Question about 1999 Chevrolet Silverado 1500

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Push button 4wd wont engage in 4wd

Every time i try to put in 4wd it just like it tries but dont work. lights come on but then go off when try to put in 4wd.then the message box sys service 4wd.

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The solder joints broke on the push button's PC board at the connector. Pop out the button assembly , disconnect from wire harness and re-solder the connector pins to the PC board. Very easy to fix!

Posted on Jun 11, 2009

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There is a small sensor on the top of the transfer case that has three vacume lines into it. that little switch has a bearing that the vacume sucks up to operate the 4 wheel drive. replace as well as check the vacume lines to make sure you dont have a hole or leak in them

Posted on Dec 13, 2008

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