2008 Equinox sport, the battery has completely discharged causing a no start situation. This has happened three seperate times in the last month. No indication of why or when this condition will happen. After the first two times our GM dealer replaced the alternator and it has happened one more time since then. Is anyone else having this issue? There have been quite a few in our city with this same problem according to the boosting company. GM doesn't seem to be sure of the cause or remedy.