2008 Battery Gauge (Full Version)

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2008 Battery Gauge

  

900rrSTUD -> 2008 Battery Gauge (4/26/2008 5:08:08 PM)

I have a 2008 5.3 crew cab and was wondering what the alternator is suppose to charge at. When I first start it up it jumps up to around 14.9V and then with in a min. it goes down to around 13V. Is this normal or do I need to call the dealership Monday?

  
northey87 -> RE: 2008 Battery Gauge (4/26/2008 5:26:54 PM)

Welcome to the forum!!! Anywhere form 13 to a litttle over 14 is normal. My '95 stays around 13.8 +/- .2.

900rrSTUD -> RE: 2008 Battery Gauge (4/26/2008 5:46:50 PM)

I guess it jumps up to 14.8V when I first start it to charge the the battery back up faster to replace the juice it used when it started up?

sierra_5300 -> RE: 2008 Battery Gauge (4/26/2008 6:53:03 PM)

yes this is normal gm came out with some fuel saving crap in 2006 that regulates the alternator down to about 13 something when it senses that it doesnt need to put out full amperage. Anytime headlights are on or windsheild wipers, coolings fans on high it defaults and reguales off of the alternator instead of the computer. My 06 sierra has it its gay it tryed to bybass it no way around it.

900rrSTUD -> RE: 2008 Battery Gauge (4/26/2008 6:56:07 PM)

Thanks for the help guys!

  

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