# 2016 Chevrolet Tahoe - Drivetrain locked into Auto

**URL:** <https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet\
**Created:** [December 23, 2019, 5:24pm UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225 "2019-12-23T17:24:20Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![MikeJochum](https://avatars.discourse-cdn.com/v4/letter/m/a183cd/32.png) [@MikeJochum](https://community.cartalk.com/u/MikeJochum)\
**Post date:** [December 23, 2019, 5:24pm UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225/1 "2019-12-23T17:24:20Z")

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Unit is locked into “auto” mode, will not return to 2wd. Have checked the fuse and OK. Any ideas ?

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**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\
**Post date:** [December 23, 2019, 8:45pm UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225/2 "2019-12-23T20:45:37Z")

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When the 4wd system would act up on my old 2000 Blazer, I would either disconnect the battery negative cable or disconnect the wiring harness from the TCCM (Transfer Case Control Module) for a few minutes to reset the system.

Good luck ( and I mean it),

Ed B.

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [December 23, 2019, 9:02pm UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225/3 "2019-12-23T21:02:19Z")

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i think my kids GMC Sierra was in auto mode all the time? not sure if he could even turn it off? whats wrong with auto? isnt auto good?

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**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\
**Post date:** [December 23, 2019, 9:29pm UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225/4 "2019-12-23T21:29:18Z")

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In my case it will rob you of a few miles per gallon, Do you live in a salty road climate? In earlier years it was a bad electrical connection on the transmission, not sure if it applies to your car, but one can hope.

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [December 23, 2019, 10:23pm UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225/5 "2019-12-23T22:23:34Z")

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So, switch says, 2wd, auto, 4wd? Where is the hi/lo switch?

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**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\
**Post date:** [December 24, 2019, 12:38am UTC](https://community.cartalk.com/t/2016-chevrolet-tahoe-drivetrain-locked-into-auto/155225/6 "2019-12-24T00:38:00Z")

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> [@Cavell](#):
>
> So, switch says, 2wd, auto, 4wd? Where is the hi/lo switch?

It’s a 4 position rotating knob 2hi, auto, 4hi, 4lo