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Thread: Service 4wd

  1. #21

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    Scott2170,

    I see that you are are new member, welcome! I understand that you are seeking advice from your fellow forum members. I might not be able to give you any technical advice but I would like to look into this concern for you. Please private message me if I can be of any assistance.

    Jennifer T.
    GM Customer Care

  2. #22

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    Ok folks, I have one more question. I know I can go from 2wd to auto 4wd while moving down the road. Can I do the same thing with 4hi? Obviously 4lo is a big happen not gonna while moving.
    Chuckie!!!


  3. #23
    Legend

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    you can go into 4wd and 2wd when driving with High gear selection. you must not go into 4wd LOW when moving more than at a crawl speed..

  4. #24

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    Quote Originally Posted by j cat View Post
    you can go into 4wd and 2wd when driving with High gear selection. you must not go into 4wd LOW when moving more than at a crawl speed..
    lol I figured as much with the 4lo. That would make for a VERY bad day lol thanks for your input

  5. #25
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    4wd low is for pulling a boat out a steep ramp or pulling a stuck vehicle out from the ditch/snow bank...

    no reason to engage at a any speed. the manual does state that with the vehicle creeping along the 4wd low will engage possibly a little easier. also turning the wheels sharply in this position on solid dry pavement is not a good idea...

  6. #26

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    ok i checked all fuses and none were blown. any ideas?

  7. #27
    Legend

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    I would check the transfercase fluid for level and condition. should be blue color. with the fuses good checked with meter then go to have the drivetrain codes pulled with a GM code tool. post the codes here .

    if the encoder motor is stuck or reporting a improper position it will not go into 4wd.. also could be fuses/wires /connectors broken damaged

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