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Hello I need your guys help I am new here. But love my 98 Chevys I'm on my third one.. the one I currently have is a 98 GMC Sierra extended cab four wheel drive K 1500 with push button 4 wheel drive. It's done this three times over the last week it will put itself into 4hi while driving down the road at 50 miles an hour (or any speed) i will hear a clunk and look over and the four high light will be lit up. Press the 2hi button goes back to 2wd for aday or so till it does it again Do you think it could be the selector switch or somthing else? Thank you
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