The Nissan Path

Hi all, I have an '02 Pathfinder that has been making some strange noises lately. When I start it, it makes a very loud squealing sound and the headlights and interior lights dim a little. It usually stops making sound once the car is warmed up a bit (or if it's warm outside), but it's really loud. I had an AC belt replaced on it about a year ago, so I wonder if maybe the alternator is starting to fail?

In short: loud squealing and slight loss of electrical power when starting up and accelerating up to 30 mph.

Any insight would be much appreciated!!

Belts due stretch over time. Any chance it just needs to be adjusted?

Either a belt issue, or your alternator spun a bearing.