# Tahoe powering off!

**URL:** <https://community.cartalk.com/t/tahoe-powering-off/40773>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, tahoe\
**Created:** [December 14, 2009, 10:50pm UTC](https://community.cartalk.com/t/tahoe-powering-off/40773 "2009-12-14T22:50:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![McCarthyWY](https://avatars.discourse-cdn.com/v4/letter/m/c6cbf5/32.png) [@McCarthyWY](https://community.cartalk.com/u/McCarthyWY)\
**Post date:** [December 14, 2009, 10:50pm UTC](https://community.cartalk.com/t/tahoe-powering-off/40773/1 "2009-12-14T22:50:29Z")

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I have a 2000 Chevy Tahoe and it keeps powering off while I am driving it. It only happens for a split second and all the electrical goes crazy in the car. I also have noticed that the voltage goes way down. I do not have to restart it, it only switches off than back on right away. No one can seem to help me. I would appreciate any advice.

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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:** [December 15, 2009, 8:48pm UTC](https://community.cartalk.com/t/tahoe-powering-off/40773/2 "2009-12-15T20:48:45Z")

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Check out the alternator with the engine running and use a tester to check output at different rpms.

The brushes may be worn out.

Also, make sure the wiring is good and connections clean and tight.

Ensure a clean solid ground to engine as well.