2009 CHEVROLET TRAIL BLAZER heater

If No Steam Is Coming From The
Engine Compartment
If an engine overheat warning is displayed but no
steam can be seen or heard, the problem may not be
too serious. Sometimes the engine can get a little too
hot when the vehicle:
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
Tows a trailer.
If the overheat warning is displayed with no sign of
steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and
to the highest fan speed. Open the windows as
necessary.
3. In heavy traffic, let the engine idle in N (Neutral)
while stopped. If it is safe to do so, pull off the
road, shift to P (Park) or N (Neutral) and let
the engine idle.
If the temperature overheat gage is no longer in the
overheat zone or an overheat warning no longer
displays, the vehicle can be driven. Continue to drive
the vehicle slow for about 10 minutes. Keep a safevehicle distance from the car in front of you. If the
warning does not come back on, continue to drive
normally.
If the warning continues, pull over, stop, and park the
vehicle right away.
If there is no sign of steam, idle the engine for three
minutes while parked. If the warning is still displayed,
turn off the engine until it cools down.
Engine Fan Noise
The 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 the engine is
started. The sound will go away as the fan clutch
disengages.
5-36

E
EDR .............................................................7-17
Electrical System
Add-On Equipment.....................................5-118
Engine Compartment Fuse Block.................5-119
Fuses and Circuit Breakers.........................5-119
Headlamps...............................................5-118
Power Windows and Other Power Options....5-118
Rear Underseat Fuse Block.........................5-122
Windshield Wiper Fuses.............................5-118
Electronic Immobilizer
PASS-Key
®III+...........................................2-19
Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-19
Electronically Controlled Air Suspension System . . . 4-47
Engine
Air Cleaner/Filter.........................................5-24
Change Engine Oil Light...............................3-43
Check and Service Engine Soon Lamp...........3-39
Coolant......................................................5-29
Coolant Heater............................................2-25
Coolant Temperature Gage...........................3-38
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-38
Fan Noise..................................................5-36
Oil .............................................................5-18
Oil Life System...........................................5-22Engine (cont.)
Overheating................................................5-35
Reduced Power Light...................................3-44
Starting......................................................2-23
Entry Lighting.................................................3-17
Event Data Recorders.....................................7-18
Exit Lighting...................................................3-17
Extender, Safety Belt.......................................1-32
F
Filter
Engine Air Cleaner......................................5-24
Finish Damage.............................................5-116
Fixed Mast Antenna.......................................3-111
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-82
Flat Tire, Changing.........................................5-93
Flat Tire, Storing...........................................5-106
Fluid
Automatic Transmission................................5-25
Power Steering...........................................5-37
Windshield Washer......................................5-38
Fog Lamp
Fog ...........................................................3-16
Four-Wheel Drive....................................2-30, 5-50
Front Axle......................................................5-51
5

Fuel............................................................... 5-5
Additives...................................................... 5-7
California Fuel.............................................. 5-6
Check Gas Cap Light...................................3-47
Driving for Better Economy............................. 4-2
Filling a Portable Fuel Container....................5-10
Filling the Tank............................................. 5-8
Fuels in Foreign Countries.............................. 5-7
Gage .........................................................3-46
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Low Warning Light.......................................3-47
Fuses
Engine Compartment Fuse Block.................5-119
Fuses and Circuit Breakers.........................5-119
Rear Underseat Fuse Block.........................5-122
Windshield Wiper.......................................5-118
G
Gage
Check Gages Warning Light..........................3-45
Engine Coolant Temperature.........................3-38
Fuel..........................................................3-46
Oil Pressure...............................................3-42
Speedometer..............................................3-30
Tachometer.................................................3-30
Voltmeter Gage...........................................3-35
Garage Door Opener.......................................2-48Gasoline
Octane........................................................ 5-6
Specications............................................... 5-6
Gate Ajar Light...............................................3-46
Glove Box.....................................................2-53
GM Mobility Reimbursement Program.................. 7-7
H
Hazard Warning Flashers................................... 3-6
Head Restraints..............................................1-10
Headlamp
Aiming .......................................................5-52
Headlamps....................................................3-13
Bulb Replacement.......................................5-52
Daytime Running Lamp................................3-14
Electrical System.......................................5-118
Flash-to-Pass............................................... 3-8
Halogen Bulbs............................................5-52
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-14
Heated Seats................................................... 1-4
Heater...........................................................3-20
Engine Coolant...........................................2-25
Heater...........................................................3-22
Highbeam On Light.........................................3-45
High-Speed Operation, Tires.............................5-66
Highway Hypnosis...........................................4-28
Hill and Mountain Roads..................................4-29
6