This is a great forum for sure.
No, no need to be concerned, nothing too extreme - just your alternator complaining.
Battery light and loss of HVAC/Radio controls is a classic sign.
Time to invest in a new one, and DO NOT waste your time on just any alternator or you'll be buyin another soon.
I recommend a new Isuzu OEM; Bosch; or perhaps Hitachi - but don't visit just any parts store, although Napa has a good one (can't remember the name) and expect to pay close to $200+
Don't hesitate too long on this, or it will string out your battery - although they generally both go at the same time.