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How to reset 4WD service light,2002 trailblazer

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: service 4WD LIGHT IS ON

It is in the owners manual, do you have one?

Posted on Oct 17, 2008

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solasknows
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SOURCE: 2002 trailblazer 4wd abs light and parking brake

you have to check the braking system, some sensor might be bad

Posted on Jul 23, 2009

emissionwiz
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SOURCE: reset 2003 trailblazer service engine light

is this the check engine yellow light?

Posted on Sep 28, 2009

  • 6 Answers

SOURCE: 03 Trailblazer service 4 wheel light activates while turning

check the lubricant in the transaxle, if it is low it will cause the light to come on.

Posted on Oct 24, 2009

  • 1 Answer

SOURCE: service 4wd light is on

I had to take mine into the dealer, There was a computer update and had to replace some motor, charged me for the update, which I think is wrong. :(

Posted on Nov 04, 2009

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1 Answer

Four wheel drive not working on 2002 chevy blazer


Is the SERVICE 4WD indicator lit ?
The SERVICE 4WD indicator is an integral part of the cluster and cannot be serviced separately. This lamp is used to inform the driver of the vehicle that a transfer case system malfunction. The SERVICE 4WD indicator is controlled by the transfer case shift control module via Class 2.
If so suggest you take it to a ASE certified repair shop !

Dec 15, 2015 | 2002 Chevrolet TrailBlazer

1 Answer

I have an 02 chevy trailblazer gear shifter will move but car won't move in reverse or drive now service 4 wheel drive light is on and the switch nuetral is lighting up but its on 2 wheel drive


May be broken 4WD actuator (quite common) which has stuck between engaged and disengaged. Remove and inspect actuator, but first examine all linkage for damage or having come loose.

Dec 19, 2014 | 2002 Chevrolet TrailBlazer

1 Answer

Service 4wd light on; w4d does not work at all


To start with, a basic engine computer code reader will not connect to the body computer which is why they are not getting any codes.
The 4wd lights will not come on as long as the warning light is on, the system is disabled until it is fixed.
You may need someone with a professional scanner to connect to the body computer.

Jul 04, 2013 | 2002 Chevrolet TrailBlazer

1 Answer

Chevy trailblazer 4wd is not engaging 4hi blinking and service 4wd light is on


There are two actuators that activate the 4WD components, one is for the Transfer case modes and the other is for the front axle disconnect. Both of these actuators make a distinctive noise (motor noise) when activated. First thing to do is with engine off and ignition on, switch from 2HI to 4HI and listen for two distinctive noises. If you hear both, more than likely the front spline disconnect assembly (at the front axle) is defective.
In order to troubleshoot the 4WD system, you need to have an understanding of the whole thing, it is not a DIY item.

Feb 21, 2013 | 2002 Chevrolet TrailBlazer

1 Answer

Service four wheel drive light on,cant shift into 4wd cold only ,below 45F,drive awahile resatrt the truck it works fine,warm days no problems .


Vehicles: 2002 Chevrolet Trailblazer 4WD 4.2L SFI DOHC 6-cylinder

Your front 4WD Transfer case is low on Gear Oil.
On warm days, the Gear Oil expands slightly, and is less viscous, so the "Service 4WD" light stays off. On colder days/mornings the story changes.

The following paragraph has info applying to the manual differential only:
The 2002 Trailblazer (the first year Chevy made the Trailblazer) has a Front Differential using 1.11 (that's 1 and 1/9th) Quarts Gear Oil, and a Rear Differential with a capacity of 2.29 (thats 2 and 2/7ths) Quarts Gear Oil.
The Gear Oil needed is GM Part No.12345349 or GM Part No.1052931 (they're identical), also known as "GM Synchromesh"(R), which is a type of GLS (Gear Lubricant, Special), also known as "Manual Synchromesh Transmission Fluid 5W30". A synthetic version of which sells for $12.70/qt (USD) at
http://www.amsoil.com/storefront/mtf.aspx

This is not to be confused with 5W30 motor oil (which can be had for $3.00/qt (USD)).

The 2002 Trailblazer 4WD Transfer Case (NV126 Transfer Case) capacity is 0.8 Liters of GM Part No.12378508 (US), also known as "GM Auto Trak II"(R).
Note that one Quart (US) = 0.946 Liter, so 0.8 Liter = 27.06 ounces.

Red Line sells something that they say replaces both GM Synchromesh and GM Auto-Trak II for $12.14/Qt and $44.55/Gal (US) at
http://www.shopwiki.com/Red-Line-MTL-70W80-GL~4-Gear-Oil-%281-Quart%29

13 Manufacturer Recalls apply to the 2002 Chevrolet Trailblazer (model year 2002 was the first year Chevy offered the Trailblazer), and two recalls pertain to the 4WD Transfer Case. Note that one of the recalls applies to only 895 units, so your vehicle is unlikely to be affected by this Transfer Case recall.

2002 Trailblazer Recall ==========================
OCT 17, 2001 ' Recall ID# 54221

Recall Reason POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
Recall Date OCT 17, 2001
Model Affected TRAILBLAZER
Potential Units Affected 78004

Recall Summary
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES EQUIPPED WITH 4-WHEEL DRIVE. THE CALIBRATION OF THE TRANSFER CASE CONTROL MODULE COULD CAUSE INSUFFICIENT HIGH SPEED GEAR ENGAGEMENT.

Consequence
IF THE GEAR IS NOT ENGAGED, THE VEHICLE CAN ROLL WHEN THE TRANSMISSION IS IN "PARK" AND A CRASH COULD RESULT WITHOUT WARNING.

Remedy
DEALERS WILL UPDATE THE TRANSFER CASE CONTROL MODULE CALIBRATION TO INCREASE GEAR ENGAGEMENT. OWNER NOTIFICATION BEGAN NOVEMBER 6, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.

Notes
GENERAL MOTORS CORP. 01064/01065

2002 Trailblazer Recall ============================
SEP 05, 2001 ' Recall ID# 26006

Recall Reason POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
Recall Date SEP 05, 2001
Model Affected TRAILBLAZER
Potential Units Affected 895

Recall Summary
VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES (4 WHEEL-DRIVE). SOME OF THESE VEHICLES WERE BUILT WITH A RANGE SHIFT COLLAR IN THE TRANSMISSION TRANSFER CASE THAT CONTAINS CRACKS.

Consequence
THIS CONDITION COULD RESULT IN A COMPLETE FRACTURE OF THE RANGE SHIFT COLLAR AND SUBSEQUENT LOSS OF VEHICLE FORWARD AND REVERSE GEARS, AND THE INABILITY TO MAINTAIN "PARK" POSITION. THIS INCREASES THE RISK OF A VEHICLE CRASH RESULTING FROM UNINTENDED MOVEMENT OF A PARKED VEHICLE.

Remedy
DEALERS WILL REPLACE THE TRANSFER CASES AND UPDATE THE CONTROL MODULE CALIBRATION. OWNER NOTIFICATION BEGAN SEPTEMBER 6, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.

Notes
GENERAL MOTORS CORP. 01061


Read about all (13) 2002 Chevy Trailblazer recalls at:
http://www.internetautoguide.com/10-12-2002-16-1287/2002-chevrolet-trailblazer-recalls.html

Dec 05, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

How to reset 4wd light for trailblazer 2003


You need to have a high funtion scanner to do this, But there's a problem with the 4wd. system that's causing the light to come on. The same scanner will be able to read the codes.

Jan 14, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

4wd service light is on and my 4wd is not working


probably the vaccum solinoid mounted behind engine on firewall. disconect the two hoses and splice them together. if the 4wd starts working replace the solnoid. if this dose not work try the switch on transmission

Mar 05, 2010 | 2002 Chevrolet TrailBlazer

3 Answers

4wd switch does not activite when turn on what can


try riving up motor after flipping switch or make sure your moving maybe a vacuum leak

Oct 28, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

After jump start to battery, service 4wd light stayed on. replaced battery wevice 4wd still on.


With scan tool reset the ecu, if light still on check for 4wd opertation if its ok, take the car to a specialize technitian for diagniostics.

Jul 10, 2009 | 2002 Chevrolet TrailBlazer

4 Answers

Service 4WD LIGHT IS ON


I have a 2002 chevy trailblazer LT 4.2 l w/ approx 85000 miles on it and I left key in car after rolling down windows for about 2 hours drainging battery. After charging battery and running car for a little bit the service 4 wheel drive light came on. I have had no problems with the truck and I am wondering if it is because the battery was drained and the computer needs to be reset or something?

Oct 17, 2008 | 1999 Chevrolet Silverado 1500

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