jth_tahoe

Hello, I drive a 2001 chevy Tahoe and I had an issue where the volt meter was bouncing and the headlights would flicker while driving. I took it to a mechanic and they said the alternator was going bad, so I had them replace it. They said battery was good and everything looked normal. Now a week later, the problem is back and I am trying to figure out where else the issue could be coming from. Looks like all the cables have good connection. Could this be caused by a bad tensioner on the serpentine belt? Any help would be appreciated. Thanks.

oldchevy

Welcome from Florida. I would have the battery tested. Check your battery cables at both ends.