Question about 1999 GMC Suburban

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1999 GMC suburban Stuck in 4x4HI

Hi my truck wont switch out of 4x4HI. When I try to go into any other the light flashes, and I hear an electrical ticking sound. But I dont feel the usual clunking sound like when I switch to 4lo. Killing my fuel economy
Help Please

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  • kiwikewl May 08, 2009

    I did have it in 4LO about a week earlier, and had to go up a steep dirt hill. then it switched back to 2HI noproblem. Then I switched it back to 4x4, and ever since then I cant get it to go into 2HI or 4LO.

  • kris vis
    kris vis May 11, 2010

    the electrical ticking is the solenoid doing or trying to do its job... did you go off road?



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With truck rolling appx 10 mph,put trans in nuetral and while rolling try changing to different selection on gear selection then place trans back in drive..

Posted on May 08, 2009


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