# 4 wheel drive

**URL:** <https://community.cartalk.com/t/4-wheel-drive/61483>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, blazer\
**Created:** [February 17, 2011, 8:52pm UTC](https://community.cartalk.com/t/4-wheel-drive/61483 "2011-02-17T20:52:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![natalieG](https://avatars.discourse-cdn.com/v4/letter/n/eb8c5e/32.png) [@natalieG](https://community.cartalk.com/u/natalieG)\
**Post date:** [February 17, 2011, 8:52pm UTC](https://community.cartalk.com/t/4-wheel-drive/61483/1 "2011-02-17T20:52:52Z")

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my 2001 chevy blazer went into 4 wheel drive on it’s own and now will not come out

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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:** [February 17, 2011, 9:30pm UTC](https://community.cartalk.com/t/4-wheel-drive/61483/2 "2011-02-17T21:30:04Z")

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As a rule I’ve had more problems getting my 2000 Blazer into 4wd. This link has helped troubleshoot my Blazer 4wd.

> **['03 Chevy Blazer - where's my 4 wheel drive? (UPDATED) - kylestubbins.com](https://www.kylestubbins.com/03-chevy-blazer-wheres-my-4-wheel-drive-updated/)**
>
> Problems of corrosion on the TCCM wires on my 2003 Chevy Blazer 4 Wheel Drive.

One simple thing to try is to disconnect the battery to reset the Transfer Case Control Module (TCCM) or disconnect the wiring harness at the TCCM (inside right kick panel). An GM tech told me the TCCM will lock up if the Blazer is not shifted into 4wd on a regular basis.

Ed B.