06 Tundra, fluctuating voltmeter

[CruisinGA]

Bought a 60k mile '06 Tundra yesterday.

Last night drove a 120 mile trip up I85. I noticed that the voltmeter was more active than I'm used to on vehicles of this vintage.
Even driving at a steady speed, with steady electrical load, the voltmeter had a tendency to fluctuate up and down a little.

Is this typical? Aside from being simply due to gauge behavior, the only other possible cause I know of would be brushes going bad/getting short.

 

[Krust]

Mine does the same thing. The hand in usually in the middle but I can sit for a minute and watch it wiggle a tiny bit. Haven't had any problems though.