Question about 2003 Chevrolet Tahoe

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My dash says service 4WD, what kind of service? can I do it?

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This means the the 4wd has detected a problem in its circuit. There should be a code stored to pinpoint the problem. it could be a switch or the encoder motor sensor. Really need to get the code for the proper repair.

Posted on Sep 13, 2010

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Service 4wd warning light on Dash? http://howtobyme.blogspot.com/2011/11/service-4wd-warning-light-on-dash.html
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1 Answer

The service 4wd light is on it came on while in auto 4wd


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There will be a diagnostic trouble code stored
Most likely scenario...the module is bad (thats the switch on the dash) but have it diagnosed before throwing a part at it

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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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1 Answer

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


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