Question about 1992 GMC Jimmy

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4 wd stopped working

My 4 wd suddenly stopped working the transfer case kicks in but the front wheels don't spin. Help!

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I had the same problem several years ago. The steel cable on the vacuum actuator (located under the battery tray), was broken (internally) at the transfer case. I had to wait 2 weeks for a factory replacement. Dealers were not permitted to stock and had to supply the VIN no. of the vehicle before ordering. Apparently this was a very common problem. Another cause of the same problem was the electrical switch on the side of the transmission (hard to get to). The ball actuator sticks. Each part costs about $30.00. Hope this helps.
RAZANG

Posted on Aug 20, 2008

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Here's a trouble chart...straight from manual
please rate me FIXYA since I supplied the repair thought chain...
4 wd stopped working - af490ad.jpg

Posted on Jul 03, 2008

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