battery light

Hello everyone! I have a 2000 buick lesabre that I purchased about 2 years ago from a relative of mine. The car currently has about 76k miles on it and was running very well up until recently. About mid June the car started shutting off randomly when I was driving and I would have to pull...

Long story short, I was just at the end of a 200 mile road trip when my battery light started flashing. Turned out the alternator and battery both died at once. Replaced both, battery is charging, alternator works fine. Voltage is good from both (12.7 from battery and 14.3 from alternator), but...