Question about 2000 Chevrolet Tahoe

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Service 4wheel drive light on (dashboard)can I change out the fluid? after driving just a couploe of miles the service light comes on.Took a sample of transfer case fluid and can't quite tell what type of fluid to use.

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The service 4 wheel drive light is indicating a part failure in the 4 wheel drive system.
Take your vehicle to your local Auto Zone or Advance Auto Parts and ask them to scan your Tahoe for trouble codes. The code will help to determine what the component failure is and you can start diagnosing at that point.
Write the code down and reply back, we can go from there.
Good luck.
Regards,

Posted on Sep 08, 2009

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Posted on Jan 02, 2017

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I have a 2005 Tahoe that recently had a similar problem. To resolve, I did the following.
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  2. Change Gears to 4L while in neutral, change back to drive, and drive slowly 50 yards or so.
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This will cycle the fluid within your transfer case, and hopefully clean out the sensor. I did this, and my Service 4WD light went away after one day of normal driving. Hope this helps. Note: When I went into 4L the first go around, it had a hard time shifting due to non use. I changed between 4H and 4L a few times until it got smoother.

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