Volt/Amp dash gauge goes down then up...?

[SBreaux]

I have a 2007. 5 6. 7 3500 Mega-cab. I noticed recently that when I stop some where after driving say 6 miles, my volt/amp gauge will drop from 14v to 12v, and then return back to 14v after a few seconds. This only happens like when I drive to work or back home. This looks like either something is being energized, turned on, or some other event, and a big current draw is occurring. Has anyone else experienced this, or noticed this? I have had no problems with my truck. It has the AU flash, 2300 miles, and has been good so far. Any ideas as to what this could be? I have heard everyone talk about regening, but I have no way to tell if this is what is happening.



Thank you for any input.



SB

 

[WKruger]

Depending on the temperature outside and the coolant, I'd say it would be the grid heater.