Question about 1999 GMC Jimmy

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No 4x4 when i push the switch on my 97 blazer

When i engage the 4x4 switch, it lights up, but it isn,t really in 4x4. i can hear the transfer case shift motor engaging and the vaccuum parts under the hood stay sucked in all the time, i know its only suppose to be sucked in when its in 4x4. can it still be the transfer case motor?

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  • Anonymous Mar 11, 2009

    I had the same problem, which I fixed by replacing the vacuum switch on top of the transfer case, however I found out after that the bad switch created a bigger problem in that it tried to engage the front axle at speed and stripped the slider that ties the axles together. Result is still no 4x4 just grinding noise when wheels start to spin. Pray this did not happen to you. Good Luck !!!



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I have had this problem before but all I had to do was disconnect the negative battery cable for about 5 minutes and it fixed itself, maybe just a coincidence but it is fixed now.

Posted on Mar 15, 2009


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