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Re: 99 Yukon - 4wd won't work, blown fuse
the actuator is heat activated so the short could be in the internals of the actuator. have you replaced it to see if that helps? if you have a buddy with a 96 and up yukon, tahoe, or a half ton z71, just pull theirs out and put it in yours to see if that fixes your problem. good luck
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