Hi fellas, been awhile, busy with commuting for work.
A few days ago, the voltage gauge dropped to what looks like 12+ volts 1/2 way home during a 70 mile commute. usually the gauge always sits at 14, or just a hair over 14V.
Today on the way home it did it again. Now in the morning when I leave its a steady 14+ for 70 miles no issues. On the way home today it dropped and stayed there. The gauge will ocassionally come up to 14V but not stay there very long and back down to 12. When I got home I checked the system while the truck was running and saw 12.5 - 12.7 when the gauge was low, and 13.7-14.5 when the gauge was high. With the truck off, the voltage drops steadily from 12.71 down to 12.2
whats happening here, it the alternator having problems or a bad battery?
history, 2019 Used Silverado purchased a few months ago with 3060 miles. truck is 3+ years old original battery. Truck now has 8500 miles and this just started... everything else looks good.
is this from intelligent voltage control or similar?
Thank you.