# GMC Sierra Z71 4 X 4

**URL:** <https://community.cartalk.com/t/gmc-sierra-z71-4-x-4/22271>\
**Category:** Maintenance/Repairs\
**Created:** [November 19, 2008, 3:33pm UTC](https://community.cartalk.com/t/gmc-sierra-z71-4-x-4/22271 "2008-11-19T15:33:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Elizabeth\_Letchworth](https://avatars.discourse-cdn.com/v4/letter/e/bc8723/32.png) [@Elizabeth\_Letchworth](https://community.cartalk.com/u/Elizabeth_Letchworth)\
**Post date:** [November 19, 2008, 3:33pm UTC](https://community.cartalk.com/t/gmc-sierra-z71-4-x-4/22271/1 "2008-11-19T15:33:39Z")

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I drive a seirra truck with 117,000 miles & at times it will lock itself in 4 wheel low when I first start the vehicle. I have to shift into neutral and press 2 wheel high to get it back to normal. Dealer couldn’t recreate the situation thus said they could not solve the problem. Any ideas?

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**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\
**Post date:** [November 19, 2008, 4:32pm UTC](https://community.cartalk.com/t/gmc-sierra-z71-4-x-4/22271/2 "2008-11-19T16:32:42Z")

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Do you use 4wd very much? I would start by unplugging the 4wd selector switch and see if that solves it. If it does, I think that you can blame the switch. If not, we have to dig deeper.

What year was this truck made?

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**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\
**Post date:** [November 20, 2008, 5:25am UTC](https://community.cartalk.com/t/gmc-sierra-z71-4-x-4/22271/3 "2008-11-20T05:25:41Z")

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If you have the dash mounted 4x4 push buttons, pull the switches out (I believe they pop out together) and check for loose wiring connections.

I read a post where one fellow said to do this and he said he re-soldered the connection.

You can read quite a few references to this problem on [http://www.chevytalk.org/fusionbb](http://www.chevytalk.org/fusionbb)

This site covers all years and models GM.