2008 CHEVROLET TRAIL BLAZER radiator cap

If the overheat warning continues, there is one more thing
you can try. You can add the proper coolant mixture
directly to the radiator, but be sure the cooling system is
cool before you do it.
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap — even a little — they can come
out at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have
to turn the pressure cap.
How to Add Coolant to the Radiator
1. You can remove the radiator pressure cap when the
cooling system, including the radiator 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.
2. Then keep turning the pressure cap. Remove the
pressure cap.
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3. Fill the radiator with the proper DEX-COOL®coolant
mixture, up to the base of the ller neck. SeeEngine
Coolant on page 5-28for more information about the
proper coolant mixture.4. Then ll the coolant recovery tank to the FULL
COLD mark.
5. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap off.
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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.
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Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(40 000)50,000
(80 000)75,000
(120 000)100,000
(160 000)125,000
(200 000)150,000
(240 000)
V8 engine only: Inspect spark plug
wires.An Emission Control Service.•
Engine cooling system service
(or every ve years, whichever occurs
rst).An Emission Control Service.
See footnote (i).•
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (l).•
Maintenance Footnotes
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chafing, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chafing, etc.(c)Visually inspect hoses and have them replaced if
they are cracked, swollen, or deteriorated. Inspect all
pipes, fittings and clamps; replace with genuine parts as
needed. To help ensure proper operation, a pressure
test of the cooling system and pressure cap and
cleaning the outside of the radiator and air conditioning
condenser is recommended at least once a year.
(d)Inspect wiper blades for wear, cracking, or
contamination. Clean the windshield and wiper blades,
if contaminated. Replace wiper blades that are worn
or damaged. See Windshield Wiper Blade Replacement
on page 5-55 and Windshield, Backglass, and Wiper
Blades on page 5-105 for more information.
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(e)Make sure the safety belt reminder light and safety
belt assemblies 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 see Checking
the Restraint Systems on page 1-66.
(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, chafing, leaks, kinks,
and proper installation.(h)Change automatic transmission fluid and filter 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, flush, and refill cooling system. This service
can be complex; you should have your dealer/retailer
perform this service. See Engine Coolant on page 5-28
for what to use. Inspect hoses. Clean radiator,
condenser, pressure cap, and filler neck. Pressure test
the cooling system and pressure cap.
(j)A fluid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the fluid level checked. Add fluid if needed.
(k)If you drive regularly under dusty conditions, inspect
the filter at each engine oil change.
(l)Visually inspect belt for fraying, excessive cracks, or
obvious damage. Replace belt if necessary.
6-8

R
Radiator Pressure Cap....................................5-30
Radio Frequency Identication (RFID), Privacy....7-18
Radio(s)........................................................3-66
Radios
Navigation/Radio System, see
Navigation Manual....................................3-89
Rear Seat Audio........................................3-103
Reception.................................................3-106
Setting the Clock.........................................3-66
Theft-Deterrent..........................................3-104
Reading Lamps..............................................3-18
Rear Axle......................................................5-49
Locking........................................................ 4-5
Rear Climate Control System............................3-28
Rear Door Security Locks................................2-10
Rear Floor Storage Lid....................................2-57
Rear Seat Audio (RSA)..................................3-103
Rear Seat Entertainment System.......................3-89
Rear Seat Operation.......................................1-10
Rear Windshield Washer/Wiper.........................3-10
Rearview Mirror, Automatic Dimming with
Compass and Temperature Display................2-42
Rearview Mirror, Automatic Dimming with
OnStar
®and Compass.................................2-38
Rearview Mirror, Automatic Dimming with
OnStar
®, Compass and Temperature Display.....2-40Rearview Mirror with OnStar
®...........................2-38
Rearview Mirrors.............................................2-37
Reclining Seatbacks.......................................... 1-6
Recommended Fluids and Lubricants.................6-12
Recovery Hooks.............................................4-34
Recreational Vehicle Towing.............................4-42
Reduced Engine Power Light............................3-46
Remote Keyless Entry (RKE) System.................. 2-4
Remote Keyless Entry (RKE) System, Operation..... 2-5
Removing the Flat Tire and Installing
the Spare Tire.............................................5-89
Removing the Spare Tire and Tools...................5-86
Replacement Bulbs.........................................5-54
Replacement Parts, Maintenance......................6-15
Reporting Safety Defects
Canadian Government..................................7-15
General Motors...........................................7-15
United States Government............................7-14
Restraint System Check
Checking the Restraint Systems....................1-66
Replacing Restraint System Parts
After a Crash..........................................1-67
Retained Accessory Power (RAP)......................2-21
Roadside
Assistance Program....................................... 7-7
Rocking Your Vehicle to Get it Out....................4-34
Routing, Engine Drive Belt...............................6-16
Running Out of Fuel........................................2-36
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