Question about 1999 Chevrolet Silverado 1500

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I have a service 4x4 dash light. What does this

I have a service 4x4 dash light. What does this mean?

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Hello, this warning light is for a malfunction in the transfer case control module. this vehicle has a NP8 transfer case system. what you will have to do is to have the transfer case control module scanned for trouble codes. the control module stores trouble codes to help is finding the problem. in most cases on this vehicle, you will either have a code C0327 or a b2725 code stored. code C0327 is for a failed encoder motor or sensor. code B2725 is for a bad control switch

Posted on Jul 04, 2010

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It can mean several things one is the oil is low in the front or rear differental check this first. nrxt check that the switch is not stuck but check oil first. If it's low repalce the oil with 120 Wt gear oil if this does not fix it then get back to me so I can tell you how to remove the actuater bulb that operates the front end.

Posted on Jul 04, 2010

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SOURCE: service 4 wheel drive light

buy manual

Posted on Sep 12, 2009

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SOURCE: I have a 2002 Trailblazer the 4x4 switch on the dash don't light up any more which means the 4x4 don't work any help

I appreciate your request for my help. However, for either personal or technical reasons I am unable to assist you at this time.

Posted on Dec 11, 2011

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2 Answers

Light on dash with open wrench nd four wheels with front wheels turned


The light is a service needed reminder, consult the dealer or your owners manual for details

Jan 12, 2017 | Cars & Trucks

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No communication from computer to 4wheel drive changed push button on dash still no lights on


Some vehicles have a module for the 4x4 under the passenger side dash. Most likely it is the motor on the transfer case that is bad. Year, make, and model?

Jan 25, 2015 | Cars & Trucks

1 Answer

I have a 2002 Trailblazer the 4x4 switch on the dash don't light up any more which means the 4x4 don't work any help


I appreciate your request for my help. However, for either personal or technical reasons I am unable to assist you at this time.

Dec 05, 2011 | 2002 Chevrolet TrailBlazer

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I HAVE AN 09 RAV4 THAT IS A 4X4. THERE IS NO LEVER OR BUTTON TO PUSH TO ENGAGE THE 4 WHEEL DRIVE - ONLY A BUTTON TO LOCK THE DIFFENTRIAL. DOES THIS MEAN IT IS ALL WHEEL DRIVE, AND IF SO WHY IS THERE A 4X4...


probably the same button that locks the differential automatically locks the 4x4. if the 4x4 light is on your dash then the 4x4 should be working

Feb 19, 2010 | 2009 Toyota RAV4

1 Answer

Service 4x4


Found the same prob with a 2000 4x4.....Took the dash apart were the switch is,cleaned the contacts and it took care of it.. The 4 wheel drive worked fine just the light in the information box was a pain.....it was only a connection.....

Dec 18, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Why does a 1999 Suburban Auto Transfer case not engage and not go into 4X4 or auto 4X4 and push button lights on dash do not light when the fuse is good?


The 4x4 switch on the dash likes to take a dump in those years. They also like to eat encoder motors. If you have a way of checking it, try and get the codes out of the transfer case modual. b2725 means you need a new 4x4 switch on the dash. c0327 means you need a new encoder motor. There are a bunch of other codes that can be in there. But I'll take a guess and say those will be the ones you'll see.

Oh and for what it's worth the encoder motor is the the thing on the transfer case that shifts it. It's a electric motor. And it's NOT cheap! So make sure you find out if it's really bad before you put one in.

Oct 16, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Now and again while am driving the 4x4 service light on the dash keeps coming on.. i dont understand cause i just gave it a full tune up.. what can i do to solve this problem?


Hi
the SERVIVE 4X4 light coming on means there is a fault code
you will have to get the code and repair the problem then the light will stay off


May 10, 2009 | 1999 Chevrolet Blazer

2 Answers

4x4 service light came on how do i reset


the reason your service 4x4 light is on there is a code that will have to be diag. and repaired then it can be cleared with a scan tool

May 03, 2009 | 1999 Chevrolet Silverado 1500

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