2007 CHEVROLET TRAIL BLAZER cooling

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the
pedal down while you:
start your engine,
shift into a gear, and
release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear
of the chocks.
4. Stop and have someone pick up and
store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when
you’re pulling a trailer. See the Maintenance
Schedule for more on this. Things that are
especially important in trailer operation are
automatic transmission uid (don’t overll), engine
oil, axle lubricant, belt(s), cooling system and
brake system. Each of these is covered in
this manual, and the Index will help you nd them
quickly. If you’re trailering, it’s a good idea to
review these sections before you start your trip.
Check periodically to see that all hitch nuts
and bolts are tight.
380

Service........................................................ 386
Accessories and Modications................... 386
California Proposition 65 Warning.............. 386
Doing Your Own Service Work.................. 387
Adding Equipment to the Outside of
Your Vehicle.......................................... 387
Fuel............................................................. 388
Gasoline Octane........................................ 388
Gasoline Specications.............................. 389
California Fuel........................................... 389
Additives................................................... 389
Fuels in Foreign Countries........................ 390
Filling the Tank......................................... 391
Filling a Portable Fuel Container............... 393
Checking Things Under the Hood.............. 394
Hood Release........................................... 394
Engine Compartment Overview.................. 396
Engine Oil................................................. 402
Engine Oil Life System.............................. 408
Engine Air Cleaner/Filter............................ 410Automatic Transmission Fluid.................... 411
Engine Coolant.......................................... 414
Radiator Pressure Cap.............................. 418
Engine Overheating................................... 418
Cooling System......................................... 420
Engine Fan Noise..................................... 425
Power Steering Fluid................................. 426
Windshield Washer Fluid........................... 427
Brakes...................................................... 428
Battery...................................................... 431
Jump Starting............................................ 432
All-Wheel Drive........................................... 438
Rear Axle.................................................... 438
Four-Wheel Drive........................................ 440
Front Axle................................................... 440
Bulb Replacement....................................... 442
Halogen Bulbs........................................... 442
Taillamps and Turn Signal Lamps............. 442
License Plate Lamp................................... 444
Replacement Bulbs................................... 444
Section 5 Service and Appearance Care
383

A. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 410.
B. Engine Coolant Recovery Tank. SeeCooling
System on page 420.
C. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 427.
D. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 426.
E. Automatic Transmission Fluid Dipstick (Out of
View). See “Checking the Fluid Level” under
Automatic Transmission Fluid on page 411.
F. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 402.G. Radiator Pressure Cap. SeeRadiator Pressure
Cap on page 418.
H. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 402.
I. Remote Negative (−) Terminal (Marked GND).
SeeJump Starting on page 432.
J. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 428.
K. Battery. SeeBattery on page 431.
L. Engine Compartment Fuse Block. SeeEngine
Compartment Fuse Block on page 503.
397

A. Engine Coolant Recovery Tank. SeeCooling
System on page 420.
B. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 410.
C. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 427.
D. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 402.
E. Automatic Transmission Fluid Dipstick.
See “Checking the Fluid Level” under
Automatic Transmission Fluid on page 411.
F. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 402.G. Radiator Pressure Cap. SeeRadiator Pressure
Cap on page 418.
H. Remote Negative (−) Terminal (Marked GND).
SeeJump Starting on page 432.
I. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 426.
J. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 428.
K. Engine Compartment Fuse Block. SeeEngine
Compartment Fuse Block on page 503.
L. Battery. SeeBattery on page 431.
399

A. Engine Coolant Recovery Tank. SeeCooling
System on page 420.
B. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 410.
C. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 427.
D. Engine Oil Dipstick (Out of View). See
“Checking Engine Oil” underEngine Oil on
page 402.
E. Automatic Transmission Fluid Dipstick.
See “Checking the Fluid Level” under
Automatic Transmission Fluid on page 411.
F. Engine Oil Fill Cap (Under Engine Cover).
See “When to Add Engine Oil” underEngine
Oil on page 402.G. Radiator Pressure Cap. SeeRadiator Pressure
Cap on page 418.
H. Remote Negative (−) Terminal (Marked GND).
SeeJump Starting on page 432.
I. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 426.
J. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 428.
K. Engine Compartment Fuse Block. SeeEngine
Compartment Fuse Block on page 503.
L. Battery. SeeBattery on page 431.
401

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

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. 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.
Notice:If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not be
covered by your warranty. Too much water
in the mixture can freeze and crack the engine,
radiator, heater core, and other parts.
415

If you have to add coolant more than four times a
year, have your dealer check your cooling system.
Notice:If you use extra inhibitors and/or
additives in your vehicle’s cooling system,
you could damage your vehicle. Use only the
proper mixture of the engine coolant listed
in this manual for the cooling system.
SeeRecommended Fluids and Lubricants
on page 529for more information.Checking Coolant
The engine coolant
recovery tank is in the
engine compartment on
the passenger’s side of
the vehicle. The cap has
this symbol on it. See
Engine Compartment
Overview on page 396
for more information on
location.
The vehicle must be on a level surface. When
your engine is cold, the coolant level should be at
FULL COLD, or a little higher.
416