Question about 2008 Chevrolet Suburban

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My service 4wd light comes on periodically. What causes this?

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  • Anonymous Jan 14, 2009

    I was driving on a snow covered road and it was in Auto 4WD. Normally the light on the pushbutton is on. It went out and a message came on the dash - SERVICE 4WD. T

  • Anonymous Jan 19, 2009

    every now and then my service 4wd comes on what do i do about this?

  • gamma123 Feb 01, 2009

    Service 4wd light came on message center while driving on snowy road. I changed the 4wd actuator. this got me out of 4wd. But the service 4wd light is still there and the indicator lights to show where my transfer case is at is still out. I can't switch to 4wd etc. the buttons aren't working. Where do I go from here?

  • Anonymous Feb 19, 2009

    03 taho.... 4wd service light comes on..  light come on for the 4 wd low.... pull fuse does not go in to gear,,,can it be the swicth ??????   ED



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Replace encoder motor.ancoder motor is left side of transefer case under the front must take out front drive shaft

Posted on Mar 12, 2009

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A number or things could cause this anyone of the sensors on the transfer case or a misadjusted shifter cable

Posted on Dec 22, 2008


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Posted on Jan 02, 2017

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SOURCE: 02 Suburban Service 4WD light on periodically. Humming

Sounds like CV joint, or wheel bearing

Posted on Mar 26, 2009

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SOURCE: service 4wd light is coming on but 4wd works fine

i had the same problem in my 99,i replaced the switch assembly on the dash and all is well,hope this helps

Posted on Sep 05, 2009

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Why is the service 4WD message on all the time and diff lock light flashes and dos not lock?

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My service 4wd light keeps coming on in my 2000 cadillac escalade what should i do and what should it cost me??

when the 4WD light comes on you more likely have problems in the 4WD low switch circuit.well this is a dealership fix.because your 4WD is pcm controlled.when 4WD light turn on pcm detected the transfer case ratio was 0.8 - 1.2 or during condition 2 with the 4WD low switch not in 4WD low, transfer case in 4WD low,tcc commanded on, tcc slip speed from 100 to 3000 rpm, the pcm detected the transfer case ratio was 2.5 - 2.9 all conditions met for 10 seconds.see dealership has to check.many things will cause your 4WD light to turn on.dealership has to hook up diagnostic equipment to find your problem and fix it.hate to tell you.they will charge $100.00 or more to trouble shoot.then charge for labor and new around and get a price will be good if your vechicle has a extended warranty.

Apr 17, 2011 | 2000 Cadillac Escalade

1 Answer

Noise in the transfer case

Hi. Hope I can help you, If you have the 4WD drive light on in the dash along with the noise, then there is a service bulletin that points to a bearing. See this copied from it:
"Some customers may comment on a grinding type noise in the transfer case when 4WD is engaged in either AUTO or 4WD mode. This noise may also be accompanied by the SERVICE 4WD lamp being illuminated and DTC C0327 set.
This condition is more prevalent on vehicles where 4WD is continuously used.
This noise may be caused by a faulty clutch pressure plate bearing."

This would mean time to go into the transfer case. If you want more detailed instructions on the situation, come to and fill out the contact form. I will be glad to help you.

Nov 30, 2010 | 2004 GMC Envoy

1 Answer

Trouble service 4wd light 2004 Suburan- resets when restart most of the time, wont shift to 4wd when lights are out on dash or and service light is on, conections look good.

I just had the switch replaced on the dash and that helped for a while. Now the service 4wd light comes on but i have no problems shifting into 4wd or no problems with the switch lighting up. cost about $150 to have this done. Still not convinced the problem is solved b/c the service light is still coming on.

Nov 27, 2010 | 2004 Chevrolet Suburban

1 Answer

Service 4wd light is coming on but 4wd works fine

i had the same problem in my 99,i replaced the switch assembly on the dash and all is well,hope this helps

Sep 01, 2009 | 1999 GMC Sierra

1 Answer

1999 chevy blazer 4wd not working. in 2wh hi.service 4wd light is on, on the dash. no lights on any of the dash buttons. any suggestions.

switch, 4x4 motor, 4x4 module can cause the lamp to come on need the code most parts stores will tell you code with out charging a dime

Apr 27, 2009 | 1999 Chevrolet Blazer

1 Answer

Service 4wd light

what causes the 4wd to kick in when you have it in 2wd

Mar 13, 2009 | 2004 GMC Yukon

2 Answers

Service 4wd light comes on and off.4wd works fine.

I had the same problem with mine. Also, my lights on my 4wd switch would all go out intermittently. I replaced the switch on the dashboard (~$80 at the dealership) and have not had the problem since. I would try this before replacing the encoder motor, since that costs somewhere in the neighborhood of $350.

Dec 09, 2008 | 1999 Chevrolet Silverado 1500

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