New Battery - Weird Gauge Activity

[mdk]

2014 GMC Sierra 1500

My battery tested as pooched the other day so I put in a new one.

Now the dash gauge stays at about 12V while driving except every hour and a half or so will go just above 14V for 3-4 minuets then go back to 12V.

I never remember this ever happening before.  The gauge was always at just above the 14V and stayed there.

Is this just because the battery is new and doesn't need to draw a charge very often or is something wrong with the battery?

Please let me know.

Thanks.

[Jsdirt]

Computer controlled alternator. Since your new battery was presumably fully charged, the ECM cut back on the field duty cycle. This system has been confounding owners since 2007.

[garagerog]

Jsdirt is on the mark except it has been since the 2005 model.

[mdk]

Thanks!  Is there a way to reset it?

 

[dsr611]

7 hours ago, mdk said:

Thanks!  Is there a way to reset it?

 

There's nothing to reset...the system is working exactly as it should.

 

Direct from the owner's manual...

[mdk]

Well thanks to all.  This forum is awesome.