Battery Warning Light Blinking - 02 Tahoe - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Tahoe & Suburban
Log In 

Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
Platform: GMT 400, 800, 900
Sponsored by: Dorman

LinkBack Thread Tools Search this Thread
Old 08-12-2009, 07:05 PM
CF Beginner
Join Date: Aug 2009
Posts: 1
Default Battery Warning Light Blinking - 02 Tahoe

My battery warning light just started to blink on and off every few seconds. The voltage meter is also down to around 12. I had a new OEM alternator put in the vehicle about 3 months ago and all wires and connections look solid. The battery is a probably 2 1/2 years old and I'm wondering if that could be it. Any insight wold be appreciated.

Reply With Quote
Old 08-12-2009, 09:59 PM
73shark's Avatar
Join Date: Apr 2006
Location: KC, MO area
Posts: 8,845

Welcome to the forum. Check the battery w/ a good DVM. Fully charged should read > 13V.
2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard

2007 Black Tahoe LTZ (Sold)
Reply With Quote
Old 08-12-2009, 11:04 PM
MDTAHOE's Avatar
Super Moderator
Professional Mechanic
Join Date: Nov 2008
Location: Bowie, MD
Posts: 2,955

Most of the time when the battery light comes on it needs a alternator. It should actually be called a alternator light. With a car or truck running the battery actually does not do much, it is kind just a buffer for the electrical system. The alternator provides the voltage, when the battery light is on it means that voltage has gone below a specific amount so when that alternator is not charging properly the car begins to run off the battery power. Then because battery voltage has gotten to low (because alternator is not working and charging) the light comes on. You should have the battery and alternator tested. The $20 or less for the test will save a lot if you get the wrong part. Just because a alternator puts out voltage does not mean it works it must put out the correct amperage to charge the battery and run the entire electrical system. Also new or almost new does not mean good. I have seen several new alternators fail days, weeks or months after install.
ASE Master Tech, L1 Advance Engine Performance certified
I will not answer repair questions by PM, if you would like my input you can PM me and ask me to reply to your public thread.
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
security, battery, and low fuel lights blinking on message! trryhmmnd General Tech 0 10-20-2014 04:20 PM
2001 Impala LA Blinking Battery Light kymberlee Impala 1 03-13-2011 08:08 PM
Blinking Check Engine Light ? sjp240 K5 Blazer 1 02-23-2008 09:40 PM
warning PEPBOYS warning jffgin General Tech 0 02-02-2008 07:45 PM
security warning in warning center r970 Impala 1 06-03-2007 09:16 AM

04, avalanche, battery, blinking, charging, chevy, engine, flashing, light, lights, limited, message, suburban, tahoe, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 02:57 AM.