Intermittent battery not charging for about two minutes?

Tiny
BILLHILL
  • MEMBER
  • 2004 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Car starts and runs fine. Then sometimes, following occurs, red battery light on dash, dash voltage drops about 1/2, warning message of battery not charging. Lasts for a minute or two then goes away. Normal voltage at battery but have not been able to check it when above happens. New battery last week, did not correct. Suspect, ground cable, voltage regulator, alternator. Where should I begin? The alternate output in little red box looks rusty so I thought that I should remove battery ground, remove that and wire brush for possible starters.
Wednesday, June 21st, 2023 AT 4:52 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,854 POSTS
Yep, I would clean the connection, but it sounds like the alternator is going out.

here is a video to show you how to change it out:

https://youtu.be/d3dt5cQGhmM

Please let us know if you need anything else to get the problem fixed.

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Wednesday, June 21st, 2023 AT 11:56 AM

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