20 Most Recent 2002 Chevrolet TrailBlazer Questions & Answers

On the 2002 Chevrolet Trailblazer with a 3.4L or a 4.3L the oil capacity is 4.5 quarts.

2002 Chevrolet... | Answered 3 days ago

You can get guide from many sites.. i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, com plete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

2002 Chevrolet... | Answered on Mar 19, 2019

P1484 - Cooling Fan System Performance

06-06-2005, 10:51 PMHere's what the GM Manual says about this code:

The cooling fan relay sends a pulse width modulation (PWM) signal of 12-14 volts to the cooling fan clutch through the cooling fan clutch supply voltage circuit. The powertrain control module (PCM) uses this PWM signal in order to control the speed of the cooling fan clutch. The signal controls the position of the oil control valve inside the cooling fan clutch. If the cooling fan RPM is different than the PCM is expecting, DTC P1484 will set. The actual cooling fan RPM vs the desired cooling fan RPM is not always exactly the same. There can be up to an 800-RPM difference.

The engine is running.
The system voltage is greater than 8.5 volts.
The intake air temperature (IAT) is greater than -7°C (19°F).
DTCs P1481 and P1482 are not set.
The engine speed is less than 3200 RPM.
The engine speed is not changing more than 250 RPM for 5 seconds.
Fan command is greater than 0%.

The maximum allowable error of 1000 RPM in the cooling fan speed occurs for 100 seconds.
The PCM detects that the cooling fan clutch is locked up.

The Reduced Engine Power indicator illuminates only if the PCM detects that the cooling fan clutch is locked up.
The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store the conditions as Freeze Frame/Failure Records data.
The PCM commands the cooling fan clutch to 100%.

Follow this procedure in order to clear DTC P1484 after completing a repair.

Use the Clear DTC Information function on the scan tool.
Perform an ignition key cycle.
The PCM turns OFF the MIL after the third consecutive trip that the diagnostic test has run and passed.

The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

An inline connector could cause an intermittent DTC. Ensure to test for poor connections and pin retention at all inline connectors. Refer to system schematics for connector and locations.
If the condition is not present, refer to Testing for Intermittent and Poor Connections in Wiring Systems.

Disconnect the harness connector of the cooling fan clutch from the shroud. Inspect the exposed wires between the harness connector and the tubing.
If DTCs P1484 and P0113 are set, and the weather conditions are cold, the cooling fan code may be false. Clear DTC P1484, and after an IAT sensor check, allow the DTC to reset .

I'd say that 'fan clutch is faulty' is your problem, based on the information you gave. Thank you for using Fixya and good luck

2002 Chevrolet... | Answered on Mar 14, 2019

Should be located under the shift console or right in that vicinity. Hope this helps you in locating your BCM, Jesus loves you, John 3:16-17 (KJV)

2002 Chevrolet... | Answered on Mar 11, 2019

The BCM is attached to the fuse block under the second row seat on the drivers side.

2002 Chevrolet... | Answered on Mar 09, 2019

If you are asking how to do this, it is not easy, it is very complex and takes a long time. The big points: Drain the coolant, disconnect battery, take off the intake manifold, take of the exhaust manifold, remove the head, clean the head and check for warp and cracks, clean the block and remove all debris from cylinders, install gasket, put head back on, put manifolds back on, replace coolant, change oil, connect the battery. You may have issues with bolts that break or strip out the block, you should send the head in to be checked, the valves and springs should be checked and those seals replaced, you need special tools and reference materials.

2002 Chevrolet... | Answered on Jan 24, 2019

Non-interference engine with a timing chain.

2002 Chevrolet... | Answered on Dec 21, 2018

Wiring, schematic, electrical diagrams, torq settings, parts info, error/fault codes, full assembly/dissembly, service instructions and a lot more etc are basic contents of these online books they here on this website https://big-manuals.com/

2002 Chevrolet... | Answered on Dec 01, 2018

you have to remove the dash assemblyits a big job,dont buy after market heater core or you be doing it again in year

2002 Chevrolet... | Answered on Oct 27, 2018

If that is the problem...put your allen wrench or socket on the bolt. Then put a CRECENT wrench on that end of your ratchet....you need leverage....trust me, it will break loose.

2002 Chevrolet... | Answered on Oct 23, 2018

Assuming you have a 4.2L engine here is the location.

Hope this helps out,
if so please rate my answers.

2002 Chevrolet... | Answered on Jun 27, 2018

Hi, first, keep this diagram around as you will need it to route the serpentine belt when you reinstall it. There may also be a diagram under the hood by the radiator.
7e98dff.jpg Next, follow this link and watch the video that shows you how to replace a serpentine belt...
Take care

2002 Chevrolet... | Answered on Jun 22, 2018

When the A/C clutch is not engaged is the space between the pulley and the clutch plate with in specs?

2002 Chevrolet... | Answered on Mar 29, 2018

You'll need a helper for this. Refill the reservoir.
**Keep the blazer in park with the E brake on.**
It might help if you raise the front end onto axle stands. Run the engine so the power steering is active. Get you helper to turn the steering from lock to lock, hard left to hard right and back again. Do this 2 or 3 times. While they do this have a look at all the pipe work you can see, WEAR SAFETY GOGGLES if your under the car. Working the steering will show where the system is leaking.

2002 Chevrolet... | Answered on Mar 01, 2018

If you have a clear view of that cylinder, look at that area in the dark to see if you can find any sign of sparking that would indicate a failure of the insulation on the wires or the coil.

2002 Chevrolet... | Answered on Feb 20, 2018

Follow the instructions on the attached url.


2002 Chevrolet... | Answered on Feb 12, 2018

dammed electronics ,bane of my life so your not the only one and in cases like this i can only suggest you bite the bullet and take vehicle to a main dealer .sorry i know this isnt the answer your looking for but from experiance certain things on modern motors you cannot do your self

2002 Chevrolet... | Answered on Feb 10, 2018

On these websites you find fuse box diagram, description and location for Chevroelt Trailblazer (2002)

ChevroletTrailblazer 2002 fuse box diagram

ChevroletTrailblazer 2002 fuse box diagram Auto Genius

2002 Chevrolet... | Answered on Jan 19, 2018

there will be a fuse box by foot pedals, or if its left hand drive it will be on passengers side. if not then check the engine bay

2002 Chevrolet... | Answered on Jan 19, 2018

Your brake light switch is ticking our out of adjustment is mounted in the IP support above the brake pedal arm. See picture below. Color may vary, it can be black or white

2002 Chevrolet... | Answered on Jan 19, 2018

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