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2002 GMC 1500 4WD axle actuator mounting surface corroded

Discussion in 'Chevy Trucks' started by theholycow, Nov 26, 2014.

  1. theholycow

    theholycow PlowSite.com Addict
    Messages: 1,180

    2002 GMC Sierra K1500 with Autotrac 4WD

    4WD is not engaging. Transfer case is working fine; when I choose 4LO I get low range, but only the rear wheels.

    The actuator on the front differential isn't on straight, because a bunch of corrosion built up and pushed it sideways a little. I think that's my problem. I suppose it could be a broken or corroded wire going to the actuator, but it's in wire loom all the way to the main harness and this looks like a problem.

    I chipped out as much of the corrosion as I could with a screwdriver and hammer and soaked it in PB Blaster, but I couldn't get it to straighten out. The whole thing has a plastic housing so I don't think I can just put a big channel lock on it, squeeze hard, and turn it to release it so I can clean up the rest of the corrosion.

    Any suggestions?

    (Sorry for the photo quality, it's raining and dark...