Question about 1999 GMC Suburban

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Check 4 wheel drive light appears after 4x4 is engaged.

I have a 1999 Suburban 2500 SLT 4x4 w/ a 7.4L. I had the transfer case replaced in 2005 because the oil was drained from it and never replaced and subsequently burnt out. I recently have been experiencing a problem with the automatic 4x4 buttons. The light does not stay constently illuminated when in 2WD, sometimes it is on sometimes it's not. When ?I went off-road and engaged my 4WD high button the light went on then I noticed a little bit later it was off. The check 4WD drive light had come on after about 5 or 10 minutes in 4WD. What would cause this light to appear and how can I fix this problem.
Ed from Phoenix

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  • poohba71 Feb 13, 2009

    we are having the some thing. we just bought the truck and are getting use to some of the gears. it did not come with a information book for the tuck. we bought one from the car store. but it doesnot tell us how to check it. i want to know how to get it fix before it does something ealse to the truck thank u

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Transfer case make grinding in shake when in 4 wheel

Posted on Jan 24, 2009

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The sensors inside the t-case show that no lubricant is present and just needs a cycle of use to read correctly, or a new tranfer case switch $60 and 30min.

Posted on Dec 16, 2008

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Check the oil in the transfer case. If it has lots of metal in it... time for a new one. They aren't the world's strongest.
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