER coolant temperature

How to Add Automatic
Transmission Fluid
Refer to the Maintenance Schedule to determine
what kind of transmission uid to use. See
Recommended Fluids and Lubricants on page 529.
Add uid only after checking the transmission
uid while it is hot. A cold check is used only as
a reference. If the uid level is low, add only
enough of the proper uid to bring the level up to
the HOT area for a hot check. It does not take
much uid, generally less than one pint (0.5 L).
Do not overll.
Notice:Use of the incorrect automatic
transmission uid may damage your vehicle,
and the damages may not be covered by
your warranty. Always use the automatic
transmission uid listed inRecommended
Fluids and Lubricants on page 529.
After adding uid, recheck the uid level as
described under “How to Check Automatic
Transmission Fluid,” earlier in this section.
When the correct uid level is obtained, push
the dipstick back in all the way; then ip the
handle down to lock the dipstick in place.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs
rst, if you add only DEX-COOL
®extended
life coolant.
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 418.
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.
414

Radiator 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.
SeeEngine Compartment Overview on page 396
for information on location.
Engine Overheating
You will nd a coolant temperature gage on your
vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 211for more
information.
If your vehicle has a Driver Information Center
(DIC), the display will show an Engine Coolant
Hot/Engine Overheated message. SeeDIC
Warnings and Messages on page 224for more
information.
If Steam Is Coming From Your Engine
{CAUTION:
Steam from an overheated engine can
burn you badly, even if you just open the
hood. Stay away from the engine if you
see or hear steam coming from it. Just
turn it off and get everyone away from the
vehicle until it cools down. Wait until
there is no sign of steam or coolant
before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch re.
You or others could be badly burned.
Stop your engine if it overheats, and get
out of the vehicle until the engine is cool.
Notice:If your engine catches re because
you keep driving with no coolant, your vehicle
can be badly damaged. The costly repairs
would not be covered by your warranty.
418

6. Start the engine and let it run until you can
feel the upper radiator hose getting hot.
Watch out for the engine cooling fan.
7. By this time, the coolant level inside the
radiator ller neck may be lower. If the level is
lower, add more of the proper DEX-COOL
®
coolant mixture through the ller neck until the
level reaches the base of the ller neck.
8. Then replace the pressure cap. At any time
during this procedure if coolant begins to ow
out of the ller neck, reinstall the pressure
cap. Be sure the pressure cap is hand-tight
and fully seated.
Engine Fan Noise
Your vehicle has a clutched engine cooling fan.
When the clutch is engaged, the fan spins faster
to provide more air to cool the engine. In most
everyday driving conditions the clutch is not
engaged. This improves fuel economy and reduces
fan noise. Under heavy vehicle loading, trailer
towing, and/or high outside temperatures, the fan
speed increases when the clutch engages so
you may hear an increase in fan noise. This is
normal and should not be mistaken as the
transmission slipping or making extra shifts. It is
merely the cooling system functioning properly.
The fan will slow down when additional cooling is
not required and the clutch disengages.
You may also hear this fan noise when you start
the engine. It will go away as the fan clutch
disengages.
425

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.
Adding Washer Fluid
Open the cap with the
washer symbol on it.
Add washer uid
until the tank is full. See
Engine Compartment
Overview on page 396
for reservoir location.Notice:
When using concentrated washer uid,
follow the manufacturer’s instructions
for adding water.
Do not 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 does not clean as well
as washer uid.
Fill the washer uid tank only
three-quarters full when it is very cold.
This allows for uid expansion if freezing
occurs, which could damage the tank if it is
completely full.
Do not use engine coolant (antifreeze) in
your windshield washer. It can damage
the vehicle’s windshield washer system
and paint.
427

(e)Make sure the safety belt reminder light and all
your belts, buckles, latch plates, retractors, and
anchorages are working properly. Look for
any other loose or damaged safety belt system
parts. If you see anything that might keep a safety
belt system from doing its job, have it repaired.
Have any torn or frayed safety belts replaced. Also
look for any opened or broken airbag coverings,
and have them repaired or replaced. The
airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders, hood latch
assembly, secondary latch, pivots, spring anchor,
release pawl, rear compartment hinges, outer
liftgate handle pivot points, rear door detent link,
roller mechanism, liftgate handle pivot points, latch
bolt, fuel door hinge, cargo 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)Inspect hoses for cracks, chang, leaks, 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/retailer perform this service. See
Engine Coolant on page 414 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)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(l)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
524

Cleaning (cont.)
Climate Control System
Dual......................................................... 187
Dual Automatic......................................... 190
Outlet Adjustment..................................... 195
Rear........................................................ 196
Clock.......................................................... 239
Collision Damage Repair............................. 549
Comfort Guides, Rear Safety Belt................. 37
Compass..........................133, 135, 138, 140
Competitive Driving..................................... 323
Content Theft-Deterrent............................... 108
Control of a Vehicle..................................... 310
Convenience Net......................................... 164
Coolant
Engine Temperature Gage........................ 211
Heater, Engine......................................... 116
Cooling System........................................... 420
Cruise Control............................................. 177
Cruise Control Light.................................... 217
Customer Assistance Information
Courtesy Transportation........................... 546
Customer Assistance for Text
Telephone (TTY) Users......................... 542
Customer Assistance Offices.................... 542
Customer Satisfaction Procedure.............. 538Customer Assistance Information (cont.)
GM Mobility Reimbursement Program...... 543
Reporting Safety Defects to General
Motors.................................................. 553
Reporting Safety Defects to the
Canadian Government.......................... 553
Reporting Safety Defects to the
United States Government.................... 552
Roadside Assistance Program.................. 544
Service Publications Ordering
Information........................................... 554
D
Daytime Running Lamps............................. 181
Defensive Driving........................................ 306
Delayed Locking.......................................... 100
Disc, MP3................................................... 274
Doing Your Own Service Work.................... 387
Dome Lamp Override.................................. 184
Dome Lamps............................................... 183
Door
Delayed Locking...................................... 100
Locks......................................................... 98
Power Door Locks..................................... 99
Programmable Automatic Door Locks....... 100
Rear Door Security Locks........................ 103
562

Driver
Position, Safety Belt................................... 25
Driver Information Center (DIC)................... 220
DIC Operation and Displays..................... 221
DIC Vehicle Customization....................... 231
DIC Warnings and Messages................... 224
Driving
At Night................................................... 339
City.......................................................... 344
Defensive................................................. 306
Drunken................................................... 307
Freeway................................................... 345
Hill and Mountain Roads.......................... 348
In Rain and on Wet Roads...................... 340
Off-Road.................................................. 323
Recovery Hooks....................................... 355
Rocking Your Vehicle to Get it Out.......... 354
Winter...................................................... 350
Dual Automatic Climate Control System....... 190
Dual Climate Control System....................... 187
DVD
Rear Seat Entertainment System............. 284E
EDR ............................................................ 555
Electrical System
Add-On Equipment................................... 502
Engine Compartment Fuse Block............. 503
Fuses and Circuit Breakers...................... 503
Headlamps............................................... 502
Power Windows and Other Power
Options................................................. 502
Rear Underseat Fuse Block..................... 509
Windshield Wiper Fuses........................... 502
Electronically Controlled Air Suspension
System.................................................... 367
Engine
Air Cleaner/Filter...................................... 410
Change Engine Oil Light.......................... 216
Check and Service Engine Soon Light..... 212
Coolant.................................................... 414
Coolant Heater......................................... 116
Coolant Temperature Gage...................... 211
Drive Belt Routing.................................... 533
Engine Compartment Overview................ 396
Exhaust................................................... 130
Fan Noise................................................ 425
Oil ........................................................... 402
Oil Life System........................................ 408
563

G
Gage
Check Gages Warning Light..................... 218
Engine Coolant Temperature.................... 211
Fuel......................................................... 219
Oil Pressure............................................. 215
Speedometer........................................... 200
Tachometer.............................................. 201
Voltmeter Gage........................................ 207
Garage Door Opener................................... 150
Gasoline
Octane..................................................... 388
Specications........................................... 389
Gate Ajar Light............................................ 218
Glove Box................................................... 161
GM Mobility Reimbursement Program.......... 543
H
Hazard Warning Flashers............................ 172
Head Restraints............................................ 17
Headlamps.................................................. 180
Bulb Replacement.................................... 442
Daytime Running Lamps.......................... 181
Electrical System..................................... 502
Flash-to-Pass........................................... 175
Halogen Bulbs......................................... 442Headlamps (cont.)
High/Low Beam Changer......................... 175
On Reminder........................................... 181
Heated Seats................................................ 11
Heater......................................................... 187
Heater......................................................... 190
Highbeam On Light..................................... 217
High-Speed Operation, Tires........................ 458
Highway Hypnosis....................................... 347
Hill and Mountain Roads............................. 348
Hood
Checking Things Under............................ 394
Release................................................... 394
Horn............................................................ 172
How to Use This Manual................................ 4
How to Wear Safety Belts Properly............... 25
I
Ignition Positions......................................... 112
Infants and Young Children, Restraints.......... 44
Ination - Tire Pressure............................... 457
Instrument Panel
Overview.................................................. 170
Instrument Panel (I/P)
Brightness................................................ 183
Cluster..................................................... 199
565