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1998 GMC Jimmy 4wd

Discussion in 'GM Powertrain' started by alvin, Jun 10, 2013.

  1. alvin

    alvin New Member

    I have push button (electric) activation on the 4wd. Works in 2wd (light on), will not shift to 4wd high (but light comes on), or 4wd low (light also comes on). The vacuum hose and diaphragm have been replaced earlier and it worked fine for a while.

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