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4x4 not working

Discussion in 'Chevy Trucks' started by Gmgbo, Jul 10, 2006.

  1. Gmgbo

    Gmgbo Senior Member
    Messages: 159

    I have a 1989 GMC 2500 with the 350. The other day I found out the 4wd doesnt work. Is there a common problem with the 4wd in these trucks? Thanks, Gary
  2. DeereFarmer

    DeereFarmer PlowSite Veteran
    Messages: 3,296

    Have you checked the transfer case for the 4wd? Does 4 lo or 4 hi work? Will it go into neutral. The transfer case should be the first place to look.
  3. flykelley

    flykelley 2000 Club Member
    Messages: 2,127

    Is it push button 4x4 or a manual shifter on the floor. the button seem to be a source of alot of the 4x4 problems.

    Good Luck Mike
  4. lorentzlawnsnow

    lorentzlawnsnow Senior Member
    Messages: 143

    the actuator on the front diff is a frequent trouble spot on these. i would check it out and if it is toast i would recommend the manual actuator available from 4x4 posi-lok.