Question about GMC Yukon XL

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4x4 will not shut off - Yukon XL GMC Cars & Trucks

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  • greenfox94 Mar 17, 2009

    I have the same truck, same year, and my four wheel drive is also stuck on. I changed the dash switch, and the transfer case vacuum switch. I ordered a transfer case motor thinking that it was the only thing left, but now i'm finding that there's a 4WD actuator vacuum part on these also. I'm still searching, so i'll let you know when i figure it out....



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This can be either in your ignition switc the electrical part under the steering column or a shorted field circuit in your alternator, very carefully see if you can unplug the wires going to the alternator and then disconnect the battery and you will be able to turn off the engine however use extreem caution while you work under the hood especially while the engine is running!!!!!!

Posted on Nov 24, 2008

  • Ken Oct 02, 2010

    I think roby thinks the truck won't shut off but poster means It is stuck in 4wd. I'm having the same problem. Can't drive it to my mechanic because it it 15 miles of paved roads.



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