Voltage Meter Fluctuating in 2001 Silverado 3500
I have a 2001 Silverado 3500. After a
usual day of driving (20-30 miles, no I
don't drive a lot lol) the voltage meter
will read about 15-16 volts like the
volt meter should while driving. But,
now it after few minutes of driving,
the voltage meter will drop down to
about 12-13 volts and sit there
slightly wiggling back and forth.
What could be my problem here?
Thanks for any advice given.