push button 4x4 doesn't work

Discussion in 'General Chevy & GM Tech Questions' started by superUPer, Dec 1, 2010.

  1. superUPer

    superUPer New Member

    2001 chevy 1500HD
    4x4 worked fined when I bought it, now it doesn't work. I press the 4hi button, it blinks a few times and then stays solid, just like normal. Same with 4lo, but when I press that there is a whirring noise. Still doesn't engage. If I press 4auto, after a while the service 4x4 light comes on. Is this an acuator problem? How can I tell?
  2. dsfloyd

    dsfloyd Epic Member 5+ Years ROTM Winner 1000 Posts

    gonna need to have it looked at by someone with a tech II so it will show where the problem is. its one of those things the basic scanner wont show. I had to have the actuator replaced on mine. I try to stay away from the stealership as much as possible but sometimes its necessary.

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