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

Sounds like CV joint, or wheel bearing

Posted on Mar 26, 2009

  • 285 Answers

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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your truck 4 wd system is having a problem -either a fuse went or your 4wd module is going bad causing the 4wd system to try to engage-can be a bad switch-also check fluid and the elect connections on transfer case and have a scan check [obd ll] possible to have a trouble code in memory most auto stores offer this service for free

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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 part.call around and get a price check.it will be good if your vechicle has a extended warranty.

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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.
Cause
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 www.onlinewrench.com and fill out the contact form. I will be glad to help you.

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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.

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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

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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.

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