# Four wheel drive

**URL:** <https://community.cartalk.com/t/four-wheel-drive/40757>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, trailblazer\
**Created:** [December 14, 2009, 5:05pm UTC](https://community.cartalk.com/t/four-wheel-drive/40757 "2009-12-14T17:05:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Airborne](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Airborne](https://community.cartalk.com/u/Airborne)\
**Post date:** [December 14, 2009, 5:05pm UTC](https://community.cartalk.com/t/four-wheel-drive/40757/1 "2009-12-14T17:05:03Z")

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2002 Trailblazer the four wheel drive stopped working. Any ideas?

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**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\
**Post date:** [December 14, 2009, 5:19pm UTC](https://community.cartalk.com/t/four-wheel-drive/40757/2 "2009-12-14T17:19:24Z")

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Push-button 4WD systems use electrical servo’s to engage and disengage the transfer case and sometimes the axles too. After checking the fuses, you crawl underneath and check the wiring connectors on the transfer case. Then you make an appointment with a trusted, skilled, mechanic…