So I had my 2001 Deville die on me due to dead battery .. first my traction control light came on then a few others ,the battery light finally came on then shortly after ,the dash went black ! Long story short car died ,dead battery ... thinkin it is the alternator I got a new battery to be able to drive it home where i was stranded from ..worked 30 min. till the battery died ..but did get to run a diagnostic on it with the new fresh battery n it showed the alternator was pushin 14.4 volts .. ! Can it still b bad ??